Manitowoc IDT0450W/D400 Full Cube Ice Machine 430 lb User Manual

Part Number: 000015430 Rev 04 4/22

Air/Water/Remote Condenser

Ice Machines

Technician’s Handbook

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Safety Notices

Read these precautions to prevent personal injury:

• Read this manual thoroughly before operating,

installing or performing maintenance on the

equipment. Failure to follow instructions in this

manual can cause property damage, injury or death.

• Routine adjustments and maintenance procedures

outlined in this manual are not covered by the

warranty.

• Proper installation, care and maintenance are essential

for maximum performance and trouble-free operation

of your equipment.

• Visit our website www.manitowocice.com for manual

updates, translations, or contact information for

service agents in your area.

This equipment contains high voltage electricity and

refrigerant charge. Installation and repairs are to be

performed by properly trained technicians aware of

the dangers of dealing with high voltage electricity and

refrigerant under pressure. The technician must also

be certified in proper refrigerant handling and servicing

procedures. All lockout and tag out procedures must be

followed when working on this equipment.

• This equipment is intended for indoor use only. Do not

install or operate this equipment in outdoor areas.

• As you work on this equipment, be sure to pay close

attention to the safety notices in this handbook.

Disregarding the notices may lead to serious injury

and/or damage to the equipment.

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DEFINITIONS

DANGER

Indicates a hazardous situation that, if not avoided, will

result in death or serious injury. This applies to the most

extreme situations.

Warning

Indicates a hazardous situation that, if not avoided,

could result in death or serious injury.

Caution

Indicates a hazardous situation that, if not avoided,

could result in minor or moderate injury.

Notice

Indicates information considered important, but not

hazard-related (e.g. messages relating to property

damage).

NOTE: Indicates useful, extra information about the

procedure you are performing.

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Warning

Follow these electrical requirements during

installation of this equipment:

• All field wiring must conform to all applicable

codes of the authority having jurisdiction. It is

the responsibility of the end user to provide the

disconnect means to satisfy local codes. Refer to

rating plate for proper voltage.

• This appliance must be grounded.

• This equipment must be positioned so that the plug

is accessible unless other means for disconnection

from the power supply (e.g., circuit breaker or

disconnect switch) is provided.

• Check all wiring connections, including factory

terminals, before operation. Connections can

become loose during shipment and installation.

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Warning

Follow these precautions to prevent personal injury

during installation of this equipment:

• Installation must comply with all applicable

equipment fire and health codes with the authority

having jurisdiction.

• Connect to a potable water supply only.

• To avoid instability the installation area must be

capable of supporting the combined weight of the

equipment and product. Additionally the equipment

must be level side to side and front to back.

• Remove all removable panels before lifting and

installing and use appropriate safety equipment

during installation and servicing. Two or more

people are required to lift or move this appliance to

prevent tipping and/or injury.

• Do not damage the refrigeration circuit when

installing, maintaining or servicing the unit.

• This equipment contains refrigerant charge.

Installation of the line sets must be performed by

a properly trained and EPA certified refrigeration

technician aware of the dangers of dealing with

refrigerant charged equipment.

• Ice machines require a deflector when installed on

an ice storage bin. Prior to using a non-OEM ice

storage system with this ice machine, contact the

bin manufacturer to assure their ice deflector is

compatible.

• Prior to installing a non-OEM ice storage system

with this ice machine, follow the manufacturers

installation procedures and verify the location and

installation meets the local/national mechanical

codes and stability requirements.

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Warning

Follow these precautions to prevent personal injury

while operating or maintaining this equipment:

• Refer to nameplate to identify the type of refrigerant

in your equipment.

• Only trained and qualified personnel aware of the

dangers are allowed to work on the equipment.

• Read this manual thoroughly before operating,

installing or performing maintenance on the

equipment. Failure to follow instructions in this

manual can cause property damage, injury or death.

• Crush/Pinch Hazard. Keep hands clear of moving

components. Components can move without

warning unless power is disconnected and all

potential energy is removed.

• Moisture collecting on the floor will create a

slippery surface. Clean up any water on the floor

immediately to prevent a slip hazard.

• Never use sharp objects or tools to remove ice or

frost. Do not use mechanical devices or other means

to accelerate the defrosting process.

• When using cleaning fluids or chemicals, rubber

gloves and eye protection (and/or face shield) must

be worn.

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Warning

Follow these precautions to prevent personal injury

while operating or maintaining this equipment:

• Objects placed or dropped in the bin can affect

human health and safety. Locate and remove any

objects immediately.

• Never use sharp objects or tools to remove ice or

frost.

• Do not use mechanical devices or other means to

accelerate the defrosting process.

• When using cleaning fluids or chemicals, rubber

gloves and eye protection (and/or face shield) must

be worn.

DANGER

Do not operate equipment that has been misused,

abused, neglected, damaged, or altered/modified

from that of original manufactured specifications. This

appliance is not intended for use by persons (including

children) with reduced physical, sensory or mental

capabilities, or lack of experience and knowledge, unless

they have been given supervision concerning use of the

appliance by a person responsible for their safety. Do

not allow children to play with, clean or maintain this

appliance without proper supervision.

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Warning

Follow these precautions to prevent personal injury

during use and maintenance of this equipment:

• It is the responsibility of the equipment owner to

perform a Personal Protective Equipment Hazard

Assessment to ensure adequate protection during

maintenance procedures.

• Do Not Store Or Use Gasoline Or Other Flammable

Vapors Or Liquids In The Vicinity Of This Or Any

Other Appliance. Never use flammable oil soaked

cloths or combustible cleaning solutions for

cleaning.

• All covers and access panels must be in place and

properly secured when operating this equipment.

• Risk of fire/shock. All minimum clearances must be

maintained. Do not obstruct vents or openings.

• Failure to disconnect power at the main power

supply disconnect could result in serious injury or

death. The power switch DOES NOT disconnect all

incoming power.

• All utility connections and fixtures must be

maintained in accordance with the authority having

jurisdiction.

• Turn off and lockout all utilities (gas, electric, water)

according to approved practices during maintenance

or servicing.

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DANGER

Follow these flammable refrigeration system

requirements during installation, use or repair of this

equipment:

• Refer to nameplate - Ice machine models may

contain up to 150 grams of R290 (propane)

refrigerant. R290 (propane)is flammable in

concentrations of air between approximately 2.1%

and 9.5% by volume (LEL lower explosion limit and

UEL upper explosion limit). An ignition source at

a temperature higher than 470°C is needed for a

combustion to occur. Refer to nameplate to identify

the type of refrigerant in your equipment.

• To minimize the risk of ignition due to improper

installation, replacement parts or service

procedures, only refrigeration technicians with

flammable refrigerant training who are aware of the

dangers of dealing with high voltage electricity and

refrigerant under pressure are allowed to work on

this equipment.

• All replacement parts must be like components

obtained from the equipment manufacturers

authorized replacement part network.

• This equipment must be installed in accordance with

the ASHRAE 15 Safety Standard for Refrigeration

Systems.

• This equipment can not be installed in corridors or

hallways of public buildings.

• Installation must comply with all applicable

equipment fire and health codes with the authority

having jurisdiction.

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DANGER

Follow these flammable refrigeration system

requirements during installation, use or repair of this

equipment:

• All lockout and tag out procedures must be followed

when working on this equipment.

• This equipment contains high voltage electricity

and refrigerant charge. Shorting electrical wires to

refrigeration tubing may result in an explosion. All

electrical power must be disconnected from the

system before servicing the system. Refrigerant

leaks, can result in serious injury or death from

explosion, fire, or contact with refrigerant or

lubricant mists.

• Do not damage the refrigeration circuit when

installing, maintaining or servicing the unit. Never

use sharp objects or tools to remove ice or frost.

Do not use mechanical devices or other means to

accelerate the defrosting process.

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DANGER

Follow these precautions to prevent personal injury

during use and maintenance of this equipment:

• Units with two power cords must be plugged

into individual branch circuits. During movement,

cleaning or repair it is necessary to unplug both

power cords.

• Never use a high-pressure water jet for cleaning

on the interior or exterior of this unit. Do not use

power cleaning equipment, steel wool, scrapers or

wire brushes on stainless steel or painted surfaces.

• Two or more people are required to move this

equipment to prevent tipping.

• Locking the front casters after moving is the

owner’s and operator’s responsibility. When casters

are installed, the mass of this unit will allow it to

move uncontrolled on an inclined surface. These

units must be tethered/secured to comply with all

applicable codes.

• The on-site supervisor is responsible for ensuring

that operators are made aware of the inherent

dangers of operating this equipment.

• Do not operate any appliance with a damaged cord

or plug. All repairs must be performed by a qualified

service company.

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Table of Contents

Part Number: 000015430 Rev 04 4/22 13

Safety Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

General Information

Model Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Air-Water-Remote Condenser Models . . . . . .19

Model Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Model/Serial Number Location . . . . . . . . . . . . . . . . . 21

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Warranty Registration. . . . . . . . . . . . . . . . . . . .22

LuminIce® II. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Home Screen - LuminIce Icon. . . . . . . . . . . . . .23

Installation

Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . 25

Clearance Requirements. . . . . . . . . . . . . . . . . . . . . . . . 26

Air, Water, Remote Condenser Models . . . . . .26

Ice Machine Heat of Rejection . . . . . . . . . . . . . . . . . . 27

Installation on a Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Ice Machine on a Dispenser Installation . . . . . . . . . 28

Water Supply and Drains . . . . . . . . . . . . . . . . . . . . . . . 29

Line Set Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Remote Condenser . . . . . . . . . . . . . . . . . . . . . .31

Remote Ice Machine Usage with Non-Manitowoc

Multi-Circuit Condensers . . . . . . . . . . . . . . . . . . . . . . . 34

Maintenance

Detailed De-scaling and Sanitizing . . . . . . . . . . . . . . 37

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Detailed De-scaling/Sanitizing Procedure. . . .38

Remedial De-scaling Procedure . . . . . . . . . . . .38

iAuCS® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Exterior Cleaning . . . . . . . . . . . . . . . . . . . . . . . .38

Touchscreen Operation For The Clean Cycle . . . . . 39

Starting a Clean Cycle . . . . . . . . . . . . . . . . . . . .39

Water Curtain/Damper Operation

During The Clean Cycle . . . . . . . . . . . . . . . . . . .39

Pausing A Clean Cycle . . . . . . . . . . . . . . . . . . . .39

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14 Part Number: 000015430 Rev 04 4/22

Power Interruption During Clean Cycle . . . . . .39

Aborting A Clean Cycle . . . . . . . . . . . . . . . . . . .39

Detailed De-scaling/Sanitizing Procedure . . . . . . . 40

De-scaling Procedure . . . . . . . . . . . . . . . . . . . .40

Sanitizing Procedure . . . . . . . . . . . . . . . . . . . . .45

Remedial De-scaling Procedure . . . . . . . . . . . . . . . . . 48

Removal from Service/Winterization. . . . . . . . . . . . 50

Air-Cooled Ice Machines. . . . . . . . . . . . . . . . . .50

Water-Cooled Ice Machines . . . . . . . . . . . . . . .51

Operation

Touchscreen Features . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Home screen icon descriptions . . . . . . . . . . . .55

Setup Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Menu Navigation Overview. . . . . . . . . . . . . . . . . . . . . 58

Settings Menu Screen Navigation . . . . . . . . . .58

Operational Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Ice Thickness Check. . . . . . . . . . . . . . . . . . . . . .64

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . 66

Self Contained Air or Water Cooled. . . . . . . . .66

Energized Parts Chart . . . . . . . . . . . . . . . . . . . .70

Remote Condenser . . . . . . . . . . . . . . . . . . . . . .72

Energized Parts Chart . . . . . . . . . . . . . . . . . . . .76

Troubleshooting

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Alert Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Alert Log Detail . . . . . . . . . . . . . . . . . . . . . . . . .81

Thaw Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Safe Operation Mode . . . . . . . . . . . . . . . . . . . .87

E01 Long Freeze Cycle. . . . . . . . . . . . . . . . . . . .88

E02 Long Harvest Cycle. . . . . . . . . . . . . . . . . . .88

Analyzing Why A Service Fault (E01 & E02)

Stopped the Ice Machine . . . . . . . . . . . . . . . . .88

E01 Long Freeze. . . . . . . . . . . . . . . . . . . . . . . . .89

E02 Long Harvest. . . . . . . . . . . . . . . . . . . . . . . .91

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Part Number: 000015430 Rev 04 4/22 15

Troubleshooting By Symptom. . . . . . . . . . . . . . . . . . . 92

Reset To Factory Defaults . . . . . . . . . . . . . . . . .93

Symptom #1 - Ice Machine Will Not Run . . . .94

Low Production, Long Freeze Cycle . . . . . . . . .97

Symptom #2 - Freeze Cycle Refrigeration

System Operational Analysis Tables. . . . . . . . .99

Symptom #3 & #4 - Harvest Problems

Self-contained Air, Water & Remote Condenser

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Symptom #3 - Self-Contained Air or

Water-cooled. . . . . . . . . . . . . . . . . . . . . . . . . .128

Symptom #3 - Remote Condenser. . . . . . . . .130

Symptom #4 - Self-Contained Air,

Water-Cooled or Remote . . . . . . . . . . . . . . . .132

Component Check Procedures

Electrical Components. . . . . . . . . . . . . . . . . . . . . . . . . 135

Control Board, Display And Touchscreen . . .135

Control Board Relay Test. . . . . . . . . . . . . . . . .138

Programming A Replacement

Control Board . . . . . . . . . . . . . . . . . . . . . . . . .139

USB Flash Drive Specifications

and Formatting . . . . . . . . . . . . . . . . . . . . . . . .140

Exporting Data to a Flash Drive . . . . . . . . . . .141

Upgrading Firmware with a Flash Drive . . . .142

Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . .143

Bin Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Water Level Control Circuitry . . . . . . . . . . . . .147

Ice Thickness Probe (Initiates Harvest) . . . . .151

Bin Level Probe . . . . . . . . . . . . . . . . . . . . . . . .156

Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . .158

High Pressure Cutout (HPCO) Control . . . . . .162

Fan Cycle Control. . . . . . . . . . . . . . . . . . . . . . .165

Harvest Assist Air Pump . . . . . . . . . . . . . . . . .166

Compressor Electrical Diagnostics . . . . . . . . .167

Diagnosing Start Components . . . . . . . . . . . .169

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16 Part Number: 000015430 Rev 04 4/22

Refrigeration Components. . . . . . . . . . . . . . . . . . . . . 172

Head Pressure Control Valve . . . . . . . . . . . . .172

Harvest Pressure Regulating (HPR) System

Remote Condenser Only. . . . . . . . . . . . . . . . .176

Water Regulating Valve. . . . . . . . . . . . . . . . . .179

Refrigerant Recovery/Evacuation . . . . . . . . . . . . . . 180

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

Refrigerant Re-Use Policy . . . . . . . . . . . . . . . .181

Self-Contained Model Procedure . . . . . . . . .183

Remote Condenser Model Procedure . . . . . .187

System Contamination Clean-Up. . . . . . . . . . . . . . . 191

Determining Severity Of Contamination . . . .191

Cleanup Procedure . . . . . . . . . . . . . . . . . . . . .193

Liquid Line Filter-Driers. . . . . . . . . . . . . . . . . . . . . . . . 197

Replacing Pressure Controls Without Removing

Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Total System Refrigerant Charge . . . . . . . . . . . . . . . 199

Self-Contained Air & Water Cooled . . . . . . . .199

Remote Condenser . . . . . . . . . . . . . . . . . . . . .200

Charts

Cycle Times/24-Hour Ice Production/Refrigerant

Pressure Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

IF0300 Series . . . . . . . . . . . . . . . . . . . . . . . . . .202

IT0300 Series . . . . . . . . . . . . . . . . . . . . . . . . . .204

IT0420 Series . . . . . . . . . . . . . . . . . . . . . . . . . .206

IT0450 Series . . . . . . . . . . . . . . . . . . . . . . . . . .208

IT0500 Series . . . . . . . . . . . . . . . . . . . . . . . . . .210

IF0500 Series . . . . . . . . . . . . . . . . . . . . . . . . . .213

IF0600 Series . . . . . . . . . . . . . . . . . . . . . . . . . .214

IT0620 Series . . . . . . . . . . . . . . . . . . . . . . . . . .217

IT0750 Series . . . . . . . . . . . . . . . . . . . . . . . . . .219

IF0900 Series . . . . . . . . . . . . . . . . . . . . . . . . . .221

IT0900 series . . . . . . . . . . . . . . . . . . . . . . . . . .224

IT1200 Series . . . . . . . . . . . . . . . . . . . . . . . . . .226

IT1500 Series . . . . . . . . . . . . . . . . . . . . . . . . . .229

IT1900 Series . . . . . . . . . . . . . . . . . . . . . . . . . .232

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Part Number: 000015430 Rev 04 4/22 17

Diagrams

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Wiring Diagram Legend . . . . . . . . . . . . . . . . .235

IF0300/IT0420/IT0450/IT0500/

IT0620/IT0750

1ph Air/Water . . . . . . . . . . . . . . . . . . . . . . . . .236

IT0500/IT1200 - 1ph Remote . . . . . . . . . . . . .238

IF0600/IF0900/IT0900/IT1200 -

1ph Air/Water . . . . . . . . . . . . . . . . . . . . . . . . .240

IF0600/IF0900/IT0900/IT1200 -

3ph Air/Water . . . . . . . . . . . . . . . . . . . . . . . . .242

IT1500/IT1900 - 1ph Air/Water . . . . . . . . . . .244

IT1500/IT1900 - 3 ph Air/Water. . . . . . . . . . .246

IF0500/IF0600/IF0900/IT1200/IF1500 -

1ph Remote . . . . . . . . . . . . . . . . . . . . . . . . . . .248

IF0500/IF0600/IF0900/IT1200/IF1500 -

3ph Remote Condenser . . . . . . . . . . . . . . . . .250

Electronic Control Board. . . . . . . . . . . . . . . . . . . . . . . 252

Electrical Noise Filter . . . . . . . . . . . . . . . . . . .254

Refrigeration Tubing Schematics . . . . . . . . . . . . . . . 255

Self-Contained Air or Water-Cooled . . . . . . .255

Remote Air-Cooled Condenser Models . . . . .259

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Model Numbers

AIRWATERREMOTE CONDENSER MODELS

Self-Contained

Air-Cooled

Self-Contained

Water-Cooled

Remote

IDF0300A

IYF0300A

IDF0300W

IYF0300W

----

IDT0300A

IYT0300A

IDT0300W

IYT0300W

----

IDT0420A

IYT0420A

IDT0420W

IYT0420W

----

IDT0450A

IYT0450A

IDT0450W

IYT0450W

----

IDF0500N

IYF0500N

IDT0500A

IYT0500A

IRT0500A

IDT0500W

IYT0500W

IRT0500W

IDT0500N

IYT0500N

----

IDF0600A

IYF0600A

IDF0600W

IYF0600W

IDF0600N

IYF0600N

IDT0620A

IYT0620A

IRT0620A

IDT0620W

IYT0620W

IRT0620W

----

IDT0750A

IYT0750A

IRT0750A

IDT0750W

IYT0750W

IRT0750W

----

IDF0900A

IYF0900A

IRF0900A

IDF0900W

IYF0900W

IRF0900W

IDF0900N

IYF0900N

----

IDT0900A

IYT0900A

IRT0900A

IDT0900W

IYT0900W

IRT0900W

IDT0900N

IYT0900N

----

IDT1200A

IYT1200A

IDT1200W

IYT1200W

IDT1200N

IYT1200N

IDT1500A

IYT1500A

IDT1500W

IYT1500W

IDT1500N

IYT1500N

IDT1900A

IYT1900A

IRT1900A

IDT1900W

IYT1900W

----

IDT1900N

IYT1900N

IRT1900N

Additional designators identify Voltage, Specials or Country

specific models See “Model Nomenclature” on page 20

General Information

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20 Part Number: 000015430 Rev 04 4/22

Model Nomenclature

ICE

MACHINE

SERIES

Indigo

U Undercounter

K Koolaire

R Flake/Nugget

Big shot

S S-series

IB Ice Beverage

C Countertop

REFRIGERANT

TYPE

R290 (propane)

F R404A (four)

T R410A (ten)

B R600A (butane)

R134A (eight)

NOMINAL PRODUCTION @

70/50

0300

produces

~300 #/day

0320 produces ~320 #/day

0350 produces

~350 #/day

etc. . .

Soo is stated

kg/day

CONDENSER TYPE

A air cooled

W water cooled

remote

(tradional)

C CVD (remote)

POWER CORD OPTION

SPECIAL USE

Blank general use

Q coated condenser

H high pressure

M marine

P correconal

Ttopair

discharge

X LuminIce®/Sanitaon

lever

space

maker

MARKET IDENTIFIER

Blank not market speciﬁc

S Saudi

Arabia (GCC)

K Korea (KC)

C China (CCC)

Germany (GS)

Brazil (InMetro)

ICE TYPE

R Regular

DDice

Half-dice

F Flake

N Nugget

Gourmet

Blank for IB only

ELECTRICAL

CONFIGURATION

161 = 115/60/1

261 = 208-230/60/1

251 = 220-

240/50/1 (S=230)

263 =

208-

230/60/3

271 = 200/50-60/1

273 = 200/50-60/3

453 = 380-415/50/3

463 = 460/60/3

2= 22" wide cabinet

all other

mean

producon

value

I Y T 1500N–261X

A Alternate Compressor

juncon box

cord without plug

NEMA plug (USA)

schuko plug (EU)

13A blade (GBR)

oblique V blades

Australia

Blank

(AUS)

R452A

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Part Number: 000015430 Rev 04 4/22 21

Ice Cube Sizes

Regular

1-1/8" x 1-1/8" x 7/8"

2.86 x 2.86 x 2.22 cm

Dice

7/8" x 7/8" x 7/8"

2.22 x 2.22 x2.22 cm

Half Dice

3/8" x 1-1/8" x 7/8"

0.95 x 2.86 x 2.22 cm

Notice

All Manitowoc ice machines require the ice storage

system (bin, dispenser, etc.) to incorporate an ice

deflector.

Prior to using a non-Manitowoc ice storage system

with other Manitowoc ice machines, contact the

manufacturer to assure their ice deflector is compatible

with Manitowoc ice machines.

Model/Serial Number Location

These numbers are required when requesting information

from your local Manitowoc Distributor, service

representative, or Manitowoc Ice.

• The model and serial number can be viewed by

pressing the information icon on the touchscreen.

• The owner warranty registration card.

• The model/serial number data plate located in the

evaporator compartment and on the back of the ice

machine.

The model and serial number displayed on the touchscreen

must match the data plate for proper operation.

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22 Part Number: 000015430 Rev 04 4/22

Warranty

For warranty information visit:

www.manitowocice.com/Service/Warranty

• Warranty Coverage Information

• Warranty Registration

• Warranty Verification

Warranty coverage begins the day the ice machine is

installed.

WARRANTY REGISTRATION

Completing the warranty registration process is a quick and

easy way to protect your investment.

Scan the QR code with your smart device or enter the link

in a web browser to complete your warranty registration.

WWW.MANITOWOCICE.COM/SERVICE/WARRANTY#WARRANTY

REGISTRATION

Registering your product insures warranty coverage and

streamlines the process if any warranty work is required.

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Part Number: 000015430 Rev 04 4/22 23

LuminIce® II

The LuminIce® growth inhibitor recirculates the air in the

ice machine foodzone over a UV bulb. This process will

inhibit the growth of common micro-organisms on all

exposed foodzone surfaces.

• LuminIce® bulbs require replacement on a yearly basis.

• The control board can be set to automatically display a

reminder after 12 months.

NOTE: LuminIce® and LuminIce® II bulbs are not

interchangeable; verify your model before ordering a

replacement bulb.

HOME SCREEN  LUMINICE ICON

• A blue icon: Normal Operation.

• A red icon: Bulb Replacement is required.

• Flashing Red/Blue icon: Incorrect bulb is installed.

• Flashing Red icon: Replace the LuminIce module.

Cleanup Procedure for Accidental Bulb Breakage

The cleanup procedure is identical to the procedure used

to clean up compact fluorescent (CFL) or fluorescent tube

lights. These lights contain a small amount of mercury

sealed within a glass tube. Breaking these types of lights

will release mercury and mercury vapor. The broken bulb

can continue to release mercury vapor until it is cleaned up

and removed.

The latest EPA procedures can be viewed on their website

at www.epa.gov/cfl/cflcleanup.html.

NOTE: LuminIce® and LuminIce® II bulbs are not

interchangeable; verify your model before ordering a

replacement bulb. LuminIce® bulbs have a white base and

LuminIce® II bulbs have a blue base.

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THIS PAGE INTENTIONALLY LEFT BLANK

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Part Number: 000015430 Rev 04 4/22 25

Location of Ice Machine

The location selected for the ice machine must meet the

following criteria. If any of these criteria are not met,

select another location.

• The location must be indoors and must be free of

airborne and other contaminants.

• The location must allow enough clearance for water,

drain, and electrical connections in the rear of the ice

machine.

• Self contained air cooled, water cooled or head section

for remote air cooled condenser models - The air

temperature must be at least 35°F (1.6°C), but must

not exceed 110°F (43.4°C).

• Remote air cooled condenser - The air temperature

must be at least -20°F (-29°C), but must not exceed

120°F (49°C).

• Ice Making Water Inlet - Water Pressure must be

at least 20 psi (1.4 bar), but must not exceed 80 psi

(5.5 bar).

• Condenser Water Inlet - Water Pressure must be at

least 20 psi (1.4 bar), but must not exceed 276 psi

(19 bar).

• The location must not be near heat-generating

equipment or in direct sunlight and protected from

weather.

• The location must not obstruct air flow through or

around the ice machine. Refer to chart below for

clearance requirements.

• The ice machine must be protected if it will be

subjected to temperatures below 32°F (0°C). Failure

caused by exposure to freezing temperatures is not

covered by the warranty.

Installation

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26 Part Number: 000015430 Rev 04 4/22

Clearance Requirements

AIR, WATER, REMOTE CONDENSER MODELS

IF0300/IT0300

Self-Contained

Air-Cooled

Water-Cooled

Top/Sides 16" (40 cm) 8" (20 cm)

Back 5" (13 cm) 5" (13 cm)

IT0420/IT0620

Self-Contained

Air-Cooled

Water-Cooled

Top/Sides 12" (31 cm) 8" (20 cm)

Back 5" (13 cm) 5" (13 cm)

IT0450/IF0500

IT0500/IF0600

IT0750

Self-Contained

Air-Cooled

Water-Cooled and

Remote

Top/Sides 8" (20.3 cm) 8" (20.3 cm)

Back 5" (12.7 cm) 5" (12.7 cm)

IF0900/IT0900

Self-Contained

Air-Cooled

Water-Cooled and

Remote

Top/Sides 8" (20.3 cm) 8" (20.3 cm)

Back 5" (13 cm) 5" (13 cm)

IT1200

Self-Contained

Air-Cooled

Water-Cooled

and Remote

Top 8" (20.3 cm) 8" (20.3 cm)

Sides 8” (20.3 cm) 8" (20.3 cm)

Back 5" (12.7 cm) 5" (12.7 cm)

IT1500

Self-Contained

Air-Cooled

Water-Cooled

and Remote

Top 12" (30.5 cm) 8" (20.3 cm)

Sides 8" (20.3 cm) 8" (20.3 cm)

Back 5" (12.7 cm) 5" (12.7 cm)

IT1900

Self-Contained

Air-Cooled

Water-Cooled

and Remote

Top 12" (30.5 cm) 8" (20.3 cm)

Sides 8" (20.3 cm) 8” (20.3 cm)

Back 5" (12.7 cm) 5" (12.7 cm)

Top Air Discharge Kit

This kit directs warm exhaust air upward rather than out

the side panels. Top air discharge kits require the same

clearance requirements.

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Part Number: 000015430 Rev 04 4/22 27

Ice Machine Heat of Rejection

Series Ice

Machine

Heat of Rejection

Air Conditioning* Peak

IF0300 4600 5450

IT0300 3800 6000

IT0420 3800 6000

IT0450 3800 6000

IT0500 3800 6000

IF0600 11800 13700

IT0620 5400 6300

IT0750 12800 13700

IF0900 13000 16000

IT0900 12700 14800

IT1200 16200 19100

IT1500 23000 27000

IT1900 26100 30500

*BTU/Hour

Because the heat of rejection varies during the ice making cycle,

the figure shown is an average.

Installation on a Bin

• The installation area must be capable of supporting

the combined weight of the equipment and product.

• All ice machines installed on a bin require an ice

deflector.

• Manitowoc bins have a deflector installed and require

no modifications when used with a forward-facing

evaporator.

• Align sides and back of ice machine with sides and

back of bin when placing ice machine on bin.

NOTE: Optional sales kit are available to adapt various

sized or multiple ice machines on large bins. Contact your

local distributor for details.

Warning

PERSONAL INJURY POTENTIAL

Do not operate any ice machine with the deflector

removed.

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28 Part Number: 000015430 Rev 04 4/22

Ice Machine on a Dispenser Installation

Observe the following recommendations unless required

by the dispenser manufacturer.

Refer to the standard equipment price list at

www.manitowocice.com for adapter, deflector or ice

management accessories.

• The installation area must be capable of supporting

the combined weight of the equipment and product.

• An adapter is not required for ice machines that match

the dispenser size.

• A deflector is not required.

• Ice level management is recommended to prevent

water leakage or movement of ice machine during

agitation.

• A dispenser baffle is required to prevent ice from

contacting the ice machine panel and prevent possible

water leakage.

• Align sides and back of ice machine with sides and

back of dispenser when placing ice machine.

• Follow ice machine installation procedures and any

additional installation requirements specified by the

dispenser manufacturer.

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Part Number: 000015430 Rev 04 4/22 29

Water Supply and Drains

Potable Water

• Water temperature must be between

40°F (4.4°C) and 90°F (32°C).

• Water pressure must be between

20 psi (140 kPa) and 80 psi (550 kPa).

• Minimum internal diameter of tubing 3/8" (10 mm).

Drain Connections

• Drain lines must have a 1.5 inch drop per 5 feet (2.5 cm

per meter) of run and must not create traps.

• The floor drain must be large enough to accommodate

drainage from all drains.

• Run separate bin and ice machine drain lines.

• Insulate drain lines to prevent condensation.

• Vent the ice machine drain to the atmosphere.

• Drain termination must have an air gap that meets

local code.

Auxiliary Base Drain Installation

An auxiliary drain is located in the ice machine base to

remove moisture in high humidity areas.

1. View the back of the ice machine base on the

compressor side and locate and remove the cap plug.

2. Route tubing to an open site drain:

• Use 1/2 inch CPVC tubing.

• Apply a bead of silicone around the exterior of the

ice machine tubing and insert into ice machine

base. The silicone will secure the tubing and

provide a watertight seal.

• Provide support for tubing.

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30 Part Number: 000015430 Rev 04 4/22

Line Set Applications

Notice

The 60-month compressor warranty (including the

36-month labor replacement warranty) will not apply if

the Manitowoc Ice Machine, Condenser or QuietQube®

Condensing Unit were not installed according to

specifications. This warranty also will not apply if the

refrigeration system is modified with a condenser,

heat reclaim device, or other parts or assemblies not

manufactured by Manitowoc Ice. Or refrigeration system

additives such as leak detection dyes, inhibitors or non

OEM approved chemicals.

Warning

Recovery locations vary by model. Verify you are making

the correct connections for your model to prevent

accidental release of high pressure refrigerant.

Important

Manitowoc remote systems are only approved and

warranted as a complete new package. Warranty on

the refrigeration system will be void if new equipment

is connected to existing (used) tubing, remote

condenser, remote condensing unit or ice machine

head section.

All line sets must be insulated with ¼” wall thickness

Armaflex.

Important

Condensers must be mounted horizontally with the fan

motor on top with nothing obstructing it. There must

be at least a 16” (41 cm) clearance from the bottom

for air intake.

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Part Number: 000015430 Rev 04 4/22 31

REMOTE CONDENSER

Ice Machine

Remote Single

Circuit Condenser

Line Set*

IF0500N JCF0500

RT-20-R404A

RT-35-R404A

RT-50-R404A

IT0500N JCT0500

RT-20-R410A

RT-35-R410A

RT-50-R410A

IF0600N

IF0900N

JCF0900

RT-20-R404A

RT-35-R404A

RT-50-R404A

IT0900

IT1200N

JCT1200

RT-20-R410A

RT-35-R410A

RT-50-R410A

IT1500N

IT1900N

JCT1500

RL-20-R410A

RL-35-R410A

RL-50-R410A

*Line Set Discharge Line Liquid Line

RT 1/2" (1.27 cm) 5/16" (.79 cm)

RL 1/2" (1.27 cm) 3/8" (.95 cm)

R404A line sets have white protective caps.

R410A line sets have pink protective caps.

All line sets must be insulated with ¼” wall thickness Armaflex.

Air Temperature Around the Condenser

Minimum Maximum

-20°F (-29°C) 120°F (49°C)

Additional Refrigerant Charge For 51' to 100' Line Sets

Ice Machine Condenser Additional Amount of

Refrigerant To Be Added To

Nameplate Charge

IF0500N JCF0500 1.5 lbs - 680 g

IT0500N JCT0500 1.5 lbs - 680 g

IF0600N JCF0900 1.5 lbs - 680 g

IF0900N JCF0900 2.0 lbs - 907 g

IT0900N JCT0900 2.0 lbs - 907 g

IT1200N JCT1200 2.0 lbs - 907 g

IT1500N JCT1500 2.0 lbs - 907 g

IT1900N JCT1500 2.0 lbs - 907 g

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32 Part Number: 000015430 Rev 04 4/22

Calculating Allowable Line Set Distance

Line Set Length

The maximum length is 100' (30.5 m).

Line Set Rise/Drop

The maximum rise is 35' (10.7 m).

The maximum drop is 15' (4.5 m).

35 FT. (10.7 M)

MAXIMUM DISTANCE

35 ft. (10.7 m) Rise: The maximum distance the Condenser

or Condensing Unit can be above the ice machine.

15 FT. (4.5 M)

MAXIMUM

DISTANCE

15 ft. (4.5 m) Drop: The maximum distance the Condenser

or Condensing Unit can be below the ice machine.

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Part Number: 000015430 Rev 04 4/22 33

Calculated Line Set Distance

The maximum calculated distance is 150' (45.7 m).

Line set rises, drops, horizontal runs (or combinations

of these) in excess of the stated maximums will exceed

compressor start-up and design limits. This will cause poor

oil return to the compressor.

Make the following calculations to make sure the line set

layout is within specifications.

1. Insert the measured rise into the formula below.

Multiply by 1.7 to get the calculated rise.

(Example: A condenser located 10 feet above the ice

machine has a calculated rise of 17 feet.)

2. Insert the measured drop into the formula below.

Multiply by 6.6 to get the calculated drop.

(Example. A condenser located 10 feet below the ice

machine has a calculated drop of 66 feet.)

3. Insert the measured horizontal distance into the

formula below. No calculation is necessary.

4. Add together the calculated rise, calculated drop,

and horizontal distance to get the total calculated

distance. If this total exceeds 150' (45.7 m), move

the condenser to a new location and perform the

calculations again.

Maximum Line set Distance Formula

Measured Rise ____ X 1.7 = ______Calculated Rise

(35 ft. Max)

Step 1

Measured Drop ____ X 6.6 = ______Calculated Drop

(15 ft. Max.)

Step 2

Measured Horizontal Distance = _________Horizontal

(100 ft. Max.) Distance

Step 3

Total Calculated Distance = ___________Total Calculated

(150 ft. Max.) Distance

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34 Part Number: 000015430 Rev 04 4/22

Remote Ice Machine Usage with Non-

Manitowoc Multi-Circuit Condensers

Warranty

The sixty (60) month compressor warranty, including thirty

six (36) month labor replacement warranty, shall not apply

when the remote ice machine is not installed within the

remote specifications. The foregoing warranty shall not

apply to any ice machine installed and/or maintained

inconsistent with the technical instructions provided

by Manitowoc Ice. Performance may vary from Sales

specifications. ARI certified standard ratings only apply

when used with a Manitowoc remote condenser.

If the design of the condenser meets the specifications,

Manitowoc’s only approval is for full warranty coverage

to be extended to the Manitowoc manufactured part of

the system. Since Manitowoc does not test the condenser

in conjunction with the ice machine, Manitowoc will not

endorse, recommend, or approve the condenser, and will

not be responsible for its performance or reliability.

Important

Manitowoc warrants only complete new and unused

remote packages. Guaranteeing the integrity of a new

ice machine under the terms of our warranty prohibits

the use of pre-existing (used) tubing or condensers.

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Part Number: 000015430 Rev 04 4/22 35

Design & Burst Pressure

Design Pressure 600 psig - 4137 kPa

Burst Pressure 2500 psig - 17237 kPa

Head Pressure Control Valve

Do not use a fan cycling control to try to maintain

discharge pressure. Compressor failure will result. Any

remote condenser connected to a Manitowoc Ice Machine

must have the OEM head pressure control valve installed.

Manitowoc will not accept substitute “off the shelf” head

pressure control valves.

Kits are available for head pressure control installation:

• R404A Refrigerant - K00221

• R410A Refrigerant - K00479

Fan Motor

The condenser fan must be on during the complete ice

machine freeze cycle (do not cycle on fan cycle control).

The ice maker has a condenser fan motor circuit for use

with a Manitowoc condenser. It is recommended that

this circuit be used to control the condenser fan(s) on the

multi-circuit condenser to assure it is on at the proper

time. Do not exceed the rated amps for the fan motor

circuit listed on the ice machine’s serial tag.

Internal Condenser Volume

The multi-circuit condenser internal volume must not

be less than or exceed that used by Manitowoc. Do

not exceed internal volume and try to add charge to

compensate, as compressor failure will result.

Model

Minimum

ft³ (cm³)

Maximum

ft³ (cm³)

IF0500N / IT0500N 0.020 (566) 0.030 (850)

IF0600

IF0900N / IT0900N

T1200N

0.045 (1274) 0.060 (1699)

IT1500N

IT1900N

0.085 (2407) 0.105 (2973)

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36 Part Number: 000015430 Rev 04 4/22

Heat of Rejection

Model Peak Average

IF0500N/IT0500N 3800 6000

IF0600N 11800 13000

IF0900N/IT0900N 13000 16000

IT1200N 16200 19100

IT1500N 23000 27000

IT1900N 26100 30500

Refrigerant Charge

The ice machine model/serial tag lists the refrigerant

amount. Remote condensers and line sets contain a vapor

charge only.

Refer to “Total System Refrigerant Charge” on page 199

for system refrigerant amounts.

Quick Connect Fittings

The ice machine and line sets come with quick connect

fittings. It is recommended that matching quick connects

(available through Manitowoc Distributors K00129) be

installed in the multi-circuit condenser, and that a vapor

“holding” charge, 5 oz. (150 ml), of proper refrigerant be

added to the condenser prior to connection of the ice

machine or line set to the condenser.

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Part Number: 000015430 Rev 04 4/22 37

Detailed De-scaling and Sanitizing

GENERAL

You are responsible for maintaining the ice machine

in accordance with the instructions in this manual.

Maintenance procedures are not covered by the warranty.

De-scale and sanitize the ice machine a minimum of once

every six months for efficient operation. If the ice machine

requires more frequent de-scaling and sanitizing, consult

a qualified service company to test the water quality and

recommend appropriate water treatment. An extremely

dirty ice machine must be taken apart for descaling and

sanitizing.

Manitowoc Ice Machine De-scaler and Sanitizer are

the only products approved for use in Manitowoc ice

machines.

Caution

Use only Manitowoc approved Ice Machine De-scaler

and Sanitizer for this application (Manitowoc De-scaler

part number 9405463 and Manitowoc Sanitizer part

number 9405653). It is a violation of Federal law to

use these solutions in a manner inconsistent with their

labeling. Read and understand all labels printed on

bottles before use.

Caution

Do not mix De-scaler and Sanitizer solutions together. It

is a violation of Federal law to use these solutions in a

manner inconsistent with their labeling.

Warning

Wear rubber gloves and safety goggles (and/or face

shield) when handling Ice Machine De-scaler or Sanitizer.

Maintenance

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DETAILED DESCALING/SANITIZING PROCEDURE

This procedure must be performed a minimum of once

every six months.

• The ice machine and bin must be disassembled

de-scaled and sanitized.

• All ice produced during the de-scaling and sanitizing

procedures must be discarded.

• Removes mineral deposits from areas or surfaces that

are in direct contact with water.

REMEDIAL DESCALING PROCEDURE

• This procedure de-scales all components in the water

flow path, and is used to de-scale the ice machine

between the bi-yearly detailed de-scaling/sanitizing

procedure.

IAUCS®

iAuCS® does not operate when the Clean button is used to

start a clean cycle. To prime the hose, activation is required

through the Service Menu/iAuCS® icon.

EXTERIOR CLEANING

Clean the area around the ice machine as often as

necessary to maintain cleanliness and efficient operation.

Wipe surfaces with a damp cloth rinsed in water to remove

dust and dirt from the outside of the ice machine. If a

greasy residue persists, use a damp cloth rinsed in a mild

dish soap and water solution. Wipe dry with a clean, soft

cloth.

The exterior panels have a clear coating that is stain

resistant and easy to clean. Products containing abrasives

will damage the coating and scratch the panels.

• Never use steel wool or abrasive pads for cleaning.

• Never use chlorinated, citrus based or abrasive

cleaners on exterior panels and plastic trim pieces.

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Part Number: 000015430 Rev 04 4/22 39

Touchscreen Operation For The Clean Cycle

STARTING A CLEAN CYCLE

Pressing the Clean icon will display a Continue/Abort

screen, and a warning that pressing Continue will result in

a clean cycle that can last up to 35 minutes.

WATER CURTAIN/DAMPER OPERATION DURING THE

CLEAN CYCLE

The water curtain/damper must remain closed during the

de-scaling and sanitizing procedures. When the curtain/

damper is open for more than 3 seconds the clean cycle

stops and a message is displayed on the touchscreen with

a choice to continue or stop the clean cycle. Stopping the

clean cycle will result in a series of rinse and dump cycles

to verify de-scaler or sanitizer has been removed before

ice making.

PAUSING A CLEAN CYCLE

The clean cycle can be paused and resumed at any time

by pressing the power button. The clean cycle will resume

from the beginning of either the wash or rinse cycle

depending on the point of interruption.

POWER INTERRUPTION DURING CLEAN CYCLE

If the power supply is interrupted during the clean cycle

the state is retained in the circuit board. When power is

reapplied the clean cycle will resume from the beginning

of either the wash or rinse cycle depending on the point of

interruption.

ABORTING A CLEAN CYCLE

Verify de-scaler or sanitizer is not present in the water

system before aborting a clean cycle.

1. Press and hold the Clean button, then press and

release the power button.

2. Release the Clean button and select abort from the

touchscreen.

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40 Part Number: 000015430 Rev 04 4/22

Detailed De-scaling/Sanitizing Procedure

Caution

Use only Manitowoc approved Ice Machine De-scaler

and Sanitizer for this application (Manitowoc De-scaler

part number 9405463 and Manitowoc Sanitizer part

number 9405653). It is a violation of Federal law to

use these solutions in a manner inconsistent with their

labeling. Read and understand all labels printed on

bottles before use.

DESCALING PROCEDURE

Caution

Do not mix De-scaler and Sanitizer solutions together. It

is a violation of Federal law to use these solutions in a

manner inconsistent with their labeling.

Warning

Wear rubber gloves and safety goggles (and/or face

shield) when handling Ice Machine De-scaler or Sanitizer.

Ice machine de-scaler is used to remove lime scale and

mineral deposits. Ice machine sanitizer disinfects and

removes algae and slime.

NOTE: Although not required and dependent on your

installation, removing the ice machine top cover may allow

easier access.

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Step 1 Open the front panel to access the evaporator

compartment. Ice must not be on the evaporator during

the de-scaling/sanitizing procedure. Follow one of the

methods below:

• Press the power switch at the end of a harvest cycle

after ice falls from the evaporator(s).

• Press the power switch and allow the ice to melt

• Use the touchscreen to initiate a manual harvest cycle.

Notice

Never use anything to force ice from the evaporator.

Damage may result.

Step 2 Remove all ice from the bin/dispenser.

Step 3 Press the Clean button and select “Turn off

when complete”. Water will flow through the water dump

valve and down the drain. Wait approximately 1 minute

until the water trough refills and the display indicates Add

Chemical. Add the proper amount of ice machine de-scaler

to the water trough by pouring between the water curtain

and evaporator, then confirm the chemical was added.

NOTE: There is a 10 minute time limit to confirm chemical

was added.

• Confirmation is pushed within 10 minutes - The ice

machine will start a 10 minute wash cycle, followed by

6 rinse and flush cycles.

• Confirmation is not pushed within 10 minutes - The ice

machine will skip the 10 minute wash cycle and start 6

rinse and flush cycles.

Model Amount of De-scaler

IF0300/IT0300/IT0420/IT0620 3 ounces (90 ml)

IT0450/IF0500/IT0500/IF0600

IT0750/IF0900/IT0900/IT1200

5 ounces (150 ml)

IT1500/IT1900 9 ounces (265 ml)

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Step 4 Wait until the cycle is complete, then

disconnect power to the ice machine (and dispenser when

used).

Warning

Disconnect the electric power to the ice machine at the

electric service switch box.

Step 5 Remove parts for descaling.

A. Remove the water curtain

• Gently flex the curtain in the center and remove it

from the right side.

• Slide the left pin out.

B. Remove the water trough and water diverter from

the bottom of the evaporator.

• Depress tabs on right and left side of the water

trough.

• Allow front of water trough to drop as you pull

forward to disengage the rear pins.

• Loosen thumbscrew on left side of water diverter

tray.

• Allow left side of tray to drop as you pull the tray

to the left to slide the right pin out.

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C. Remove the water level probe

• Pull the water level probe straight down to

disengage.

• Lower the water level probe until the wiring

connector is visible.

• Disconnect the wire lead from the water level

probe.

• Remove the water level probe from the ice

machine.

D. Remove the ice thickness probe

• Compress the hinge pin on the top of the ice

thickness probe.

• Pivot the ice thickness probe to disengage one

pin then the other. The ice thickness probe can be

de-scaled at this point without complete removal.

If complete removal is desired, disconnect the ice

thickness control wiring from the control board.

E. Remove the water distribution tube

NOTE: Distribution tube thumbscrews are retained

to prevent loss. Loosen thumbscrews but do not pull

thumbscrews out of distribution tube.

• Loosen the two outer screws (do not remove

screws completely they are retained to prevent

loss) and pull forward on the distribution tube to

release from slip joint.

Disassemble distribution tube by loosening the two

(2) middle thumbscrews and dividing the distribution

tube into two pieces. Please refer to the proper parts

removal for your ice machine. Continue with step 6

when the parts have been removed.

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Step 6 Mix a solution of de-scaler and lukewarm water.

Depending upon the amount of mineral buildup, a larger

quantity of solution may be required. Use the ratio in the

table below to mix enough solution to thoroughly de-scale

all parts.

Solution Type Water Mixed With

De-scaler 1 gal. (4 L) 16 oz (475 ml) de-scaler

Step 7 Use 1/2 of the de-scaler/water mixture to

de-scale all components. The solution will foam when it

contacts lime scale and mineral deposits; once the foaming

stops use a soft-bristle nylon brush, sponge or cloth (NOT a

wire brush) to carefully de-scale the parts. Soak parts for 5

minutes (15 - 20 minutes for heavily scaled parts). Rinse all

components with clean water.

Notice

Do not clean the ice thickness probe in a dishwasher.

Permanent damage to the ice thickness probe will occur.

Ice Thickness Probe & Water Level Probe

De-scale the probes using the following procedure.

NOTE: Do not soak electrical connectors in de-scaler or

sanitizer solution.

1. Mix a solution of Manitowoc ice machine de-scaler

and water (2 ounces of de-scaler to 16 ounces of

water) in a container.

2. De-scale all probe surfaces including all plastic parts

(do not use abrasives). Verify all surfaces are clean.

Thoroughly rinse probes with clean water.

3. Reinstall probe, then sanitize the ice machine and bin/

dispenser interior surfaces.

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Step 8 While components are soaking, use 1/2 of the

de-scaler/water solution to de-scale all food zone surfaces

of the ice machine and bin (or dispenser). Use a nylon

brush or cloth to thoroughly de-scale the following ice

machine areas:

• Side walls

• Base (area above water trough)

• Evaporator plastic parts - including top, bottom, and

sides

• Bin or dispenser

Rinse all areas thoroughly with clean water.

SANITIZING PROCEDURE

Step 9 Mix a solution of sanitizer and lukewarm water.

Solution Type Water Mixed With

Sanitizer 3 gal. (12 L) 2 oz (60 ml) sanitizer

Step 10 Use 1/2 of the sanitizer/water solution to

sanitize all removed components. Use a spray bottle to

liberally apply the solution to all surfaces of the removed

parts or soak the removed parts in the sanitizer/water

solution. Do not rinse parts after sanitizing.

Step 11 Use 1/2 of the sanitizer/water solution to

sanitize all food zone surfaces of the ice machine and bin

(or dispenser). Use a spray bottle to liberally apply the

solution. When sanitizing, pay particular attention to the

following areas:

• Side walls

• Base (area above water trough)

• Evaporator plastic parts - including top, bottom and

sides

• Bin or dispenser

Do not rinse the sanitized areas.

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Step 12 Replace all removed components.

Step 13 Wait 20 minutes.

Step 14 Reapply power to the ice machine and press the

Clean button.

Step 15 Press the Clean button and select “Make ice

when complete”. Water will flow through the water dump

valve and down the drain. Wait approximately 1 minute

until the water trough refills and the display indicates Add

Chemical. Add the proper amount of ice machine sanitizer

to the water trough by pouring between the water curtain

and evaporator, then confirm the chemical was added.

Model Amount of Sanitizer

IF0300/IT0300/IT0420/IT0450

IT0620/IF0500/IT0500

IF0600/IT0750/IF0900/IT0900

IT1200

3 ounces (90 ml)

IT1500/IT1900 6 ounces (180 ml)

Step 16 The ice machine will automatically start ice

making after the sanitize cycle is complete.

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Water Inlet Valve

The water inlet valve normally does not require removal

for de-scaling/sanitizing. Refer to “Water System Checklist”

page 109, if you are troubleshooting water related

problems.

1. When the ice machine is off, the water inlet valve

must completely stop water flow into the machine.

Watch for water flow.

When the ice machine is on, the water inlet valve must

allow the proper water flow through it. Press the power

button to energize the ice machine. Watch for water

flow into the ice machine. If the water flow is slow or

only trickles into the ice machine, refer to water system

checklist.

NOTE: The valve can also be energized by navigating to

the service diagnostic menu, selecting control board, then

selecting “enable all relays”.

Warning

Disconnect the electric power to the ice machine and

dispenser at the electric service switch box and turn off

the water supply before proceeding.

Water Dump Valve

The water dump valve does not require removal for de-

scaling/sanitizing. To determine if removal is necessary:

1. Locate the water dump valve.

2. While the ice machine is in the freeze mode, check

the drain to determine if the dump valve is leaking. If

there is no or little water in the water trough (during

the freeze cycle) the dump valve is leaking.

A. If the dump valve is leaking and debris is not

visible and easily removed, the dump valve must

be replaced.

B. If the dump valve is not leaking, do not remove

it. Instead, follow the “Ice Machine De-scaling

Procedure”.

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Remedial De-scaling Procedure

This procedure will de-scale the components in the water

flow path, and is used to de-scale the ice machine between

the bi-yearly de-scaling and sanitizing procedure.

Ice machine de-scaler is used to remove lime scale and

mineral deposits. Ice machine sanitizer disinfects and

removes algae and slime.

NOTE: Although not required and dependent on your

installation, removing the ice machine top cover may allow

easier access.

1. Ice must not be on the evaporator during the de-

scaling/sanitize cycle. Follow one of the methods

below:

• Press the power switch at the end of a harvest

cycle after ice falls from the evaporator(s).

• Press the power switch and allow the ice to melt.

Notice

Never use anything to force ice from the evaporator.

Damage may result.

2. Open the front panel to access the evaporator.

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3. Press the Clean button and select “Make ice when

complete”. Water will flow through the water dump

valve and down the drain. Wait approximately 1

minute until the water trough refills and the display

indicates Add Chemical. Add the proper amount of

ice machine de-scaler to the water trough by pouring

between the water curtain and evaporator, then

confirm the chemical was added.

Model Amount of De-scaler

IF0300/IT0300/IT0420/IT0620 3 ounces (90 ml)

IT0450/IF0500/IT0500/IF0600

IT0750/IF0900/IT0900/IT1200

5 ounces (150 ml)

IT1500/IT1900 9 ounces (265 ml)

4. Close and secure the front panel. The ice machine

will automatically start ice making after the cycle is

complete (approximately 24 minutes).

NOTE: Once the cycle has started it must complete before

the ice machine can make ice again. Returning it to ice

making mode will not cancel a Clean cycle.

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50 Part Number: 000015430 Rev 04 4/22

Removal from Service/Winterization

General

Special precautions must be taken if the ice machine is to

be removed from service for an extended period of time or

exposed to ambient temperatures of 32°F (0°C) or below.

Notice

If water is allowed to remain in the ice machine in freezing

temperatures, severe damage to some components

could result. Damage of this nature is not covered by the

warranty.

Follow the applicable procedure below.

AIRCOOLED ICE MACHINES

1. Turn off the ice machine by pressing the Power

Button.

2. Turn off the water supply.

3. Remove the water from the water trough.

4. Disconnect and drain the incoming ice-making water

line at the rear of the ice machine.

5. Energize the ice machine and wait one minute for the

water inlet valve to open - or - Energize all relays in

the touchscreen service menu.

6. Blow compressed air in both the incoming water and

the drain openings in the rear of the ice machine until

no more water comes out of the water inlet lines or

the drain.

7. Disconnect the electric power at the circuit breaker or

the electric service switch.

8. Make sure water is not trapped in any of the water

lines, drain lines, distribution tubes, etc.

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WATERCOOLED ICE MACHINES

1. Perform steps 1-6 under “Air-Cooled Ice Machines”.

2. Disconnect the incoming water and drain line from

the water-cooled condenser.

3. Start the ice making cycle by pressing the Power

button and wait for the freeze cycle. The increasing

refrigerant pressure will open the water regulating

valve.

4. Blow compressed air through the condenser until no

water remains.

5. Turn off ice machine by pressing the Power button

and then disconnecting power to the ice machine.

6. Perform a lock out tag out procedure.

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THIS PAGE INTENTIONALLY LEFT BLANK

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Power Button Lock/Unlock Screen Cleaning Button

Touchscreen Features

The Indigo® NXT control panel offers a series of pressure-

sensitive buttons and an interactive touchscreen.

Buttons

Power Button: Provides On/Off functions for the ice

machine.

Lock/Unlock Button: Allows or prevents touchscreen

navigation.

Cleaning Button: Initiates a cleaning cycle. Refer to

“Detailed De-scaling and Sanitizing” on page 37 for

details.

NOTE: Touchscreen is to be activated with finger tips only.

Operation

MAKING

ICE

11/18/2018 10:42 AM

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54 Part Number: 000015430 Rev 04 4/22

Touchscreen

Home screen allows viewing of ice

machine status, alerts and messages.

Navigation with the touchscreen

provides access to menu items,machine

information, settings and alert logs.

Setup and Energy Saver settings can be

adjusted along with access to service

and troubleshooting information. The

icons provide status indication and

allow navigation by pressing the icon.

Prior to Revision 9 software: The

touchscreen will display Program

Mode On, whenever the ice machine

is off due to a bin level probe, weight

program or time program.

Revision 9 software - The touchscreen

will display a Making Ice button with

a Green outer ring during ice making;

A Machine Off button with an Orange

outer ring whenever the ice machine

has turned off on either Time, Weight

or Night Off; An Ice Now Bypass

Program button with a Light Blue/Dark

Blue outer ring, that allows immediate

ice production regardless of ice

program settings.

MAKING

ICE

11/18/2018 10:42 AM

The touchscreen will display a lock

in place of the menu icon when the

touchscreen has been locked.

MAKING

ICE

11/18/2018 10:42 AM

Program

Mode On

11/18/2018 10:42 AM

MAKING

ICE

11/18/2018 10:42 AM

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HOME SCREEN ICON DESCRIPTIONS

Icon Description

Home Screen The center portion of the screen which displays

the current condition of the ice machine -

Making ice, bin full, program mode or machine

off.

Alert Alert icon with number of messages. Pressing

this icon will display the alert log which will

allow viewing and resetting of alerts.

Message Message icon with umber of messages. Pressing

this icon will display the routine maintenance

reminder screen which will allow viewing and

resetting of the reminder.

Menu Menu icon will take you to the main menu.

NOTE: This icon changes to a lock if the

touchscreen lock has been selected.

Information Information icon provides model and serial

number, installation date and other information

specific to the ice machine.

Service

Locater

Provides contact information for your local

service support - Default is the Manitowoc Ice

website service locater.

Lock/Unlock Indicates if screen is locked or unlocked.

The icon is only visible when the screen is

locked.

LuminIce® Only visible when a LuminIce® II accessory is

connected.

Blue S - Normal operation

Red S - Replace bulb

Red/Blue alternating - Incorrect bulb installed

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Icon Description

iAuCS This icon appears when the iAuCS activates

during a programed cleaning cycle.

Making Ice This icon with a green ring appears after the ice

machine has been programmed to run either by

time, weight or night off.

Machine Off This icon with an orange ring appears after the

ice machine has been turned off by either time,

weight or night off program.

Ice Now This icon with a light blue/dark blue ring allows

immediate ice production regardless of ice

program settings.

Green Power

Button

This icon appears if the machine shuts off on

Long Freeze or Long Harvest. To restart the

machine press the Green Power Button on the

diplay or by recycling power. This can only be

done three times in a 24 hour period.

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Setup Wizard

Screens will automatically advance after a selection is

made or press the arrows to advance/go back one screen.

All settings can be accessed and changed without the

wizard by using menu screen navigation.

Setup Description

Press Power

Button

The power button (ON/OFF) is used

to start/stop ice making.

Select

Language

Default is English.

Scroll to select a different language.

Start Wizard

Setup wizard will guide ice machine

programming.

Date and Time

Configuration

Select Month/Day/Year or Day/Month/Year.

Select 12 hour or 24 hour time format.

Set Local Time Use arrows to set local time.

Verify Date Use arrows to set date for your location.

Accessory

Detection

Detects if Ice Level Sensor,

LuminIce® II or iAuCS are connected.

Checkmark = yes - X = no

USB Setup

Only used when setup features have been

transferred to a USB drive. Skip screen by

selecting right arrow.

Units Select standard or metric.

Brightness

Configure screen brightness during normal

operation.

Ice Program

Program ice machine run times or press right

arrow to skip this setup.

Cleaning

Reminder

Set de-scale and sanitize reminder or press

right arrow to skip.

iAuCS* Set frequency of operation.

Air Filter Set to ON for self-contained air-cooled models.

Water Usage

Factory default

- or -

Use less water for reverse osmosis systems

(Refer to “Reverse Osmosis or Deionized Water

Usage” on page 148)

- or -

Use more water to improve clarity for

unfiltered water.

Water Filter* Select Yes or No, set reminder interval

LuminIce II* 12 month reminder is auto-set.

Wizard

Complete

Press right arrow or home icon to return to

home screen.

* - Indicates optional accessory, when detected

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Menu Navigation Overview

SETTINGS MENU SCREEN NAVIGATION

Select SETTINGS Icon from the Home Screen to access

Main Menu screen. The main menu screen contains four

main headings, which allow access to subheadings under

each main heading.

Energy

Ice Program

Continuous Mode - Default, No Program

Time Program - Select Daily On/Off times

Weight Program - Select Daily Production Weight

Night Off Program - Select Night Off/On times

Water Usage

Use Factory Default

Use Less Water With Reverse Osmosis

Use More Water To Improve Ice Clarity

Statistics

Ice Production - Previous 7 Days

Water Usage - Previous 7 Days

Energy Usage - Previous 7 Days

NOTE: The performance statistics are calculated based on

the performance of the ice machine at 90°F (32°C) ambient

temperature and 70°F (21°C) water temperature. The

actual statistics will vary dependent on your environmental

conditions.

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Service

Data

Real Time Data

Time and Temperature

Inputs

Outputs

Data History for 5 Previous Days

Minimum and Maximum Freeze (Length, Time of day,

Thermistor Temperatures)

Minimum and Maximum Harvest (Length, Time of day,

Thermistor Temperatures)

Lifetime Data History

Installation Date

Control Board Replacement Date

Control Board Manufacture Date

Runtime

Cycle Count

Potable Water

Clean Cycles

Alert Log

Lists/Clears Alerts

Manual Harvest

Off or On

Control Board Replacement

Manual Replacement

Manually enter model number

Manually enter serial number

Manually enter condenser serial number (optional)

Verification

USB Replacement

Import to ice machine

Export to USB

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60 Part Number: 000015430 Rev 04 4/22

Service

Diagnostics

Control board

Enable All Relays

Self Check

Temperature Sensors

Lists Sensor Temperatures

Inputs

Lists Control Board Input Information

User Interface

Screen Calibration

Button Diagnostics

Screen Diagnostics

Screen Calibration

Contact information

Factory defaults to QR code and website address to

Manitowoc Ice’s Global Locator.

Edit Contact Information Button.

USB

Upgrade Firmware

Export Data

iAuCS

Manually initiate the iAuCS pump for pump/hose

priming. NOTE: The clean button does not initiate the

iAuCS pump.

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Part Number: 000015430 Rev 04 4/22 61

Settings

Language

Select Language

Reminders

Clean Reminder

Set Month Interval

Air Filter

Set On/Off/Interval

Water Filter

Set Reminder

Configure Date & Time

Set Time

Set Date

Units

Standard or Metric

Brightness

Adjust Touch Screen Brightness For Sleep Mode or

Inactivity.

NOTE: 100% brightness is activated by touching the

screen when the lock feature is off.

USB

Import Settings To Ice Machine

Export Settings To USB

iAuCS

When the iAuCS is detected, the icon will appear in the

settings menu to set frequency of cleanings with iAuCS

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62 Part Number: 000015430 Rev 04 4/22

Reset Defaults

Require Setup Wizard

Optional Setup Wizard restart for training purposes

or resale of equipment.

Backup Current Settings

Import To Ice Machine

Export To USB

Reset Factory Defaults

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Part Number: 000015430 Rev 04 4/22 63

Operational Checks

GENERAL

Manitowoc ice machines are factory-operated and

adjusted before shipment. Normally, new installations do

not require any adjustment.

To ensure proper operation, always follow the Operational

Checks:

• when starting the ice machine for the first time

• after a prolonged out of service period

• after cleaning, de-scaling and sanitizing

NOTE: Routine adjustments and maintenance procedures

are not covered by the warranty.

Important

Refrigeration compressors must be operated for a

minimum break in period of 24 hours before full ice

production will be reached.

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64 Part Number: 000015430 Rev 04 4/22

ICE THICKNESS CHECK

The ice thickness probe is factory-set to maintain the ice

bridge thickness at 1/8" (3 mm).

NOTE: Make sure the water curtain/splash shields are in

place when performing this check. It prevents water from

splashing out of the water trough. Remove the curtain to

make an adjustment, then replace immediately after the

adjustment is made.

1. Inspect the bridge connecting the cubes. It should be

1/8" (3 mm) thick.

2. If adjustment is necessary, turn the ice thickness

probe adjustment screw clockwise to increase bridge

thickness or counterclockwise to decrease bridge

thickness. Set a 9/32" gap between the ice thickness

probe and evaporator as a starting point. Then adjust

to achieve 1/8" ice thickness.

3. Make sure the ice thickness probe wire and the

bracket do not restrict movement of the probe.

1/8" (3 mm)

ICE BRIDGE THICKNESS

PLACE 9/32" (7 mm) DRILL BIT

HERE TO SET INITIAL GAP

Ice Thickness Check

NOTE: Turning the adjustment 1/3 of a turn will change the

ice thickness about 1/16" (1.5 mm). Make adjustment only

when the ice machine is off to prevent initiating a harvest.

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Part Number: 000015430 Rev 04 4/22 65

Control Board Timers

The control board has the following non-adjustable timers:

• The ice machine is locked into the freeze cycle for 6

minutes before the ice thickness probe can initiate a

harvest cycle.

• The maximum freeze time is 35 minutes at which time

the control board automatically initiates a harvest

sequence.

• The maximum harvest time is 7 minutes, the control

board will preform a Thaw Cycle and then return the

ice machine to the freeze cycle.

• Maximum water fill time in the freeze cycle:

• Single evaporator 6 minutes.

• Dual evaporator 8 minutes.

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66 Part Number: 000015430 Rev 04 4/22

Sequence of Operation

SELF CONTAINED AIR OR WATER COOLED

NOTE: The power button must be depressed and the water

curtain/ice dampers must be in place on the evaporator

before the ice machine will start.

Initial Start-Up or Start-Up After Automatic Shut-Off

1. Water Purge

Before the compressor starts, the water pump and water

dump solenoid energize to purge the ice machine of old

water. This feature ensures that the ice making cycle starts

with fresh water.

2. Refrigeration System Equalization and Start-Up

The harvest valve(s) and air pump(s) energize to equalize

high and low side refrigeration pressure.

After 5 seconds the contactor energizes the compressor

and supplies power to the condenser fan motor. After 5

seconds the harvest valve(s) and air pump(s) de-energize.

NOTE: The fan motor is wired through a fan cycle pressure

control. When the discharge pressure exceeds the cut in

pressure the fan cycle switch closes and energizes the fan

motor.

Freeze Sequence

3. Prechill

The compressor is on for 30 seconds (120 seconds initial

cycle) to lower the temperature of the evaporator(s)

before the water pump is energized. The water fill valve

will energize and remain on until water touches the low

and high, water level probes for 5 seconds.

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Part Number: 000015430 Rev 04 4/22 67

4. Freeze

Water Pump

The water pump(s) energizes and water flows over the

evaporator. The water pump is energized throughout the

freeze cycle.

Water Inlet Valve

The water inlet valve energized in prechill. After water

contacts the low and high water probes the water fill valve

de-energizes. Ice builds on the evaporator and the water

level drops. When water loses contact with the high water

probe, the water fill valve energizes until water contacts

the high water probe again.

NOTE: After the second fill the water valve relay is locked

out.

Maximum Fill Time = Prechill fill time + first fill + second fill.

SINGLE EVAPORATOR MAXIMUM FILL TIME

Initial startup or startup after automatic shutoff

Prechill (2 minutes) + first fill time (6 minutes) + second fill

time (6 minutes) = 14.0 minutes.

Consecutive cycles

Prechill (30 sec.) + first fill time (6 minutes) + second fill

time (6 minutes) = 12.5 minutes.

DUAL EVAPORATOR MAXIMUM FILL TIMES

Initial startup or startup after automatic shutoff

Prechill (2 minutes) + first fill time (8 minutes) + second fill

time (8 minutes) = 18.0 minutes.

Consecutive cycles

Prechill (30 sec.) + first fill time (8 minutes) + second fill

time (8 minutes) = 16.5 minutes.

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Ice Thickness Probe

The freeze cycle continues until the six minute freeze lock

expires and enough ice has formed to send a signal from

the ice thickness probe to the control board.

During the first 6 minutes of the freeze cycle the ice

thickness probe microphone samples ambient noise.

6 minutes into the freeze cycle baseline readings are

recorded. Ice formation on the evaporator will change

the readings; when the baseline readings are exceeded a

harvest cycle starts.

Harvest Sequence

5. Water Purge

The air pump(s) (when used) and the harvest valve(s) open

at the beginning of the water purge to divert discharge

refrigerant gas into the evaporator.

The water pump(s) continues to run, and the water dump

valve energizes to purge any remain water in the water

trough down the drain.

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Part Number: 000015430 Rev 04 4/22 69

6. Harvest

The air pump (when used) remains energized and the

harvest valve(s) remains open. The refrigerant gas warms

the evaporator causing the cubes to slide, as a sheet, off

the evaporator and into the storage bin. If the damper/

curtain does not open within 3.5 minutes in the harvest

cycle the following occurs:

• 3.5 minutes - The water inlet valve energizes until

water touches the high water level probe.

• 4 minutes - The water pump energizes.

• 6.5 to 7 minutes - The water dump valve energizes.

When the sliding sheet of cubes opens and closes within

30 seconds the bin switch terminates the harvest sequence

and returns the ice machine to the freeze sequence

(step 3 - 4).

NOTE: If bin switch does not open before 7 minutes the ice

machine will start a Thaw Cycle - Refer to “Thaw Cycle” on

page 86 for details.

Automatic Shut-Off

7. Automatic Shut-Off

When the storage bin is full at the end of a harvest

sequence, the sheet of cubes fails to clear the water

curtain/ice damper and will hold it open. After the water

curtain/ice damper is held open for 30 seconds, the ice

machine shuts off. The ice machine remains off for 3

minutes before it can automatically restart.

The ice machine remains off until enough ice has been

removed from the storage bin to allow the ice to fall clear

of the water curtain or all of the ice dampers. As the water

curtain/ice dampers swing back to the closed position, the

bin switch re-closes and the ice machine restarts (steps 1 -

2), provided the 3 minute delay period is complete.

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70 Part Number: 000015430 Rev 04 4/22

ENERGIZED PARTS CHART SELF CONTAINED AIR OR WATERCOOLED MODELS

Ice Making Sequence

of Operation

Water

Pump

Harvest

Valve(s)

Air

Pump(s)*

Water Inlet

Valve

Water

Dump

Valve

Contactor

Coil

Compressor

Condenser

Fan Motor

Length of Time

Initial Start-Up

1. Water Purge

On Off Off Off On Off Off Off

45 Seconds

2. Pressure Equalization

Off On On Off Off Off Off Off

5 Seconds

3. Compressor Startup Off On On Off Off On On Off 5 Seconds

Freeze Sequence

4. Prechill

Off Off Off

May Cycle

On/Off

Off On On

May Cycle

On/Off

Initial Start-Up

is 120 Seconds

30 Seconds

thereafter

5. Freeze

On Off Off

Cycle On/

Off

Off On On

May Cycle

On/Off

Until Ice

Contact w/

Ice Thickness

Probe

Harvest Sequence

6. Water Purge

On On On Off Off On On

May Cycle

On/Off

Factory Set at

45 Seconds

7. Harvest

Off On On Off Off On On

May Cycle

On/Off

Bin Switch

Activation

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Part Number: 000015430 Rev 04 4/22 71

Ice Making Sequence

of Operation

Water

Pump

Harvest

Valve(s)

Air

Pump(s)*

Water Inlet

Valve

Water

Dump

Valve

Contactor

Coil

Compressor

Condenser

Fan Motor

Length of Time

Thaw Cycle

Starts 3.5 minutes in

harvest cycle

Off On On On Off On On

May Cycle

On/Off

Until Water

Contact w/

Water Level

Probe

Thaw Cycle

Starts 4 minutes in harvest

cycle

On On On Off Off On On

May Cycle

On/Off

Bin Switch

Activation or 7

minutes

Thaw Cycle

Dump valve energizes at

6.5 minutes in harvest

cycle

On On On Off Off On On

May Cycle

On/Off

Bin Switch

Activation or 7

minutes

8. Automatic Shut-

Off

Off Off Off Off Off Off Off Off

**Until 3

Minute Delay

Expires and

Bin Switch Re-

closes

* Not used on all models

** A thaw will start when the bin switch does not open within 7 minutes of the start of a harvest cycle.

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REMOTE CONDENSER

NOTE: The power button must be depressed and the water

curtain/ice dampers must be in place on the evaporator

before the ice machine will start.

Initial Start-Up or Start-Up After Automatic Shut-Off

1. Water Purge

Before the compressor starts, the water pump and water

dump solenoid are energized for 45 seconds, to completely

purge the ice machine of old water. This feature ensures

that the ice making cycle starts with fresh water.

2. Refrigeration System Equalization and Start-Up

The harvest valve, air pump(s) and harvest pressure

regulating (HPR) solenoid valves energize to equalize high

and low side refrigeration pressure.

After 5 seconds the liquid line solenoid valve energizes and

the contactor energizes the compressor and condenser fan

motor.

Freeze Sequence

3. Prechill

The compressor is on for 30 seconds (120 seconds initial

cycle) to lower the temperature of the evaporator(s)

before the water pump is energized. The water fill valve

will energize and remain on until water touches the low

and high water level probes.

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4. Freeze

Water Pump

The water pump(s) energizes and water flows over the

evaporator. The water pump is energized throughout the

freeze cycle.

Water Inlet Valve

The water inlet valve energized in prechill. After water

contacts the low and high water probes the water fill valve

de-energizes. Ice builds on the evaporator and the water

level drops. When water loses contact with the high water

probe, the water fill valve energizes until water contacts

the high water probe again.

Maximum Fill Time = Prechill fill time + first fill + second fill.

SINGLE EVAPORATOR MAXIMUM FILL TIME

Initial startup or startup after automatic shutoff

Prechill (2 minutes) + first fill time (6 minutes) + second fill

time (6 minutes) = 14.0 minutes.

Consecutive cycles

Prechill (30 sec.) + first fill time (6 minutes) + second fill

time (6 minutes) = 12.5 minutes.

DUAL EVAPORATOR MAXIMUM FILL TIMES

Initial startup or startup after automatic shutoff

Prechill (2 minutes) + first fill time (8 minutes) + second fill

time (8 minutes) = 18.0 minutes.

Consecutive cycles

Prechill (30 sec.) + first fill time (8 minutes) + second fill

time (8 minutes) = 16.5 minutes.

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Ice Thickness Probe

The freeze cycle continues until the six minute freeze lock

expires and enough ice has formed to send a signal from

the ice thickness probe to the control board.

During the first 6 minutes of the freeze cycle the ice

thickness probe microphone samples ambient noise.

6 minutes into the freeze cycle 4 baseline readings are

recorded. Ice formation on the evaporator will change

the readings; when two of the four baseline readings are

exceeded a harvest cycle starts.

Harvest Sequence

5. Water Purge

The air pump (when used) the harvest valve(s) and

harvest pressure regulating valve (HPR) energize to divert

refrigerant gas to the evaporator.

The water pump continues to run, and the water dump

valve energizes to purge the water in the water trough.

6. Harvest

The harvest valve, air pump(s) and harvest pressure

regulating (HPR) solenoid valves remain energized and the

refrigerant gas warms the evaporator causing the cubes to

slide, as a sheet, off the evaporator and into the storage

bin. If the damper/curtain does not open within 3.5

minutes in the harvest cycle the following occurs:

• 3.5 minutes - The water inlet valve energizes until

water touches the high water level probe.

• 4 minutes - The water pump energizes.

• 6.5 to 7 minutes - The water dump valve energizes.

When the sliding sheet of cubes opens and closes within

30 seconds the bin switch terminates the harvest sequence

and returns the ice machine to the freeze sequence (step

3 - 4).

NOTE: If bin switch does not open before 7 minutes the ice

machine will start a Thaw Cycle - Refer to “Thaw Cycle” on

page 86 for details.

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Part Number: 000015430 Rev 04 4/22 75

Automatic Shut-Off

7. Automatic Shut-Off

When the storage bin is full at the end of a harvest

sequence, the sheet of cubes fails to clear the water

curtain/ice damper and will hold it open. After the water

curtain/ice damper is held open for 30 seconds, the ice

machine shuts off. The ice machine remains off for 3

minutes before it can automatically restart.

The ice machine remains off until enough ice has been

removed from the storage bin to allow the ice to fall clear

of the water curtain or all of the ice dampers. As the water

curtain/ice dampers swing back to the closed position, the

bin switch re-closes and the ice machine restarts (steps 1 -

2), provided the 3 minute delay period is complete.

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76 Part Number: 000015430 Rev 04 4/22

ENERGIZED PARTS CHART REMOTE AIRCOOLED CONDENSER MODELS

Ice Making

Sequence of

Operation

Water

Pump

Harvest

Valve(s)

HPR

Valve

Air

Pump(s)*

Water Inlet

Valve

Water

Dump

Valve

Contactor Coil

Liquid Line

Solenoid

Compressor

Condenser

Fan Motor

Length of

Time

Initial Start-Up

1. Water Purge On Off Off Off Off On Off Off Off 45 Seconds

2. Pressure

Equalization

Off On On On Off Off Off Off Off 5 Seconds

3. Compressor

Startup

Off On Off On Off Off On On On 5 Seconds

Freeze Sequence

4. Prechill

Off Off Off Off

May Cycle On/

Off during

prechill

Off On On On

Initial Start-

Up is 120

Seconds

30 Seconds

thereafter

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Part Number: 000015430 Rev 04 4/22 77

Ice Making

Sequence of

Operation

Water

Pump

Harvest

Valve(s)

HPR

Valve

Air

Pump(s)*

Water Inlet

Valve

Water

Dump

Valve

Contactor Coil

Liquid Line

Solenoid

Compressor

Condenser

Fan Motor

Length of

Time

5. Freeze On Off Off Off

Cycles Off then

On one more

time

Off On On On

Until Ice

Contact

w/Ice

Thickness

Probe

Harvest

Sequence

6. Water Purge

On On On On Off On On On On

Factory

Set at 45

Seconds

7. Harvest Off On On On Off Off On On On

Bin Switch

Activation

Thaw Cycle

Starts 3.5 minutes

in harvest cycle

Off On On On On Off On On On

Until Water

Contact w/

Water Level

Probe

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78 Part Number: 000015430 Rev 04 4/22

Ice Making

Sequence of

Operation

Water

Pump

Harvest

Valve(s)

HPR

Valve

Air

Pump(s)*

Water Inlet

Valve

Water

Dump

Valve

Contactor Coil

Liquid Line

Solenoid

Compressor

Condenser

Fan Motor

Length of

Time

Thaw Cycle

Water pump

energizes at 4

minutes in harvest

cycle

On On On On Off Off On On On

Bin Switch

Activation

or 7 minutes

Thaw Cycle

Dump valve

energizes at 6.5

minutes in harvest

cycle

On On On On Off On On On On

Bin Switch

Activation

or 7 minutes

8. Automatic

Shut-Off

Off Off Off Off Off Off Off Off Off

**Until

3 Minute

Delay

Expires and

Bin Switch

Re-closes

* Not used on all models

** A Thaw Cycle will start when the bin switch does not open within 7 minutes of the start of a harvest cycle.

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Part Number: 000015430 Rev 04 4/22 79

Troubleshooting

Check the touchscreen for alerts - An alert icon with the

number of messages will be displayed if alerts are present.

Pressing the alert icon will display the alert log which will

allow viewing and resetting of alerts. Refer to the alert log

on the following pages for a description of the event.

NOTE: There are two sequences that allow the ice machine

to continue ice making during alert events:

Thaw Cycle

When the damper/curtain does not open during the

7 minute harvest cycle (E02 fault) a thaw cycle starts.

See “Thaw Cycle” on page 86

Safe Operation Mode

Allows the ice machine to operate up to 72 hours if the

ice thickness probe (E19 fault) and/or water level probe

sensors fail (E20 fault).

See “Safe Operation Mode” on page 87

Troubleshooting

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ALERT LOG

Refer to “Alert Log Detail” For Code descriptions.

Displayed Text Code Description

Long Freeze E01 Long Freeze Cycle

Long Harvest E02 Long Harvest Cycle

Power Loss E03 Input Power Loss

Hi cnd Temp or

Wtr Cnd Fault

E04 High Condenser Temperature

HPC Fault E05 High Pressure Control Opened

E06 Spare

Starving TXV E07 Starving TXV Single Evaporator or Low On

Charge

TXV Fault E08 TXV Fault Single or Dual Circuit

Evaporators

Flood Evap1 E09 Flooding Evaporator Fault Single

Evaporator, Single Circuit

Flood Evap2 E10 Flooding Evaporator Fault Dual TXV, Dual

Circuit

Refrig Fault E11 Refrigeration Fault

Curtain Fault E12 Curtain Switch Fault - Open more than

24 hours

E13 Spare

E14 Spare

Low liq temp E15 Fan Cycle Control Fault - Low Liquid Line

Temperature

Rmt Cnd Fault E16 Remote Condensing Unit Fault (CVD Only)

E17 Spare

E18 Spare

ITP Fault E19 Ice Thickness Probe Fault

WTR Fault E20 Water System Fault

T1 Fault E21 T1 Temperature Sensor Issue

T2 Fault E22 T2 Temperature Sensor Issue

T3 Fault E23 T3 Temperature Sensor Issue

T4 Fault E24 T4 Temperature Sensor Issue

Bin Probe Fault E25 Bin Level Probe Low Sensor Fault

T6 or T7 Fault E26 T6 or T7 Temperature Sensor Issue

T6 or T7 Fault E27 T6 or T7 Temperature Sensor Issue

iAUCS E28 iAuCS

USB COMM E29 USB Communication Fault

USB DNLD E30 USB Download Fault

Safe Mode E31 Safe Mode

RS485 COMM E32 RS485 Communication Fault

Keyboard E33 Touchscreen Fault

Display E34 Display Fault

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Part Number: 000015430 Rev 04 4/22 81

Displayed Text Code Description

Checksum E36 Check Sum Error

WatchDog E37 Watch Dog Alert

UI Comm E38 UI Comm Alert

ALERT LOG DETAIL

E01 Long Freeze

3 consecutive 35 minute freeze cycles = Ice machine is off.

E02 Long Harvest

3 consecutive 7minute harvest cycles = Ice machine is off.

E03 Power Loss

When power is interrupted to the ice machine the control

board will log the alert in the ELOG and stamp the loss of

power on power-up.

E04 High Condenser Temperature

Liquid Line Temperature too High for Self-contained Air

Cooled Ice machine = Air Cooled Condenser Fault

Liquid Line Temperature too High for Self-contained Water

Cooled ice machine = Water Cooled Condenser Fault

E05 High Pressure Control Opened

The high pressure cutout switch (HPCO) opened.

E06 Spare

E07 Starving TXV Single Evaporator or Low On Charge

The difference of the average evaporator inlet (T3) and

outlet (T4) is greater than 12°F in the last 1 minute of the

freeze cycle.

E08 TXV Fault Single or Dual Circuit Evaporators

The difference of the average evaporator inlet (T3) and

outlet (T4) is greater than 12°F in the last 1 minute of the

freeze cycle.

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E09 Flooding Evaporator Fault Single Evaporator, Single

Circuit

Average compressor discharge line temperature during

the first 6 minutes of the freeze cycle (T2) compared to the

average of the Prechill (T1) +50°F is less than 1.05°F.

E10 Flooding Evaporator Fault Dual TXV, Dual Circuit

Average compressor discharge line temperature during

the first 6 minutes of the freeze cycle (T2) compared to the

average of the Prechill (T1) +50°F is less than 1.05°F.

E11 Refrigeration Fault

The compressor discharge temperature did not increase

by at least 10° F, and the evaporator temperature did not

decreased by at least 10° F - Measured from Refrigeration

Start up or Prechill until 2 minutes into the Freeze cycle.

E12 Curtain Switch Fault Open more than 24 hours

The ice machine is set to ice making and remains in bin

full condition for more than 24 hours. The curtain switch is

open or curtain is off.

E13 Spare

E14 Spare

E15 Fan Cycle Control Fault - Low Liquid Line Temperature

The liquid line temperature dropped below 60° F for more

than one continuous minute during the freeze cycle.

E16 Remote Condensing Unit Fault (CVD Only)

The liquid line temperature dropped below 40° F, or

exceeded 140° F for more than 1 continuous minute during

the freeze cycle.

E17 Spare

E18 Spare

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Part Number: 000015430 Rev 04 4/22 83

E19 Ice Thickness Probe Fault

The monitored Frequencies is out of the appropriate range

(probe unplugged or problem with microphone).

E20 Water System Fault

Any of the following:

1. Sensing high water probe and not low water probe.

2. Evaporator outlet temperature is less than -10°F 6.5

to 7.5 minutes in freeze cycle.

3. Low water probe is satisfied at the end of harvest.

4. Low or high water probe is satisfied at end of freeze

cycle.

E21 T1 Temperature Sensor Issue

During Pre-chill the thermistor had an average value

reading outside the valid range.

E22 T2 Temperature Sensor Issue

During Pre-chill the thermistor had an average value

reading outside the valid range.

E23 T3 Temperature Sensor Issue

During Pre-chill the thermistor had an average value

reading outside the valid range.

E24 T4 Temperature Sensor Issue

During Pre-chill the thermistor had an average value

reading outside the valid range.

E25 Bin Level Probe Low Sensor Fault

The thermistor had an average value reading outside of

the valid range for 10 continuous minutes.

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84 Part Number: 000015430 Rev 04 4/22

E26 T6 or T7 Temperature Issue

The thermistor had an average value reading outside of

the valid range.

E27 T6 or T7 Temperature Issue

The thermistor had an average value reading outside of

the valid range.

E28 iAuCS

When the iAuCS clean option is selected from the menu,

the control checks for the presence of the iAuCS board.

When the iAuCS is not connected it will signal an alert

which will clear as soon as the hardware is detected.

E29 USB Communication Fault

USB Communication error; No USB drive in port or

defective USB drive.

E30 USB Download Fault

USB Download error related to USB drive or a defective

USB drive.

E31 Safe Mode

Safe mode allows the ice machine to operate for a period

of time in the event of a Water level or ice thickness probe

failure. The controller allows the machine to operate based

on model data and historical cycle information.

E32 RS485 Communication Fault

The device plugged into the RS485 port is not

communicating between the control board and gateway.

E33 Touchscreen Fault

The touchscreen is not plugged into the control board or

is faulty.

E34 Display Fault

The touchscreen is not plugged into the control board or

is faulty.

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Part Number: 000015430 Rev 04 4/22 85

E36 Check Sum Error

Alert Log Only: Activates on power loss.

E37 Watch Dog Alert

Alert Log Only: Micro Process time out, possible electrical

noise.

E38 UI Comm Alert

Alert Log Only: User interface communication error: loose

communication cable, power interruption.

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THAW CYCLE

When the damper/curtain does not open during the 7

minute harvest cycle the following Thaw Cycle occurs:

• 7 minutes - The compressor, harvest solenoid valve

and dump valve de-energize.

The water pump remains energized and the water inlet

valve energizes until water touches the high water

level probe.

• Water is circulated, dumped and refilled to the high

water level probe 18 times (approximately 1 hour).

Model 1200 or smaller:

Circulate 165 seconds, dump 45 seconds

Model 1400 and larger:

Circulate 240 seconds, dump 120 seconds

• At the end of the thaw cycle (approximately 1 - 1.75

hour) the ice machine will start another freeze cycle.

Curtain Operation In Thaw Cycle Harvest

• Open & close damper = Continue Thaw Cycle

• Open damper 30 seconds = Full Bin Shutoff

Use the keypad and turn the ice machine off and then on

to terminate the cycle. Disconnecting and reconnecting

power to end the cycle will result in the ice machine

restarting in a harvest cycle.

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Part Number: 000015430 Rev 04 4/22 87

SAFE OPERATION MODE

Allows the ice machine to operate up to 72 hours if the

ice thickness probe (E19 fault) and/or water level probe

sensors fail (E20 fault).

• When the control board starts the safe mode, an alert

is flashed on the display to notify the end-user they

have a production problem.

• The control board automatically initiates and monitors

the safe mode. The control will automatically exit the

safe mode if a normal signal is received from the input.

• After 72 consecutive hours the control board will enter

a standby mode and turn off.

NOTE: When the ice machine is first powered up or there

is a power loss and restarted, a water fill time array will be

used in calculating the average of the five cycles.

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E01 LONG FREEZE CYCLE

If the freeze time reaches 35 minutes, the control board

automatically initiates a harvest cycle. If 3 consecutive

35-minute freeze cycles occur, the ice machine stops.

E02 LONG HARVEST CYCLE

If the harvest time reaches 7 minutes, the control board

will start a Thaw Cycle and automatically return the ice

machine to the freeze cycle. After 3 consecutive long

harvest cycles the ice machine stops.

ANALYZING WHY A SERVICE FAULT E01 & E02

STOPPED THE ICE MACHINE

Service Faults are designed to stop the ice machine prior

to major component failures, most often a minor problem

or something external to the ice machine. This may be

difficult to diagnose, as many external problems occur

intermittently.

Example: An ice machine stops intermittently on Service

Fault (long freeze times). The problem could be a low

ambient temperature at night, a water pressure drop, the

water is turned off one night a week, etc.

Refrigeration and electrical component failures will cause

a Service Fault trip. Eliminate all electrical components

and external causes first. If it appears that the refrigeration

system is causing the problem, use Manitowoc’s Freeze

Cycle Refrigeration System Operational Analysis Table,

along with detailed charts, checklists, and other references

to determine the cause.

The following checklists are designed to assist the service

technician in analysis. However, because there are many

possible external problems, do not limit your diagnosis to

only the items listed.

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Part Number: 000015430 Rev 04 4/22 89

E01 LONG FREEZE

Freeze time exceeds 35 minutes for 3 consecutive freeze

cycles.

Possible cause checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Water System

• Dirty/defective water level probe

• Low water pressure (20 psig min.)

• High water pressure (80 psig max.)

• High water temperature (90°F/32.2°C max.)

• Clogged water distribution tube

• Dirty/defective water fill valve

• Dirty/defective water dump valve

• Defective water pump

• Loss of water from sump area

Electrical System

• Low incoming voltage

• Ice thickness probe out of adjustment

• Harvest cycle not initiated electrically

• Contactor not energizing

• Compressor electrically non-operational

• Defective fan cycling control

• Defective fan motor

Miscellaneous

• Non-Manitowoc components

• Improper refrigerant charge

• Defective head pressure control

• Defective harvest valve

• Defective compressor

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• TXV starving or flooding (check bulb mounting)

• Non-condensible in refrigeration system

• Plugged or restricted high side refrigerant lines or

component

• Restricted air flow/dirty condenser fins

• High inlet air temperature

• Condenser discharge air recirculation

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Part Number: 000015430 Rev 04 4/22 91

E02 LONG HARVEST

Harvest time exceeds 7 minutes for 3 consecutive harvest

cycles.

Possible Cause Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Water System

• Water area (evaporator) dirty

• Dirty/defective water dump valve

• Vent tube not installed on water outlet drain

• Water freezing behind evaporator

• Plastic extrusions and gaskets not securely mounted to

the evaporator

• Clogged water distribution tube

Electrical System

• Ice thickness probe out of adjustment

• Bin switch closed/defective

• Premature harvest - The control board initiates a

harvest cycle when the high water level probe circuit is

complete and the low water level probe is open.

Refrigeration System

• Non-Manitowoc components

• Improper refrigerant charge

• Defective head pressure control valve

• Defective harvest valve

• TXV flooding (check bulb mounting)

• Defective fan cycling control

• Water cooled only - Water regulating valve is

incorrectly adjusted or will not close during harvest

cycle.

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Troubleshooting By Symptom

The troubleshooting procedures follow diagnostic charts.

There are four symptoms, the symptom that you are

experiencing will determine which diagnostic chart to

use. The chart asks yes and no questions to determine

the problem. The diagnostic chart will direct you to a

procedure to correct the problem. Remote condenser, and

self contained models use separate charts.

SYMPTOM #1

Ice Machine Stops Running

Ice machine is in Ice Making cycle

Has a History of Shutting Down

• Refer to Ice Machine Stops Running diagnostic chart

SYMPTOM #2

Ice Machine has a Long Freeze Cycle

Ice Formation is Thick

Thin Ice Fill on Inlet or Outlet of Evaporator

Low Production

Service Fault (possible)

• Refer to Freeze Cycle Refrigeration System Operational

Analysis Table

SYMPTOM #3

Ice Machine Will Not Harvest - Freeze Cycle is Normal and

Ice Cubes are Not Melted After Harvest

Long Harvest (possible)

• Refer to Refrigeration Harvest Flow Chart

SYMPTOM #4

Ice Machine Will Not Harvest - Freeze Cycle is Normal and

Ice Cubes are Melted After Harvest

• Refer to Ice Meltout Flow Chart

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Part Number: 000015430 Rev 04 4/22 93

RESET TO FACTORY DEFAULTS

Before starting troubleshooting procedures, reset the

control board to factory defaults to prevent

mis-diagnosis. Before resetting to factory defaults do one

of the following:

A. Copy settings to a USB device and flash settings

into the control board when diagnostics are

complete.

B. Write down any customer settings so they can be

re-entered when diagnostics are complete.

To reset the ice machine to factory defaults

select Menu then Reset Defaults.

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SYMPTOM #1  ICE MACHINE WILL NOT RUN

Micro light ﬂashing?

Yes

START

Is the display interface

energized and funconing?

Yes

Refer to display & control

board diagnoscs

Is there an Alert or

Error Logged?

Refer to Alert/Error

Log

Yes

Does the ice machine start

when the Power buon is pushed?

Yes

Are there any lights

on or ﬂashing on the

control board?

Refer to display & control

board diagnoscs

Cycle Power to Board,

are lights ﬂashing?

Display light

Flashing?

Unit has

adequate ground?

Install Ground

Yes

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Part Number: 000015430 Rev 04 4/22 95

Yes

Supply power to the

ice machine

Yes

Line voltage at wires

55 & 56 on 9 pin control

board connector?

Control board fuse

is good?

Replace fuse & determine which

component caused fuse to blow

Refer to display & control

board diagnoscs

Bin switch light on?

(Mul evap all lights on?)

All water curtains or

dampers in place?

Install the water curtain/damper

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Press power buon to start

ice making

Is magnet on the

water curtain/damper?

Yes

Replace the water

curtain/damper

Yes

Ice machine starts?

Test run ice machine

Yes

Refer to bin

switch diagnoscs

Refer to display & control

board diagnoscs

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Part Number: 000015430 Rev 04 4/22 97

SYMPTOM #2  LOW PRODUCTION, LONG FREEZE

CYCLE

Ice Machine has a Long Freeze Cycle

Ice Formation is Thick

Thin on Inlet or Outlet of Evaporator

Low Production

How to Use the Freeze Cycle Refrigeration System

Operational Analysis Table

GENERAL

These tables must be used with charts, checklists and

other references to eliminate refrigeration components

not listed on the tables and external items and problems

which can cause good refrigeration components to appear

defective.

The tables list five different defects that may affect the ice

machine’s operation.

NOTE: A low-on-charge ice machine and a starving

expansion valve have very similar characteristics and are

listed under the same column.

NOTE: Before starting, see “Before Beginning Service” for

a few questions to ask when talking to the ice machine

owner.

PROCEDURE

Step 1 Complete the “Operation Analysis” column.

Read down the left “Operational Analysis” column.

Perform all procedures and check all information listed.

Each item in this column has supporting reference material

to help analyze each step.

While analyzing each item separately, you may find an

“external problem” causing a good refrigerant component

to appear bad. Correct problems as they are found. If

the operational problem is found, it is not necessary to

complete the remaining procedures.

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Step 2 Enter Checkmarks ().

Each time the actual findings of an item in the

“Operational Analysis” column matches the published

findings on the table, enter a Checkmark.

Example: Freeze cycle suction pressure is determined to be

low. Enter a Checkmark in the “low” column.

Step 3 Add the Checkmarks listed under each of

the four columns. Note the column number

with the highest total and proceed to “Final

Analysis.”

NOTE: If two columns have matching high numbers,

a procedure was not performed properly, supporting

material was not analyzed correctly or the problem

component is not covered by the analysis table.

Before Beginning Service

Ice machines may experience operational problems

only during certain times of the day or night. A machine

may function properly while it is being serviced, but

malfunctions later. Information provided by the user can

help the technician start in the right direction, and may be

a determining factor in the final diagnosis.

Ask these questions before beginning service:

• When does the ice machine malfunction? (night, day,

all the time, only during the Freeze cycle, etc.)

• When do you notice low ice production? (one day a

week, every day, on weekends, etc.)

• Can you describe exactly what the ice machine seems

to be doing?

• Has anyone been working on the ice machine?

• During “store shutdown,” is the circuit breaker, water

supply or air temperature altered?

• Is there any reason why incoming water pressure

might rise or drop substantially?

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SYMPTOM #2  FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES

SINGLE EVAPORATOR, SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER

Operational Analysis 1234

Ice Production

Reference “Ice

Production Check” on

page 106

Air-Temperature Entering Condenser

Water Temperature Entering Ice Machine

Published 24 hour ice production

Calculated (actual) ice production

NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within

10% of charted capacity.

Installation and Water

System

Reference “Water System Checklist” on page 109

All installation and water related problems must be corrected before proceeding with chart.

Ice Formation Pattern

Reference “Ice

Formation Pattern” on

page 110

Ice formation is extremely

thin on outlet of

evaporator

-or-

No ice formation on the

entire evaporator

Ice formation is extremely

thin on outlet of

evaporator

-or-

No ice formation on entire

evaporator

Ice formation normal

-or-

Ice formation is extremely

thin on inlet of evaporator

-or-

No ice formation on entire

evaporator

Ice formation normal

-or-

No ice formation on entire

evaporator

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Operational Analysis 1234

Freeze Cycle

Discharge Pressure

________ _______ ______

1 minute Middle End

into cycle

If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem

checklist to eliminate problems and/or components not listed on this table before proceeding.

Freeze Cycle

Suction Pressure

________ _______ ______

1 minute Middle End

into cycle

If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist

page 117 to eliminate problems and/or components not listed on this table before proceeding.

Suction pressure is

High

Suction pressure is

Low or Normal

Suction pressure is

High

Suction pressure is

High

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Part Number: 000015430 Rev 04 4/22 101

Operational Analysis 1234

Wait 5 minutes into the freeze cycle.

Compare temperatures of

evaporator inlet and evaporator

outlet.

Inlet T3 ____________°F (°C)

Outlet T4 __________ °F (°C)

Difference

T3 & T4 ____________ °F (°C)

Reference “Comparing Evaporator

Inlet and Outlet Temperatures -

Self-contained & Remote Condenser

Single Expansion Valve Machines” on

page 120

Inlet and outlet

within 7°F (4°C)

of each other

Inlet and outlet

not within 7°F (4°C)

of each other

-and-

Inlet is colder than

outlet

Inlet and outlet

within 7°F (4°C)

of each other

-or-

Inlet and outlet

not within 7°F (4°C)

of each other

-and-

Inlet is warmer than

outlet

Inlet and outlet

within 7°F (4°C)

of each other

Final Analysis

Enter total number of boxes checked

in each column.

Reference “Final Analysis - Self-

contained Air, Water & Remote

Condenser Models” on page 125

Harvest Valve

Leaking

Low On Charge

-or-

TXV Starving

TXV Flooding Compressor

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SINGLE EVAPORATOR, DUAL EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER

Operational Analysis 1 2 3 4

Ice Production Air-Temperature Entering Condenser

Water Temperature Entering Ice Machine

Published 24 hour ice production

Calculated (actual) ice production

NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is

within 10% of charted capacity.

Installation and Water System

All installation and water related problems must be corrected before proceeding with table.

Ice Formation Pattern

Top or 1 Side_________

Bottom or 1 Side_________

Ice formation is

extremely thin on outlet

of evaporator

-or-

No ice formation on one

side or Top or Bottom of

evaporator

Ice formation is

extremely thin on outlet

of one side or Top or

Bottom of evaporator

-or-

No ice formation on

entire evaporator

Ice formation normal

-or-

Ice formation is

extremely thin at inlet

of one side or Top or

Bottom of evaporator

-or-

No ice formation on

entire evaporator

Ice formation normal

-or-

No ice formation on

entire evaporator

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Discharge Line Temperature

Record freeze cycle discharge line

temperature at the end of the

freeze cycle.

T2 _________°F (°C)

Reference “Discharge Line

Temperature Analysis” on page

123

Discharge line temp.

150°F (65°C)

or higher at the end of

the freeze cycle

Discharge line temp.

150°F (65°C)

or higher at the end of

the freeze cycle

Discharge line temp.

less than

150°F (65°C) at the end

of the freeze cycle

Discharge line temp.

150°F (65°C) or higher

at the end of the freeze

cycle

Wait 5 minutes into the freeze

cycle.

Compare temperatures of

compressor discharge line and

harvest valve inlet.

Reference “Harvest Valve

Analysis” on page 121

The harvest valve inlet

is Hot

-and-

approaches the

temperature of a Hot

compressor discharge

line.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Hot.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Cool

enough to hold hand on.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Hot.

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Freeze Cycle

Discharge Pressure

________ _______ ______

1 minute Middle End

into cycle

If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem

checklist to eliminate problems and/or components not listed on this table before proceeding.

Freeze Cycle

Suction Pressure

________ _______ ______

1 minute Middle End

into cycle

If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist

page 117 to eliminate problems and/or components not listed on this table before proceeding.

Suction pressure is

High

Suction pressure is

Low or Normal

Suction pressure is

High

Suction pressure is

High

Wait 5 minutes into the freeze

cycle.

Compare temperatures of

compressor discharge line and

both harvest valve inlets.

The harvest valve inlet

is Hot

-and-

approaches the

temperature of a Hot

compressor discharge

line.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Hot.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Cool

enough to hold hand on.

The harvest valve inlet

is Cool enough to hold

hand on

-and-

the compressor

discharge line is Hot.

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Discharge Line Temperature

Record freeze cycle discharge line

temperature at the end of the

freeze cycle

_________°F (°C)

Discharge line temp.

150°F (65°C)

or higher at the end of

the freeze cycle

Discharge line temp.

150°F (65°C)

or higher at the end of

the freeze cycle

Discharge line temp.

less than

150°F (65°C) at the end

of the freeze cycle

Discharge line temp.

150°F (65°C) or higher

at the end of the freeze

cycle

Final Analysis

Enter total number of boxes

checked in each column

Harvest Valve

Leaking

Low On Charge

-or-

TXV Starving

TXV Flooding Compressor

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106 Part Number: 000015430 Rev 04 4/22

Ice Production Check

The amount of ice a machine produces directly relates

to the operating water and air temperatures. This means

a condensing unit with a 70°F (21°C) outdoor ambient

temperature and 50°F (10°C) water produces more ice

than the same model condensing unit with a 90°F (32°C)

outdoor ambient temperature and 70°F (21°C) water.

1. Determine the ice machine operating conditions:

Air temp entering condenser:____°

Water temp entering sump trough:____°

2. Refer to the appropriate 24-Hour Ice Production Chart

(starting on page 201). Use the operating conditions

determined in step 1 to find published 24-Hour Ice

Production:_____

• Times are in minutes.

Example: 1 min. 15 sec. converts to 1.25 min.

(15 seconds ÷ 60 seconds = .25 minutes)

• Weights are in pounds.

Example: 2 lb. 6 oz. converts to 2.375 lb.

(6 oz. ÷ 16 oz. = .375 lb.)

3. Perform an ice production check using the formula

below.

1. +=

Freeze

Time

Harvest Time Total Cycle

Time

2. 1440 ÷ =

Minutes in

24 Hrs.

Total Cycle

Time

Cycles per Day

3. x=

Weight

of One

Harvest

Cycles per

Day

Actual 24-Hour

Production

Weighing the ice is the only 100% accurate check.

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Part Number: 000015430 Rev 04 4/22 107

However, if the ice pattern is normal and the 1/8"

thickness is maintained, the ice slab weights listed with the

24-Hour Ice Production Charts may be used.

4. Compare the results of step 3 with step 2. Ice

production checks that are within 10% of the

chart are considered normal. If they match closely,

determine if:

• Another ice machine is required.

• More storage capacity is required.

• Relocating the existing equipment to lower the

load conditions is required.

Contact the local Manitowoc Distributor for information on

available options and accessories.

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108 Part Number: 000015430 Rev 04 4/22

Installation/Visual Inspection Checklist

Inadequate Clearances

• Check all clearances on sides, back and top. Reference

“Clearance Requirements” on page 26

Ice machine is not level

• Level the ice machine

Condenser is dirty

• Clean the condenser

Water filtration is plugged (if used)

• Install a new water filter

Water drains are not run separately and/or are not

vented

• Run and vent drains according to the Installation

Manual

• Floor drain must have an air gap

• Install condensation drain in the ice machine base

Line set is improperly installed

• Reinstall according to the Installation Manual

Reference “Location of Ice Machine” on page 25

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Part Number: 000015430 Rev 04 4/22 109

Water System Checklist

A water-related problem often causes the same symptoms

as a refrigeration system component malfunction.

Water system problems must be identified and eliminated

prior to replacing refrigeration components.

Water area (evaporator) is dirty

• Clean as needed

Water inlet pressure not between 20 and 80 psig

(1-5 Bar, 138-552 kPa)

• Install water regulator or increase water pressure

Incoming water temperature is not between 35°F (2°C)

and 90°F (32°C)

• If too hot, check the hot water line check valves in

other store equipment

Water filtration is plugged (if used)

• Install a new water filter

Water dump valve leaking during the Freeze cycle

• Clean/replace dump valve as needed

Vent tube is not installed on water outlet drain

• See Installation Instructions

Hoses, fittings, etc., are leaking water

• Repair/replace as needed

Water fill valve is stuck open or closed

• Clean/replace as needed

Water is leaking out of the sump trough area

• Stop the water loss

Uneven water flow across the evaporator

• Clean the ice machine

Plastic extrusions and gaskets are not secured to the

evaporator

• Remount/replace as needed

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110 Part Number: 000015430 Rev 04 4/22

Ice Formation Pattern

Evaporator ice formation pattern analysis is helpful in ice

machine diagnostics.

Analyzing the ice formation pattern alone cannot diagnose

an ice machine malfunction. However, when this analysis

is used along with Manitowoc’s Freeze Cycle Refrigeration

System Operational Analysis Tables, it can help diagnose an

ice machine malfunction.

Any number of problems can cause improper ice

formation.

Important

Keep the water curtain/ice dampers in place while

checking the ice formation pattern to ensure no water

is lost.

1. Normal Ice Formation

Ice forms across the entire evaporator surface.

At the beginning of the Freeze cycle, it may appear that

more ice is forming on the inlet of the evaporator than on

the outlet. At the end of the Freeze cycle, ice formation

at the outlet will be close to, or just a bit thinner than,

ice formation at the inlet. The dimples in the cubes at the

outlet of the evaporator may be more pronounced than

those on the inlet. This is normal.

It is normal for ice thickness to vary up to 1/16" across the

surface of the evaporator. The ice bridge thickness at the

ice thickness control probe should be at least 1/8".

The ice thickness probe must be set to maintain the

ice bridge thickness at approximately 1/8" If ice forms

uniformly across the evaporator surface, but does not

reach 1/8" in the proper amount of time, this is still

considered a normal ice fill pattern.

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Part Number: 000015430 Rev 04 4/22 111

2. Extremely Thin at Evaporator Outlet

There is no ice, or a considerable lack of ice formation, at

the outlet of the evaporator.

Examples: No ice at all on the outlet half of the evaporator,

but ice forms on the inlet half of the evaporator. Or, the ice

at the outlet of the evaporator reaches 1/8" to initiate a

harvest, but the inlet of the evaporator already has 1/2" to

1" of ice formation.

3. Extremely Thin at Evaporator Inlet

There is no ice, or a considerable lack of ice formation

at the inlet of the evaporator. Examples: The ice at the

outlet of the evaporator reaches 1/8" to initiate a harvest,

but there is no ice formation at all on the inlet of the

evaporator.

4. No Ice Formation

The ice machine operates for an extended period, but

there is no ice formation at all on the evaporator.

Evaporator Tubing Routing

Routing of the tubing on the back of the evaporator

determines the ice fill pattern failure mode.

One Evaporator, One TXV models

The evaporator outlet tubing does not exit directly at the

top of the evaporator, but exits several inches below the

top of the evaporator. Extremely Thin at the Evaporator

Outlet will first be visible several inches below the top of

the evaporator. Extremely Thin at Evaporator Inlet will first

be visible at the bottom of the evaporator.

Outlet

Inlet

Thin at Inlet

Thin at Outlet

ICE

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112 Part Number: 000015430 Rev 04 4/22

One Evaporator, Two TXV 30" Models

Tubing routing for one evaporator with two TXV’s is

different. The evaporator has two inlets and outlets. Fill

pattern varies depending on which circuit is affected,

Extremely Thin at the Evaporator Outlet will first be visible

either 1/4 or 3/4 of the way down the evaporator.

Extremely Thin at the Evaporator Inlet will show at

the bottom of the evaporator or 1/2 of the way down

depending on the circuit affected.

Thin at Outlet

Thin at Inlet

ICE

Outlet

Inlet

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Part Number: 000015430 Rev 04 4/22 113

One Evaporator, Two TXV 48" Models

Tubing routing for one evaporator with two TXV’s is

different. The evaporator has two inlets and outlets. Fill

pattern varies depending on which circuit is affected.

Extremely Thin at the Evaporator Outlet will first be visible

1/3 of the way down the evaporator. Only one side of the

evaporator may be affected depending on failure. A TXV

failure will usually show on only one side, while low on

refrigerant can affect one or both sides depending on the

amount of refrigerant loss and ambient temperature.

Extremely Thin at the Evaporator Inlet will show at the

bottom of the evaporator. Depending on the failure either

the entire bottom of the evaporator or one side of the

bottom of the evaporator may be affected.

Thin at Inlet

Thin at Outlet

ICE

Outlet

Inlet

Outlet

Inlet

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Analyzing Discharge Pressure in the Freeze Cycle

1. Determine the ice machine operating conditions:

Air temp. entering condenser ______ °

Water temp. entering sump trough ______ °

2. Refer to Operating Pressure table (starting on page

201) for ice machine being checked.

3. Use the operating conditions determined in step

1 to find the published normal discharge pressures:

Freeze Cycle ______

Harvest Cycle ______

4. Perform an actual discharge pressure check.

Freeze Cycle

psig (kPa)

1 Minute into the

Freeze Cycle __________

Middle of Freeze Cycle __________

End of Freeze Cycle __________

5. Compare the actual discharge pressure (step 3) with

the published discharge pressure (step 2).

The discharge pressure is normal when the actual

pressure falls within the published pressure range

for the ice machine’s operating conditions. It is

normal for the discharge pressure to be higher at the

beginning of the Freeze cycle (when load is greatest),

then drop throughout the Freeze cycle.

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Part Number: 000015430 Rev 04 4/22 115

Freeze Cycle Discharge Pressure High Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Air Condenser

• Dirty condenser filter

• Dirty condenser fins

• High inlet air temperature

• Condenser discharge air recirculation

• Defective fan cycling control

• Defective fan motor

• Defective head pressure control valve (Remote)

Water Condenser

• Low water pressure (20 psig [138 kPa] min.)

• High inlet water temperature (90°F/32°C max.)

• Dirty condenser

• Dirty/Defective water regulating valve

• Water regulating valve out of adjustment

Other

• Overcharged

• Non-condensible (air) in system

• Wrong type of refrigerant

• Non-Manitowoc components in system

• High side refrigerant lines/component restricted

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116 Part Number: 000015430 Rev 04 4/22

Freeze Cycle Discharge Pressure Low Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Air Cooled Condensers

• Defective head pressure control valve, won’t bypass

refer to “Head Pressure Control Valve” on page 172

• Defective fan cycle control, stuck closed

refer to “Fan Cycle Control” on page 165

Water Cooled Condensers

• Water Regulating Valve out of adjustment

• Water Regulating Valve Defective

Other

• Undercharged

• Wrong type of refrigerant

• Non-Manitowoc components in system

• Liquid line/component restricted

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Part Number: 000015430 Rev 04 4/22 117

Analyzing Suction Pressure

The suction pressure gradually drops throughout the

freeze cycle. The actual suction pressure (and drop rate)

changes as the air and water temperature entering the

ice machine changes. These variables also determine the

freeze cycle times.

To analyze and identify the proper suction pressure drop

throughout the freeze cycle, compare the published

suction pressure to the published freeze cycle time.

NOTE: Analyze discharge pressure before analyzing suction

pressure. High or low discharge pressure may be causing

high or low suction pressure.

1. Determine the ice machine operating conditions:

Air temp. entering condenser ______ °

Water temp. entering sump trough ______ °

2. Refer to Operating Pressure table (starting on page

201 for ice machine being checked:

3. Use the operating conditions determined in step

1 to find the published normal discharge pressures.

Freeze Cycle ______

Harvest Cycle ______

4. Perform an actual suction pressure check.

Freeze Cycle

psig (kPa)

1 Minute into the

Freeze Cycle __________

Middle of Freeze Cycle __________

End of Freeze Cycle __________

5. Compare the actual suction pressure (step 3) with the

published suction pressure (step 2).

NOTE: The suction pressure is normal when the actual

pressure falls within the published pressure range for

the ice machine’s operating conditions. It is normal for

the suction pressure to be higher at the beginning of the

Freeze cycle (when load is greatest), then drop throughout

the Freeze cycle.

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Suction Pressure High Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Discharge Pressure

• Discharge pressure is too high and is affecting suction

pressure – refer to “Freeze Cycle Discharge Pressure

High Checklist” on page 115

Improper Refrigerant Charge

• Overcharged (also see “Freeze Cycle Discharge

Pressure High Checklist” on page 115)

• Wrong type of refrigerant

• Non condensible in system

Components

• Harvest valve leaking

• Harvest pressure solenoid valve leaking

• TXV flooding

• Defective compressor

Other

• Non-Manitowoc components in system

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Suction Pressure Low Checklist

Improper Installation

• Refer to “Installation/Visual Inspection Checklist” on

page 108

Discharge Pressure

• Discharge pressure is too low and is affecting low

side – refer to “Freeze Cycle Discharge Pressure Low

Checklist” on page 116

Improper Refrigerant Charge

• Undercharged

• Wrong type of refrigerant

Other

• Non-Manitowoc components in system

• Improper water supply over evaporator – refer to

“Water System Checklist” on page 109

• Restricted/plugged liquid line drier

• Restricted/plugged tubing in suction side or liquid line

of refrigeration system

• TXV starving

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120 Part Number: 000015430 Rev 04 4/22

Comparing Evaporator Inlet and Outlet Temperatures -

Self-contained & Remote Condenser Single Expansion

Valve Machines

The temperatures of the suction lines entering and leaving

the evaporator alone cannot diagnose an ice machine.

However, comparing these temperatures during the

freeze cycle, along with using Manitowoc’s Freeze Cycle

Refrigeration System Operational Analysis Table, can help

diagnose an ice machine malfunction.

The actual temperatures entering and leaving the

evaporator vary by model, and change throughout the

freeze cycle. This makes documenting the “normal”

inlet and outlet temperature readings difficult. The key

to the diagnosis lies in the difference between the two

temperatures five minutes into the freeze cycle. These

temperatures should be within 7° of each other.

Use this procedure to document freeze cycle inlet and

outlet temperatures.

1. Navigate to Service/Diagnostics/Temperature Sensors.

2. Wait 5 minutes into the freeze cycle.

3. Record the evaporator inlet (T3) and outlet (T4)

temperatures at 5 minutes into the freeze cycle.

Determine the difference.

4. Record the information on the table.

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Harvest Valve Analysis

Symptoms of a harvest valve remaining partially open

during the freeze cycle can be similar to symptoms of

either an expansion valve or compressor problem. The best

way to diagnose a harvest valve is by using Manitowoc’s

Ice Machine Freeze Cycle Refrigeration System Operational

Analysis Table.

Use the following procedures to determine if a harvest

valve is remaining partially open during the freeze cycle.

SELFCONTAINED OR REMOTE CONDENSER MODELS

HARVEST VALVE ANALYSIS

1. Wait five minutes into the freeze cycle.

2. Feel the inlet of the harvest valve(s).

Important

Feeling the harvest valve outlet or across the harvest

valve itself will not work for this comparison.

The harvest valve outlet is on the suction side (cool

refrigerant). It may be cool enough to touch even if the

valve is leaking.

3. Feel the compressor discharge line.

4. Compare the temperature of the inlet of the harvest

valves to the temperature of the compressor

discharge line.

Caution

The inlet of the harvest valve and the compressor

discharge line could be hot enough to burn your hand.

Just touch them momentarily.

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Findings Comments

The inlet of the harvest valve

is cool enough to touch and

the compressor discharge line

is hot.

Cool & Hot

Normal Operation

This is normal as the discharge

line should always be too hot

to touch and the harvest valve

inlet, although too hot to touch

during harvest, should be

cool enough to touch after 5

minutes into the freeze cycle.

The inlet of the harvest

valve is hot and approaches

the temperature of a hot

compressor discharge line.

Hot & Hot

Leaking Harvest Valve

The harvest valve inlet did not

cool down during the freeze

cycle due to continual leakage

of compressor discharge gas

through the valve.

Both the inlet of the harvest

valve and the compressor

discharge line are cool enough

to touch.

Cool & Cool

Harvest Valve Not Leaking

The compressor discharge

line should not be cool to the

touch 5 minutes into the freeze

cycle. This symptom would not

be caused by a harvest valve

leaking.

5. Record your findings on the table.

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Discharge Line Temperature Analysis

GENERAL

Knowing if the discharge line temperature is increasing,

decreasing or remaining constant can be an important

diagnostic tool. Compressor discharge line temperature

on a normally operating ice machine steadily increases

throughout the freeze cycle.

Ambient air temperatures affect the discharge line

temperature.

Higher ambient air temperatures at the condenser and/

or higher inlet water temperature = higher discharge line

temperatures at the compressor.

Lower ambient air temperatures at the condenser and/

or lower supply water temperature = lower discharge line

temperatures at the compressor.

Regardless of ambient and water temperatures, the freeze

cycle discharge line temperature should be higher than

150°F (66°C) at the end of the freeze cycle.

PROCEDURE

1. Navigate to Service/Diagnostics/Temperature

Sensors/T2 Thermistor.

2. Observe the discharge line temperature (T2) for the

last three minutes of the freeze cycle and record on

the table.

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124 Part Number: 000015430 Rev 04 4/22

Water Regulating Valve

Problem (Freeze Cycle)

Valve not maintaining discharge pressure.

• Valve incorrectly set, dirty or defective. Adjust valve

to correct discharge pressure for your model (refer

to cycle times/24 hour productions charts), clean or

replace valve.

Discharge pressure extremely high; Liquid line entering

receiver feels hot

• Water regulating valve incorrectly set or not opening

• Insufficient water volume - undersized/kinked lines,

mineral or scale buildup in lines.

Discharge pressure low, Liquid line entering receiver feels

warm to hot

• Ice machine low on charge. Refer to “Total System

Refrigerant Charge” on page 199.

Water pressure forces water regulating valve open

• Reduce incoming water pressure or install high

pressure water regulating valve.

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Final Analysis - Self-contained Air, Water & Remote

Condenser Models

The column with the highest number of check marks

identifies the refrigeration problem.

COLUMN 1  HARVEST VALVE LEAKING

Replace the valve as required.

COLUMN 2  LOW CHARGE/TXV STARVING

Normally, a starving expansion valve only affects the freeze

cycle pressures, not the harvest cycle pressures. A low

refrigerant charge normally affects both pressures. Verify

the ice machine is not low on charge before replacing an

expansion valve.

1. Add refrigerant charge to verify a low charge (air and

water self-contained only). Do not add more than

30% of nameplate refrigerant charge. If the problem is

corrected, the ice machine is low on charge.

NOTE: Do not add charge to remote models. The

symptoms of a remote low on charge will result in a safety

long freeze in cool ambient temperatures. Check the liquid

line temperature at the ice machine. The liquid line will be

hot with a normal or below normal head pressure in freeze

when the ice machine is low on refrigerant.

2. Find the refrigerant leak. The ice machine must

operate with the nameplate charge. If the leak cannot

be found, proper refrigerant procedures must still be

followed. Change the liquid line drier. Then, evacuate

and weigh in the proper charge.

3. If the problem is not corrected by adding charge, the

expansion valve is faulty.

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COLUMN 3  TXV FLOODING OR REFRIGERANT

OVERCHARGE

A loose or improperly mounted expansion valve bulb

causes the expansion valve to flood. Check bulb mounting,

insulation, etc, before changing the valve. Verify refrigerant

amount is correct by weighing recovered refrigerant before

replacing a TXV.

COLUMN 4  COMPRESSOR

Replace the compressor. To receive warranty credit, the

compressor ports must be properly sealed by crimping and

soldering them closed.

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SYMPTOM #3 & #4  HARVEST PROBLEMS

SELFCONTAINED AIR, WATER & REMOTE CONDENSER

MODELS

Definition of a harvest problem; At the end of a 3.5

minute harvest cycle the slab of ice is still contacting the

evaporator. The slab of ice may or may not be removable

by hand.

Harvest problems can be split into two symptoms.

• Symptom 3 - Normal sheet of cubes at the end of

the harvest cycle. Ice is difficult to remove from the

evaporator by hand. Once removed the back of the

cubes are square and show no signs of melting. This

indicates a refrigeration problem. The source of the

problem could be in the freeze or harvest cycle. Use

the appropriate flow chart (in Troubleshooting) to

determine the cause of the problem.

• Symptom 4 - Melted sheet of cubes at the end of

the harvest cycle. Ice can be removed rather easily

by hand. The back of the cubes are misshapen and

melted. This indicates something is preventing the ice

slab from releasing. Follow the appropriate flow chart

(in Troubleshooting) to determine the cause of the

problem. A manual cleaning procedure must always be

performed when this problem is encountered.

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SYMPTOM #3  SELFCONTAINED AIR OR WATER

COOLED

YES

Ice Machine Will Not Harvest - Normal Ice Fill and Ice Cubes are Not Melted Aer Harvest

START

Low producon,

Normal ﬁll paern, long

harvest cycle, Possible SL #2,

Back of cubes are not melted

Discharge line temperature is greater than

150°F at the end of the freeze cycle?

Refer to

Symptom #2

Freeze Cycle

Operaonal

Analysis Table

Is harvest valve energized?

Refer to Sequence of

Operaon &

Wiring Diagrams

Is head pressure high &

sucon pressure low

in harvest?

(Refer to Pressure Charts)

Verify coil has power

and funcons,

replace harvest

valve if coil

is good

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YES

Self Contained

Air-cooled Condenser?

Fan cycling

control operates correctly

in freeze cycle?

Fan cycling

control opens below setpoint

in harvest cycle?

Replace Fan

Cycling Control

Are you sure Discharge line

temperature is normal?

Repeat this ﬂowchart

& verify all data

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130 Part Number: 000015430 Rev 04 4/22

SYMPTOM #3  REMOTE CONDENSER

Refer to Symptom

#2 - Freeze Cycle

Analysis Chart

Tradional Remote Ice Machine - Long Harvest/Low Producon/Intermient Service Fault E02

Fails at night or in low

ambient - Operates

normally above 70F/21C

YES

Liquid Line Temperature Cool

Liquid Line

Temperature Hot

Liquid Line

Temperature Warm

(body temperature)

Wet condenser

with water during

freeze cycle

Replace Headmaster

System low on refrigerant

Normal ice ﬁll, long harvest cycle,

possible E02, back of cubes are

not melted at the end of harvest cycle

Discharge line temperature

is normal at the end of the

freeze cycle?

All Remotes = >150F/66C

START

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Part Number: 000015430 Rev 04 4/22 131

Refer to Sequence of

Operaon &

Wiring Diagrams

YES

Is harvest valve energized?

Is head pressure high &

sucon pressure low

in harvest?

Verify coil has power and funcons,

Replace harvest valve if coil is good

Is head pressure low &

sucon pressure low

in harvest?

Is head pressure normal &

sucon pressure normal

in harvest?

Refer to Harvest Pressure

Regulang Valve

Diagnoscs

Repeat this ﬂowchart &

verify all data

Refer to Symptom #4 -

Will Not Harvest, Freeze

Cycle Normal & Ice Cubes are

Melted Flowchart

Single Evaporator Systems with Dual Harvest Valves: If one Harvest Vavle is open and the other is restricted / stuck closed you may have

normal harvest pressures. Look for ice not melng on one side of the evaporator.

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132 Part Number: 000015430 Rev 04 4/22

SYMPTOM #4  SELFCONTAINED AIR, WATERCOOLED OR REMOTE

Level Ice

Machine

Refer to

Dump Valve

Diagnoscs

Is water ﬂowing over the

evaporator in the ﬁrst 45 seconds

of harvest?

Is Ice

Machine level?

Are back of the cubes

melted at end of

harvest cycle?

Does ice remain frozen to

the evaporator at the end of

the harvest cycle?

YES

Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Melted Aer Harvest

Refer to

Symptom #3

Freeze Cycle

Operaonal

Analysis Table

START

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Part Number: 000015430 Rev 04 4/22 133

Refer to Symptom #2

Freeze Cycle Operaonal

Analysis Table

Refer to Preventave

Maintenance

Cleaning Procedure

Discharge line temperature is greater than

150

°F at the end of the freeze cycle?

Refer to

Ice Thickness Probe

Adjustment Procedure

Is the evaporator dirty?

(Dry evaporator ﬁrst then check)

YES

Are ice thickness, cycle mes

and slab weights correct?

Is the evaporator damaged?

Dents, loose parons or

plang issues?

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134 Part Number: 000015430 Rev 04 4/22

THIS PAGE INTENTIONALLY LEFT BLANK

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Part Number: 000015430 Rev 04 4/22 135

Electrical Components

CONTROL BOARD, DISPLAY AND TOUCHSCREEN

FUNCTION

The control board, display and touchscreen provide user

input and control the ice machine sequence of operation.

NOTE: Anytime power is supplied to wires #55 & #56 on

the control board, the “Display” and “Micro” lights will

flash on and off randomly. The two green lights are located

on the top corner of the control board.

Display Diagnostics

Symptom - Micro light flashes and display light is off.

Reboot ice machine by disconnecting power for a

minimum of 15 seconds, reapplying power and checking

micro light for normal flashing.

Disconnect the display module communication cable from

the control board and inspect for damaged or corroded

pins. Reconnect after inspection.

Press the Power button on the display and watch the green

Display light on the control board.

Display light flashes - Test run ice machine.

Display light is off - Replace display/touchscreen assembly.

Component Check Procedures

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136 Part Number: 000015430 Rev 04 4/22

Control Board Diagnostics

1. Micro light is not flashing.

2. Disconnect line voltage power supply to the ice

machine and wait a minimum of 15 seconds, then

reapply power.

A. Micro light flashes - continue with step 3.

B. Micro light is off - Test fuse for continuity. If fuse

tests good replace control board.

3. Perform a control board self-test.

• Menu/Service/Diagnostics/Control Board/Self Check.

The control board performs a self test. As the test

progresses the display will show pass or fail as the tests are

completed.

• Status passed -The control board is functioning

normally, continue with touchscreen diagnostics on

next page.

• Status failed - Replace control board.

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Part Number: 000015430 Rev 04 4/22 137

Touchscreen Diagnostics

Verify touchscreen is unlocked prior to performing

diagnostics.

1. Navigate to User Interface on the display and perform

the on-screen instructions.

• Menu/Service/Diagnostics/User Interface.

NOTE: During screen calibration it is important to touch

and hold down the cross hairs for three seconds at a time.

2. The calibration will either pass or fail. If the

touchscreen fails calibration and will not function

correctly in other menu functions replace the

touchscreen module.

NOTE: Verify you have followed all of the instructions for

screen calibration. Skipping steps will result in a failed

calibration message.

Bypassing the Touchscreen

The ice machine can be run without a touchscreen by

pressing the Display Bypass button on the control board.

This will allow time to order and replace the defective

touchscreen.

1. Verify touchscreen is not locked.

2. Disconnect the touchscreen from the control board.

3. Wait a minimum of 30 seconds for the display bypass

button on the control board to become active.

4. Press the display bypass button and the “Display

Bypass Active” LED will energize and the ice machine

will start ice making.

NOTE: Pressing the display bypass button again will stop

ice making. Pressing again to restart ice making.

5. The ice machine will run for 500 ice making cycles and

then stop (approximately 7 days of run time).

After the 500 cycles have completed, pressing the test

button again will start another 7 days of ice making.

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138 Part Number: 000015430 Rev 04 4/22

CONTROL BOARD RELAY TEST

The control board can be set to energize all relays for 3.5

minutes. This allows testing to verify control board relays

are closed and line voltage is available for ice machine

components - Water pump, dump valve, water inlet valve,

harvest valve(s), air compressor(s), contactor/compressor/

fan motor - The fan cycle control must close to energize

the fan motor.

1. Press Power button to turn off ice machine and

navigate in menu to enable all relays.

• Menu/Service/Diagnostics/Control Board/Enable All

Relays.

2. The control board will energize all relays and the red

light next to the relay. The red light indicates the relay

coil is energized.

3. Test for line voltage at the individual components.

A. Line voltage is present and the component is non

functional - Replace component

B. Voltage is not present at the component -

Proceed to step 5

4. Refer to wiring diagram and determine wire location

on the 9 pin molex connector for the component you

are testing.

5. Check for line voltage at the control board 9 pin molex

connector.

A. Line voltage at 9 pin connector - Repair wiring to

component

B. No power at 9 pin connector - Replace control

board

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Part Number: 000015430 Rev 04 4/22 139

PROGRAMMING A REPLACEMENT CONTROL BOARD

Indigo™ replacement control boards require the Model

number to be entered to activate the appropriate look up

tables for operation and diagnostic. This can be done two

different ways, USB Setup or Manual Setup.

USB Setup - Applicable when the control board is

operational and has a mechanical issue such as a sticking

relay. The asset data is transferred to the replacement

control board from the faulty control board. Refer to

page 141 “Exporting Data To A Flash Drive” before

installing the replacement board.

Manual Setup - Applicable when the control board is non-

operational or data from the faulty board is suspect.

1. Install replacement control board and reapply power.

2. Navigate to control board replacement and follow the

on screen prompts:

Menu/Service/Control Board Replacement.

NOTE: If a replacement control board is installed into

the ice machine without a display and model number.

The “Display Bypass Button” button can still activate the

ice making mode without the display. This will allow the

ice machine to temporary run until a new display can be

installed. Once a new display is installed the correct model

number will have to be entered into the ice machine.

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140 Part Number: 000015430 Rev 04 4/22

USB FLASH DRIVE SPECIFICATIONS AND FORMATTING

Updating firmware on Indigo™ model ice machines

requires a properly formatted 32 GB or smaller USB flash

drive. All USB flash drives must be formatted before use

to remove any software programs or files currently on the

flash drive.

USB Flash Drive Specifications:

• USB 2 Version

• 32 GB or less capacity

• Fat32 File System

USB Flash Drive Formatting:

Procedure to format a USB flash drive varies with operating

system software. Refer to operating system software

manufacturer’s website for formatting instructions.

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Part Number: 000015430 Rev 04 4/22 141

EXPORTING DATA TO A FLASH DRIVE

Data can be copied from the control board memory to

a flash drive and used to transfer setup and/or cycle

data to a replacement control board or to transfer setup

information to multiple ice machines. Data may also be

requested by service department personnel for analysis or

as an aid to troubleshooting. The data files are small and

can be attached to an email.

Important

The flash drive must be formatted before using. All files

and software on the flash drive are removed during the

formatting process.

1. Ensure that the ice machine’s power is on.

2. Press the Menu button.

3. Navigate to USB - Menu/Service/USB.

4. Insert the flash drive into the USB port on the ice

machine control board. Do not remove flash drive

until transfer is complete.

5. Select “Export Data” (do not remove flash drive until

update is complete) and remove USB drive when the

transfer is complete.

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142 Part Number: 000015430 Rev 04 4/22

UPGRADING FIRMWARE WITH A FLASH DRIVE

Important

The flash drive must be formatted before using. All files

and software on the flash drive are removed during the

formatting process.

1. Drag and drop the files from website or email onto a

flash drive, insuring they are not in a folder.

2. Ensure that the ice machine’s power is on.

3. Navigate to USB - Menu/Service/USB.

4. Insert the flash drive into the USB port on the ice

machine control board. (Do not remove flash drive

until update is complete.)

NOTE: See “Electronic Control Board” on page 252 for

USB location.

5. Select “Upgrade firmware” and remove USB drive

when the transfer is complete.

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Part Number: 000015430 Rev 04 4/22 143

MAIN FUSE

FUNCTION

The control board fuse stops ice machine operation if

electrical components fail, causing high amp draw.

SPECIFICATIONS

The main fuse is 250 Volt, 6.3 amp.

Warning

High (line) voltage is applied to the control board

(terminals #55 and #56) at all times. Removing the

control board fuse or pressing the Power button will not

remove the power supplied to the control board.

CHECK PROCEDURE

1. If the display is energized or the bin switch light is on

with the water curtain/ice dampers closed, the fuse

is good.

Warning

Disconnect electrical power to the entire ice machine

before proceeding.

2. Remove the fuse. Check for continuity across the fuse

with an ohmmeter.

Reading Result

Open (OL) Replace fuse

Closed (O) Fuse is good

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144 Part Number: 000015430 Rev 04 4/22

BIN SWITCH

FUNCTION

Movement of the water curtain/ice dampers control bin

switch operation. The bin switch has two main functions:

1. Terminating the Harvest cycle and returning the ice

machine to the Freeze cycle. This occurs when the bin

switch is opened and closed again within 30 seconds

during the Harvest cycle.

2. Automatic ice machine shut-off.

If the storage bin is full at the end of a Harvest cycle,

the sheet of cubes fails to clear the water curtain/ice

dampers and holds it open. After the water curtain/

ice dampers are held open for 30 seconds, the ice

machine shuts off. The ice machine remains off until

enough ice is removed from the storage bin to allow

the sheet of cubes to drop clear of the water curtain/

ice dampers. As the water curtain/ice dampers swing

back to the operating position, the bin switch closes

and the ice machine restarts, provide the 3-minute

delay has expired.

Important

The water curtain/ice dampers must be ON (bin switch

closed) to start ice making.

SPECIFICATIONS

The bin switch is a magnetically operated reed switch. The

magnet is attached to the lower right corner of the water

curtain and both ends of ice dampers.

The bin switch is connected to a varying D.C. voltage

circuit. (Voltage does not remain constant.)

NOTE: Because of a wide variation in D.C. voltage, it is

not recommended that a voltmeter be used to check bin

switch operation.

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Part Number: 000015430 Rev 04 4/22 145

Diagnostics

SYMPTOMS

Bin Switch Fails Open

• The ice machine will not start an ice making cycle and

the display indicates “Full Bin”.

• The ice machine displays “Full Bin Remove Ice” in the

clean cycle.

Bin Switch Fails Closed

• When running a “Long Harvest” alert is displayed.

• May be off on a E02 Long Harvest.

• The harvest cycle continues after ice opens and closes

the ice damper (harvest cycle is 7 minutes).

• A curtain fault is displayed in the alert log.

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146 Part Number: 000015430 Rev 04 4/22

DIAGNOSTICS

1. Verify bin switch, curtain/damper and curtain/damper

magnet are in place and navigate to Inputs.

• Menu/Service/Diagnostics/Inputs

2. Open and close the ice damper(s) repeatedly while

observing the display and control board lights.

A. Curtain switch cycles open/closed - The display

indicates open/closed and the control board light

energizes/de-energizes - Bin switch is operating

normally

B. Curtain switch remains closed, the display

indicates closed and control board light remains

on - Go to step 3

C. Curtain switch remains open, display indicates

open and control board light remains off - Go to

step 3

3. Disconnect bin switch wire from control board.

4. Jumper control board bin switch wire to ground, press

the Power button and observe the display and control

board lights.

A. Curtain switch closes, display indicates closed,

control board light energizes and the ice machine

starts - Replace bin switch

B. Curtain switch remains open, display indicates

open and the control board light is off - Verify

procedure was correctly followed - Replace

control board

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Part Number: 000015430 Rev 04 4/22 147

WATER LEVEL CONTROL CIRCUITRY

FUNCTION

The water level probe controls the water level by sensing

whether water is or is not contacting the water level

probe. The water level probe has three sensing probes.

Two probes are equal in length and are used to measures

conductivity for diagnostics, ice clarity and water miser

options. Factory default settings measure resistance from

both long probes to the short probe.

SPECIFICATIONS

Freeze Cycle Water Level Setting

The water level is not adjustable. If the water level is

incorrect, check the water level probe position. Reposition

or clean the probe as necessary.

Water Inlet Valve Safety Shut-Off

In the event of a water level probe failure, this feature

limits the maximum amount of time the water inlet valve

can remain.

SINGLE EVAPORATOR MODELS

Regardless of the water level probe input, the control

board automatically shuts off the water inlet valve if it

remains on for 12.5 continuous minutes (30 seconds in

prechill and two 6 minute periods in the freeze cycle).

Initial cycle is 14 minutes and 12.5 minutes thereafter.

DUAL EVAPORATOR MODELS

Regardless of the water level probe input, the control

board automatically shuts off the water inlet valve if it

remains on for 16.5 continuous minutes (30 seconds in

prechill and two 8 minute periods in the freeze cycle).

Initial cycle is 18 minutes and 16.5 minutes thereafter.

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148 Part Number: 000015430 Rev 04 4/22

Prechill & Freeze Cycle Operation

The water inlet valve energizes and de-energizes in

conjunction with the water level probe located in the

water trough.

• The water inlet valve is ON when there is no water in

contact with the water level probes.

• The water inlet valve turns OFF after water contacts

the water level probes for 6 continuous seconds.

• The water inlet valve can cycle ON and OFF once in the

prechill and up to two times in the freeze cycle.

• Maximum fill time is:

• Single evaporator 12 minutes.

• Dual evaporator 16 minutes.

The water inlet valve energizes in the Prechill cycle and will

de-energize if water touches the high level probe (in most

instances the water trough can’t fill in the prechill cycle

and the water inlet valve will remain energized into the

freeze cycle). The water inlet valve will remain energized

until water contacts the high water probe. The water inlet

valve will cycle ON, and then OFF one more time to refill

the water trough. The water inlet valve is now OFF for the

duration of the freeze cycle.

REVERSE OSMOSIS OR DEIONIZED WATER USAGE

When using water with low total dissolved solid content

(low TDS) the water level probe sensitivity can be

increased by moving the jumper over one pin (refer to

“Electronic Control Board” on page 252 for location).

The Electronic Control Board diagrams shows the default

position of the jumper covering the left and center pins.

Moving the jumper to the center and right pins and

enabling R.O. menu “Use less water with reverse osmosis”

will increase the sensitivity of the water level probe.

See “Water Usage” on page 58 for menu item location.

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Part Number: 000015430 Rev 04 4/22 149

Diagnostics

Important

The following occurs when the reverse osmosis (R.O.)

option has been enabled and then disabled (i.e. placed

back into factory default) and the jumper has not been

reset to the 45 second factory default position.

A. The higher water level probe sensitivity

will remain active see “Reverse Osmosis or

Deionized Water Usage” on page 148.

B. The control board will generate Water-Level

probe faults on every cycle.

C. The control board initiates a “Safe-Mode”

every other cycle.

Check real time data

1. Navigate to Menu/Service/Diagnostics/Inputs

2. Focus on Water LVL Low and Water LVL High display

• Not sensing displayed: indicates not touching

water.

• Sensing displayed: Indicates touching water.

NOTE: If using reverse osmosis or deionized water, increase

sensitivity by moving the jumper over one pin (refer to

“Electronic Control Board” on page 252) and enabling

R.O. menu “Use less water with reverse osmosis”.

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150 Part Number: 000015430 Rev 04 4/22

3. Disconnect the water level probe wiring harness from

the control board and ohm harness and water level

probe. Normal readings will show no resistance

Black

Short Probe

Red

Twisted

Wire

Ohm Water Level Probe and Wiring Harness

WATER LEVEL PROBE CIRCUIT CHECK AT CONTROL

BOARD

Wait until prechill cycle starts, then jumper water level

probe connections (Red/Black) on the control board.

A. Sensing displays and the water stops. Repair wire

or replace water level probe.

B. Not Sensing displays and the water continues to

flow. Replace control board.

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Part Number: 000015430 Rev 04 4/22 151

ICE THICKNESS PROBE INITIATES HARVEST

FUNCTION

The ice thickness probe senses ice on the evaporator and

signals the control board to start a harvest cycle.

SPECIFICATIONS

Freeze Time Lock-In Feature

The ice machine control system incorporates a 6 minute

freeze time lock-in feature.

Maximum Freeze Time

The maximum freeze time is 35 minutes at which time

the control board automatically initiates a harvest

sequence.

Maximum Temperature

Maximum temperature for the ice thickness probe is 120°F

(49°C). Do not clean probe in a dishwasher or expose to

temperatures above the maximum.

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152 Part Number: 000015430 Rev 04 4/22

Ice Thickness Check

The ice thickness probe is factory-set to maintain the ice

bridge thickness at 1/8" (3 mm).

NOTE: Initial gap should be set with the ice machine off.

Verify the water curtain/splash shields are in place when

performing this check. It prevents water from splashing

out of the water trough. Remove the curtain to make

an adjustment, then replace immediately after the

adjustment is made.

1. Inspect the bridge connecting the cubes. It should be

about 1/8" (3 mm) thick.

2. If adjustment is necessary, turn the ice thickness

probe adjustment screw clockwise to increase bridge

thickness or counterclockwise to decrease bridge

thickness. Set a 9/32" gap between the ice thickness

probe and evaporator as a starting point. Then adjust

to achieve 1/8" ice thickness.

3. Make sure the ice thickness probe wire and the

bracket do not restrict movement of the probe.

Place 9/32" (7 mm) Drill Bit

Here To Set Initial Gap

1/8" (3 mm)

Ice Bridge Thickness

Adjusting

Screw

ICE THICKNESS ADJUSTMENT

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Part Number: 000015430 Rev 04 4/22 153

Ice Thickness Probe Diagnostics

1. Perform Control Board Self Check and insure the

internal ITP circuit passes before proceeding.

(Menu/Service/Diagnostics/Control Board/Self Check)

• Ice Thickness Circuit: Pass = Continue with step #2.

• Ice Thickness Circuit: Fail = Change control board.

2. Remove all ice from the evaporator when present.

3. Press the Power button and turn off the ice machine.

4. Disconnect power to the ice machine at the main

disconnect.

5. Inspect the ice thickness probe for physical damage.

On the face of the probe look for bulging, cracks

around the nipple and deformed pivot pins or pivot

pin arms.

6. Verify the ice thickness probe gap is approximately

9/32 in. (7 mm) and the ice thickness probe wire and

bracket do not restrict movement of the probe. See

“Ice Thickness Check” on page 152.

7. Reapply power to the ice machine at the main

disconnect and confirm the ice machine is off.

8. Navigate to Real Time data (Menu/Service/Data/

Real Time data/Inputs) and observe ITP FFT 100 Hz &

120 Hz.

9. Observe the initial number range and perform a tap

test.

• Remove the water curtain or splash shield if present.

• Lift the ice thickness probe and carefully tap the nipple

on the face of the probe for at least 10 seconds.

NOTE: When performing tap test:

• Pass = ITP is not the problem

• Fail = Check DC Voltage on the control board

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154 Part Number: 000015430 Rev 04 4/22

The initial numbers displayed are constantly changing

and are less than 3000.

When the initial reading is 300 or lower and the tap test

reading exceeds the initial reading by 3000 or more, the

ice thickness probe and control board are both operating

correctly.

The initial numbers displayed do not change or initial

numbers did not increase by 3000 during tap test.

• Verify the ice thickness probe connector is properly

plugged into the board and the ice thickness probe

wiring is correct. If the wiring is incorrect replace the

ice thickness probe.

Ice Probe Connector On Control Board

Pin 1 (+) Red

Pin 2 (-) Black

Pin 3 Twisted Wire

10. Unplug the ice thickness probe and set a VOM to DC

voltage scale - Measure voltage across Pin 1 (+) Red

Wire and Pin 2 (-) Black Wire. Refer to “Electronic

Control Board” on page 252.

A. Voltage measures 3.25 to 3.35 VDC = Replace ice

thickness probe.

B. Voltage does not measure 3.25 to 3.35 VDC =

Replace the control board.

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Part Number: 000015430 Rev 04 4/22 155

HARVEST TEST

1. Press the power button to start an ice making cycle.

Remove water curtain or splash guard when present.

2. Remove the ice thickness probe, rotate and remount

with the nipple facing away from the evaporator.

3. Press the Menu button, scroll down to “Service”,

press the right arrow, scroll down to “RealTimeData”,

press the right arrow, scroll down to “Inputs”, press

the right arrow and then scroll down to “Ice Sense”.

4. Wait until 6.5 minutes into the freeze cycle. Refer to

Sequence of Operation starting on for details.

5. Scratch the ice thickness probe nipple for

approximately 30 seconds.

HARVEST CYCLE STARTS AND “ICE SENSE” CHANGES FROM

NO TO YES

The ice thickness probe and control board are operating

normally.

• Initiate a manual harvest cycle to remove ice from the

evaporator.

• Press the power button and turn off the ice machine.

• Remove the ice thickness probe, rotate and remount

with the nipple facing the evaporator. Set the ice

thickness probe gap to 9/32” (7 mm). Confirm the

cable is not twisted or binding and the ice thickness

probe swings freely, then re-install the water curtain.

• Perform an “Ice Thickness Check” and test run the ice

machine two cycles.

HARVEST CYCLE DOES NOT START

• If the control board fails to initiate a harvest cycle

replace the control board and perform “Ice Thickness

Check”.

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156 Part Number: 000015430 Rev 04 4/22

BIN LEVEL PROBE

The bin level probe accessory will place the ice machine in

a full bin cycle when ice lowers the temperature to 36°F or

less. A lower ice level in dispensers will prevent overfilling

or dispense wheel or motor damage.

• The bin probe reads actual temperature and must be

connected to the T5 terminal on the control board.

• The control board recognizes the bin level probe

automatically when installed. If the bin level probe

has not been recognized by the control board, restore

factory defaults and run the startup wizard.

Normal Operation

The control board will initiate a full bin cycle and a 5

minute time delay when both of the following occur:

1. The control board receives a temperature input of

36°F or less from the bin probe (T5 thermistor) at the

end of the freeze cycle.

2. The temperature reading remains at or below 36°F

throughout the entire harvest cycle.

The ice machine will restart when the delay period ends

and the bin probe reads 37°F or higher. Ice making will

resume at the Initial Start-Up or Start-Up After Automatic

Shut-Off (See “Sequence of Operation” on page 66).

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Part Number: 000015430 Rev 04 4/22 157

Troubleshooting

Refer to normal operation before troubleshooting - The T5

thermistor reading must indicate 36°F or less in the freeze

cycle and throughout the harvest cycle to shutoff on full

bin at the end of the harvest cycle.

View the T5 thermistor temperature on the touch screen

(menu/service/diagnostics/temperatures).

PROBE SHORTED  TEMPERATURE DISPLAYED IS ABOVE

400°F:

A shorted bin level probe wire/thermistor will indicate a

temperature higher than 400°F. This issues will result in the

ice machine only stopping on full bin when the bin switch

(curtain) is open at the end of a harvest cycle. The ice

machine will restart when the curtain closes.

PROBE OPEN  TEMPERATURE DISPLAYED READS 22°F

A shorted bin level probe wire/thermistor will indicate a

temperature lower than -10°F. This issue will result in the

ice machine only stopping on full bin when the bin switch

(curtain) is open at the end of a harvest cycle. The ice

machine will restart when the curtain closes.

PROBE OUT OF RANGE  TEMPERATURE READS LOWER

OR HIGHER THAN THE ACTUAL TEMPERATURE AT THE

BIN LEVEL PROBE

An out of range thermistor can indicate a temperature

higher or lower than the actual temperature at the bin

level probe location.

1. Verify actual temperature at the bin level probe

location with a thermometer.

2. Refer to “Thermistor Test” on page 161.

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158 Part Number: 000015430 Rev 04 4/22

THERMISTORS

FUNCTION

Thermistor resistance values change with temperature.

The value supplied to the control board is used to identify

temperature at the thermistor location.

SPECIFICATIONS

Temperature of Thermistor Resistance

°C °F K Ohms (x 1000)

-30° – -20° -22° – -4° 820.85 – 466.35

-20° – -10° -4° – 14° 466.35 – 269.05

-10° – 0° 14° – 32° 269.05 – 160.70

0° – 10° 32° – 50° 160.70 – 98.930

10° – 20° 50° – 68° 98.930 – 62.015

20° – 30° 68° – 86° 62.015 – 39.695

30° – 40° 86° – 104° 39.695 – 25.070

40° – 50° 104° – 122° 25.070 – 17.481

50° – 60° 122° – 140° 17.481 – 11.860

60° – 70° 140° – 158° 11.860 – 8.1900

70° – 80° 158° – 176° 8.1900 – 5.7530

80° – 90° 176° – 194° 5.7530 – 4.1015

90° – 100° 194° – 212° 4.1015 – 2.9735

100° – 110° 212° –230° 2.9735 – 2.1885

110° – 120° 230° – 248° 2.1885 – 1.6290

120° – 130° 248° – 266° 1.6290 – 1.2245

130° – 140° 266° – 284° 1.2245 – 0.9319

140° – 150° 284° – 302° 0.9319 – 0.7183

150° – 160° 302° – 320° 0.7183 – 0.5624

160° – 170° 320° – 338° 0.5624 – 0.4448

170° – 180° 338° – 356° 0.4448 – 0.3530

180° – 190° 356° – 374° 0.3530 – 0.2831

190° – 200° 374° – 392° 0.2831 – 0.2273

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Part Number: 000015430 Rev 04 4/22 159

Thermistor Matrix

Four thermistors are standard on the ice machine. They

are labeled T1, T2, T3, T4.

TEMPERATURE SENSOR LOCATION SELF CONTAINED

AIR OR WATER COOLED MODELS

22" & 30" Models with 1 evaporator, 1 evaporator circuit

and an air or water cooled condenser

T1 - Condenser Liquid Line

T2 - Compressor Discharge

T3 - Evaporator Inlet

T4 - Evaporator Outlet

30" & 48" Models with 1 evaporator, 2 evaporator circuits

and an air or water cooled condenser

T1 - Condenser Liquid Line

T2 - Compressor Discharge

T3 - Evaporator Outlet for second evaporator circuit

T4 - Evaporator Outlet for first evaporator circuit

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160 Part Number: 000015430 Rev 04 4/22

TEMPERATURE SENSOR LOCATION REMOTE AIR

COOLED CONDENSER MODELS

30" Models with 1 evaporator, 1 evaporator circuit and a

remote air cooled condenser

T1 - Receiver Inlet

T2 - Compressor Discharge

T3 - Evaporator Inlet

T4 - Evaporator Outlet

30" & 48" Models with 1 evaporator, 2 evaporator circuits

and a remote air cooled condenser

T1 - Receiver Inlet

T2 - Compressor Discharge

T3 - Evaporator Outlet for second evaporator circuit

T4 - Evaporator Outlet for first evaporator circuit

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Part Number: 000015430 Rev 04 4/22 161

SYMPTOM

Alert icon on the display and the alert indicates a T1, T2,

T3, or T4 Fault.

CHECK PROCEDURE

Navigate to Menu/Service/Data/Real Time data/Time &

Temperature

NOTE: An open thermistor will display less than -10°F

(-23°C) and a shorted thermistor will display higher than

400°F (204°C).

Thermistor Test

1. Disconnect thermistor from control board and

measure resistance.

2. Measure temperature at the thermistor.

3. Compare measured resistance/temperature readings

to resistance/temperature relationship chart.

A. Within 10% of the published resistance value -

Thermistor is good.

B. Not within 10% of the published resistance

value - Thermistor is defective.

Control Board Test

1. Disconnect thermistor from control board - The

display temperature reading, dropping below -10°F

(-23°C) indicates the control board is good.

2. Short thermistor pins - The display temperature

reading, higher than 400°F (204°C) indicates the

control board is good.

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162 Part Number: 000015430 Rev 04 4/22

HIGH PRESSURE CUTOUT HPCO CONTROL

FUNCTION

Stops the ice machine if subjected to excessive high-side

pressure. The HPCO control is normally closed, and opens

on a rise in discharge pressure.

SPECIFICATIONS

Specifications

Refrigerant Cut-Out Cut-In

R410A

600 psig ±10

(4136 kPa ±69)

450 psig ±10

(3103 kPa ±69)

R404A

450 psig ±7

(3102 kPa ±48)

300 psig ±10

(2068 kPa ±69)

Automatic Reset

SYMPTOM

Opening the HPCO will cause the control board to initiate

a 10 minute delay after which the ice machine attempts a

restart. If the HPCO is closed the ice machine will continue

to run. If the HPCO remains open after the 10 minute delay

or reopens when the compressor starts, the ice machine

will start another 10 minute delay period.

1. Machine is off and the Alert Log indicates

E5 HPC Trip, the number of trips and the time and

date of the last trip.

2. Machine is running and the display has an alert

notification - Select the Alert Log to display the fault.

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Part Number: 000015430 Rev 04 4/22 163

CHECK PROCEDURE

Symptom #1 Machine is off and the display indicates an

E5 HPC Trip in the Alert Log.

1. Install a manifold gauge set.

2. Start a new freeze cycle by cycling the Power button.

3. Run the system to see if the control trips at the rated

pressure. If HPCO opens at a pressure significantly

lower or higher than the control setting replace the

HPCO.

4. If the control opens at the correct pressure find the

root cause - Fan motor, dirty condenser, refrigeration

system issue, etc. The ice machine will go to an initial

start sequence if the HPCO is closed. If the HPCO is

open, another 10 minute delay period starts. When

the compressor relay closes the control board checks

the HPCO.

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164 Part Number: 000015430 Rev 04 4/22

Symptom #2 Machine is running and the display has an

alert indication.

1. The display indicates an E5 HPC Trip in the Alert Log.

Open the alert and view when and how often HPCO

Fault has occurred.

2. If this is a one time event it may be intermittent and

caused by conditions around the unit changing. For

example: High ambient temperature, water turned off

to condenser (water cooled unit) etc.

3. Run the system to see if the control trips at the rated

pressure. If HPCO opens at a pressure significantly

lower than the control setting replace the HPCO.

4. If the control opens at the correct pressure find the

root cause - Fan motor, dirty condenser, refrigeration

system issue, etc.

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Part Number: 000015430 Rev 04 4/22 165

FAN CYCLE CONTROL

FUNCTION

Cycles the fan motor on and off to maintain proper

operating discharge pressure.

The fan cycle control closes on an increase, and opens on a

decrease in discharge pressure.

SPECIFICATIONS

Specifications

Model Cut-In (Close) Cut-Out (Open)

IT0300/IT0420/IT0500

IT0620/IT0750/IT0900

IT1200/IT1500/IT1900

335 psig ±5

(2310 kPa ±34)

275 psig ±5

(1896 kPa ±34)

IF0300/IF0600/IF0900

250 psig ±5

(1723 kPa ±34)

200 psig ±5

(1379 kPa ±34)

CHECK PROCEDURE

1. Verify fan motor windings are not open or grounded,

and fan spins freely.

2. Connect manifold gauge to ice machine.

3. Hook voltmeter in parallel across the fan cycle control,

leaving wires attached.

4. Refer to chart below.

FCC Set-point:

Reading

Should Be:

Fan

Should Be:

Above Cut-In 0 Volts Running

Below Cut-Out Line Voltage Off

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166 Part Number: 000015430 Rev 04 4/22

HARVEST ASSIST AIR PUMP

FUNCTION

The air pump helps break the vacuum between the sheet

of ice and the evaporator which results in shorter harvest

cycles.

SPECIFICATIONS

115 Volt or 230 Volt - matches the ice machine voltage.

CHECK PROCEDURE

1. The air pump is wired in parallel with the harvest

valve - Verify the ice machine is in the harvest cycle

and the harvest valve is energized.

2. If there is voltage at the air pump connector, use

a volt ohm meter to verify there is no continuity

through the motor windings then replace motor.

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Part Number: 000015430 Rev 04 4/22 167

COMPRESSOR ELECTRICAL DIAGNOSTICS

The compressor does not start or will trip repeatedly on

overload.

Check Resistance (Ohm) Values

NOTE: Compressor windings can have very low ohm

values. Use a properly calibrated meter.

Perform the resistance test after the compressor cools. The

compressor dome should be cool enough to touch (below

120°F/49°C) to assure that the overload is closed and the

resistance readings will be accurate.

SINGLE PHASE COMPRESSORS

1. Disconnect power then remove the wires from the

compressor terminals.

2. The resistance values between C and S and between

C and R, when added together, should equal the

resistance value between S and R.

3. If the overload is open, there will be a resistance

reading between S and R, and open readings between

C and S and between C and R. Allow the compressor

to cool, then check the readings again.

THREE PHASE COMPRESSORS

1. Disconnect power and remove the wires from the

compressor terminals.

2. The resistance values between L1 and L2, between L2

and L3, and between L3 and L1 should all be equal.

3. If the overload is open, there will be open readings

between L1 and L2, between L2 and L3, and between

L3 and L1. Allow the compressor to cool, then check

the readings again.

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168 Part Number: 000015430 Rev 04 4/22

CHECK MOTOR WINDINGS TO GROUND

Check continuity between all three terminals and the

compressor shell or copper refrigeration line. Scrape metal

surface to get good contact. If continuity is present, the

compressor windings are grounded and the compressor

should be replaced.

COMPRESSOR DRAWING LOCKED ROTOR

To determine if the compressor is seized, check the amp

draw while the compressor is trying to start.

The two likely causes of this are a defective starting

component or a mechanically seized compressor.

To determine which you have:

1. Install high and low side gauge.

2. Try to start the compressor.

3. Watch the pressures closely.

A. If the pressures do not move, the compressor is

seized. Replace the compressor.

B. If the pressures move, the compressor is turning

slowly and is not seized. Check the capacitors

and relay.

COMPRESSOR DRAWING HIGH AMPS

The continuous amperage draw on start-up should not be

near the maximum fuse size indicated on the serial tag.

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Part Number: 000015430 Rev 04 4/22 169

DIAGNOSING START COMPONENTS

If the compressor attempts to start, or hums and trips the

overload protector, check the start components before

replacing the compressor.

Capacitor

Visual evidence of capacitor failure can include a bulged

terminal end or a ruptured membrane. Do not assume a

capacitor is good if no visual evidence is present. A good

test is to install a known good substitute capacitor. Use

a capacitor tester when checking a suspect capacitor.

Clip the bleed resistor off the capacitor terminals before

testing.

Relay

The relay has a set of contacts that connect and disconnect

the start capacitor from the compressor start winding. The

contacts on the relay are normally closed (start capacitor in

series with the start winding). The relay senses the voltage

generated by the start winding and opens the contacts as

the compressor motor starts. The contacts remain open

until the compressor is de-energized.

RELAY OPERATION CHECK

1. Disconnect wires from relay terminals.

2. Verify the contacts are closed.

Measure the resistance between terminals 1 and 2.

No continuity indicates open contacts. Replace the

relay.

3. Check the relay coil.

Measure the resistance between terminals 2 and

5. No resistance indicates an open coil. Replace the

relay.

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170 Part Number: 000015430 Rev 04 4/22

PTCR

The PTCR allows current to flow through the start winding

at compressor startup. Current flow heats the ceramic

discs in the PTCR. The electrical resistance increases with

temperature and stops all except a trickle of current flow

through the start winding. The small flow of current keeps

the PTCR hot (260°F/127°C) and the start winding out of

the circuit.

The PTCR must be cooled before attempting to start the

compressor, otherwise the PTCR will heat up too quickly

and stop current flow through the start winding before the

compressor motor reaches full speed.

Warning

Disconnect electrical power to the entire ice machine at

the building electrical disconnect box before proceeding.

NOTE: If a PTCR is dropped internal damage can occur

to the ceramic PTCR discs. The ceramic disc can chip and

cause arcing which leads to PTCR failure. Since there is no

way to open the PTCR in order to determine if the ceramic

disc is chipped or not, it must be discarded when dropped.

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Part Number: 000015430 Rev 04 4/22 171

PTCR Operation Check

1. Visually inspect the PTCR. Check for signs of physical

damage.

NOTE: The PTCR case temperature may reach 210°F

(100°C) while the compressor is running. This is normal. Do

not change a PTCR just because it is hot.

2. Wait at least 10 minutes for the PTCR to cool to room

temperature.

3. Remove the PTCR from the ice machine.

4. Measure the resistance of the PTCR as shown. The

resistance reading must be between:

PTCR Ohm Value Amp Part Number

Two Terminal Black

Cera-Mite 305C2

60 to 110 12 000014323

Two Terminal

Black or Blue

Cera-Mite 305C20

24 to 46 10 8505003

Three Terminal

Blue or Tan

Cera-Mite 305C19

21 to 39 18 8504993

Three Terminal

Blue or Tan

Cera-Mite 305C09

10 to 20 36 8504913

Two Terminal PTCR

Three Terminal PTCR

Measure Resistance at Ends

Measure Resistance at Center and End

Leave Jumper Wire Attached

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172 Part Number: 000015430 Rev 04 4/22

Refrigeration Components

HEAD PRESSURE CONTROL VALVE

Manitowoc remote systems require head pressure control

valves with special settings. Replace defective head

pressure control valves only with “original” Manitowoc

replacement parts.

Refrigerant Charge Verification

The correct amount of refrigerant (name plate charge) is

required to operate correctly at all ambient conditions.

An ice machine with an overcharge or undercharge of

refrigerant may function properly at higher ambient

temperatures and fails at lower ambient temperatures.

Symptoms of incorrect refrigerant amount are:

• Works during the day and malfunctions at night, and/

or fails whenever the outdoor temperature drops.

• A Service Fault is stored in control board memory.

Refrigerant loss and ambient temperature are directly

related to each other. As the ambient temperature drops,

more refrigerant is stored in the condenser.

When the refrigerant charge and ambient temperature

create an undercharge of refrigerant in the freeze cycle,

the receiver dip tube will lose it’s liquid seal. Without liquid

refrigerant to the TXV, the ice machine fails to make a full

sheet of ice in 35 minutes and a Long Freeze results.

NOTE: When a head pressure control valve is being

replaced or refrigerant charge is suspected, verify the

refrigerant charge is correct by recovering the refrigerant,

weighing and comparing to the nameplate amount. Refer

to “Refrigerant Recovery/Evacuation” page 187 for

recovery procedures.

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Part Number: 000015430 Rev 04 4/22 173

Freeze Cycle Operation All Remote Condenser Models

The headmaster is non adjustable.

At ambient temperatures of approximately 70°F (21°C)

or above, refrigerant flows through the valve from the

condenser to the receiver inlet. At temperatures below

this (or at higher temperatures if it is raining), the head

pressure control dome’s nitrogen charge closes the

condenser port and opens the bypass port from the

compressor discharge line.

In this modulating mode, the valve maintains minimum

head pressure by building up liquid in the condenser and

bypassing discharge gas directly to the receiver.

Harvest Cycle Operation

Remote Condenser Models

Refrigerant flows from the compressor to the evaporator

through the harvest valve and the head pressure valve is

out of the circuit.

Diagnostics

FREEZE CYCLE  REMOTE CONDENSER

1. Determine if the coil is clean.

2. Determine the air temperature entering the

condenser.

3. Determine if the head pressure is high or low in

relationship to the outside temperature. (Refer to

the proper “Cycle Times/24-Hour Ice Production/

Refrigerant Pressure Charts” page 201).

4. Determine the temperature of the liquid line entering

the receiver by feeling it. This line is normally warm;

“body temperature.”

5. Using the information gathered, refer to the chart.

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174 Part Number: 000015430 Rev 04 4/22

NOTE: A head pressure control valve that will not bypass,

will function properly with condenser air temperatures

of approximately 70°F (21°C) or above. When the

temperature drops below 70°F (21°C), the head pressure

control valve fails to bypass and the ice machine

malfunctions. Lower ambient conditions can be simulated

by rinsing the condenser with cool water during the freeze

cycle.

Condition Probable Cause

Corrective

Measure

Discharge Pressure - High

Liquid Line Temperature

- Hot

Valve stuck in

bypass

Replace valve

Discharge Pressure - Low

Liquid Line Temperature

- Cold

Valve not

bypassing

Replace valve

Discharge Pressure - Low

Liquid Line Temperature

- Hot

Ice Machine Low

on Charge

Refrigerant

Charge

Verification

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Part Number: 000015430 Rev 04 4/22 175

Harvest Cycle

REMOTE CONDENSER

The head pressure control cycles into full bypass due to the

pressure drop when the harvest valve opens. Refrigerant

flows from the compressor to the evaporator through the

harvest valve and the head pressure valve is out of the

circuit.

Undercharge Symptoms

• Long Freeze or Long Harvest in control board memory

and an alert indicating Long Freeze or Long Harvest.

• Harvest cycle suction pressure is low.

• Harvest cycle discharge pressure is low.

• Liquid line entering receiver feels warm to hot in the

freeze cycle.

Overcharge Symptoms

• Long Harvest in control board memory and an alert

indicating Long Harvest is displayed.

• Harvest cycle discharge pressure is normal.

• Freeze cycle time, suction and discharge pressure are

normal and the ice machine will not harvest. The sheet

of ice cubes show little or no sign of melting when

removed from the evaporator after the harvest cycle

has been completed. (If the cubes are melted you have

a release problem, clean the ice machine.)

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176 Part Number: 000015430 Rev 04 4/22

HARVEST PRESSURE REGULATING HPR SYSTEM

REMOTE CONDENSER ONLY

GENERAL

The harvest pressure regulating (HPR) system includes:

• Harvest pressure regulating solenoid valve (HPR

solenoid). This is an electrically operated valve which

opens when energized, and closes when

de-energized. The HPR solenoid valve is wired in

parallel with the harvest valve.

• Harvest pressure regulating valve (HPR valve). This is a

pressure regulating valve which modulates open and

closed, based on the refrigerant pressure at the outlet

of the valve. The valve closes completely and stops

refrigerant flow when the pressure at the outlet rises

above the valve setting.

FREEZE CYCLE

The HPR system is not used during the freeze cycle.

The HPR solenoid is closed (de-energized), preventing

refrigerant flow into the HPR valve.

HARVEST CYCLE

During the harvest cycle, the check valve in the discharge

line prevents refrigerant in the remote condenser and

receiver from back feeding into the evaporator and

condensing to liquid.

The HPR solenoid is opened (energized) during the harvest

cycle, allowing refrigerant gas from the top of the receiver

to flow into the HPR valve. The HPR valve modulates open

and closed, raising the suction pressure high enough

to sustain heat for the harvest cycle, without allowing

refrigerant to condense to liquid in the evaporator.

In general, harvest cycle suction pressure rises, then

stabilizes. Exact pressures vary from model to model.

Refer to cycle time/24 hour ice production and operational

pressure charts.

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Part Number: 000015430 Rev 04 4/22 177

HPR DIAGNOSTICS

Steps 1 through 5 can be quickly verified without attaching

a manifold gauge set or thermometer.

All questions must have a yes answer to continue the

diagnostic procedure.

1. Liquid line warm?

(Body temperature is normal)

If liquid line is cooler than body temperature, refer to

“Head Pressure Control Valve” on page 172.

2. Ice fill pattern normal?

Refer to “Ice Formation Pattern” on page 110.

3. Freeze time normal?

“Cycle Times/24-Hour Ice Production/Refrigerant

Pressure Charts” on page 201.

Shorter freeze cycles - Refer to “Head Pressure

Control Valve” on page 172.

Longer freeze cycles - Refer to “Water

System Checklist” on page 109 then refer to

“Troubleshooting By Symptom” on page 92.

4. Harvest time is longer than normal and control board

indicates Long Harvest?

“Cycle Times/24-Hour Ice Production/Refrigerant

Pressure Charts” on page 201.

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178 Part Number: 000015430 Rev 04 4/22

5. Discharge line temperature is greater than 150°F

(66°C) [22" Models Only - 140°F (60°C)] at the end of

the freeze cycle?

See “Discharge Line Temperature Analysis” on

page 123.

6. Connect refrigeration manifold gauge set to the

access valves on the front of the ice machine.

Establish baseline by recording suction and discharge

pressure and freeze & harvest cycle times. (Refer to

“Cycle Times/24-Hour Ice Production/Refrigerant

Pressure Charts” on page 201 for data collection

detail.)

7. Freeze cycle Head Pressure is in the range indicated in

the cycle time/24 hour ice production and operational

pressure chart?

If the head pressure is low refer to “Freeze Cycle

Discharge Pressure Low Checklist” on page 116.

8. Freeze cycle Suction Pressure normal?

Refer to “Analyzing Suction Pressure” on page 117 if

suction pressure is high or low.

9. Harvest cycle suction and discharge pressures are

lower than indicated in the cycle times/refrigerant

pressures/24 hour ice production chart?

Replace Harvest Pressure Regulating solenoid.

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Part Number: 000015430 Rev 04 4/22 179

WATER REGULATING VALVE

Water-Cooled Models Only

FUNCTION

The water regulating valve maintains the freeze cycle

discharge pressure.

CHECK PROCEDURE

1. Determine if the head pressure is high or low (refer

to cycle time/24 hour ice production and operational

pressure chart for the model you are servicing).

2. Verify the condenser water meets specifications.

3. Adjust valve to increase or decrease discharge

pressure.

4. Using the information gathered, refer to the list for

diagnosis.

Problem (Freeze Cycle)

Valve not maintaining discharge pressure.

• Valve incorrectly set, dirty or defective. Adjust, clean

or replace valve.

Discharge pressure extremely high; Liquid line entering

receiver feels hot.

• Water regulating valve incorrectly set or not opening.

Discharge pressure low, Liquid line entering receiver feels

warm to hot.

• Ice machine low on charge. Verify “Replacing Pressure

Controls Without Removing Refrigerant Charge” on

page 198.

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180 Part Number: 000015430 Rev 04 4/22

Refrigerant Recovery/Evacuation

DEFINITIONS

Recover

To remove refrigerant, in any condition, from a system and

store it in an external container, without necessarily testing

or processing it in any way.

Recycle

To clean refrigerant for re-use by oil separation and single

or multiple passes through devices, such as replaceable

core filter-driers, which reduce moisture, acidity and

particulate matter. This term usually applies to procedures

implemented at the field job site or at a local service shop.

Reclaim

To reprocess refrigerant to new product specifications (see

below) by means which may include distillation. A chemical

analysis of the refrigerant is required after processing to be

sure that product specifications are met. This term usually

implies the use of processes and procedures available only

at a reprocessing or manufacturing facility.

Chemical analysis is the key requirement in this definition.

Regardless of the purity levels reached by a reprocessing

method, refrigerant is not considered “reclaimed” unless it

has been chemically analyzed and meets ARI Standard 700

(latest edition).

New Product Specifications

This means ARI Standard 700 (latest edition). Chemical

analysis is required to assure that this standard is met.

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Part Number: 000015430 Rev 04 4/22 181

REFRIGERANT REUSE POLICY

Manitowoc recognizes and supports the need for proper

handling, re-use, and disposal of refrigerants. Manitowoc

service procedures require recapturing refrigerants, not

venting them to the atmosphere. It is not necessary, in or

out of warranty, to reduce or compromise the quality and

reliability of your customers’ products to achieve this.

Notice

Manitowoc assumes no responsibility for use of

contaminated refrigerant. Damage resulting from the

use of contaminated, recovered, or recycled refrigerant

is the sole responsibility of the servicing company.

Manitowoc approves the use of:

1. New Refrigerant

• Must be of original nameplate type.

2. Reclaimed Refrigerant

• Must be of original nameplate type.

• Must meet ARI Standard 700 (latest edition)

specifications.

3. Recovered or Recycled Refrigerant

• Must be recovered or recycled in accordance with

current local, state and federal laws.

• Must be recovered from and re-used in the same

Manitowoc product. Re-use of recovered or

recycled refrigerant from other products is not

approved.

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182 Part Number: 000015430 Rev 04 4/22

4. Recovered refrigerant must come from a

“contaminant-free” system. To decide whether the

system is contaminant free, consider:

• Type(s) of previous failure(s)

• Whether the system was cleaned, evacuated and

recharged properly following failure(s).

• Whether the system has been contaminated by

this failure.

• Compressor motor burnouts and improper past

service prevent refrigerant re-use.

Refer to “Determining Severity Of Contamination” on

page 191 to test for contamination.

5. “Substitute” or “Alternative” Refrigerant

• Must use only Manitowoc-approved alternative

refrigerants.

• Must follow Manitowoc-published conversion

procedures.

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Part Number: 000015430 Rev 04 4/22 183

SELFCONTAINED MODEL PROCEDURE

Do not purge refrigerant to the atmosphere. Capture

refrigerant using recovery equipment. Follow the

manufacturer’s recommendations.

Notice

Manitowoc assumes no responsibility for the use of

contaminated refrigerant. Damage resulting from the

use of contaminated refrigerant is the sole responsibility

of the servicing company.

Notice

Replace the liquid line drier after recovering the

refrigerant and before evacuating and recharging. Use

only a Manitowoc (OEM) liquid line filter-drier to prevent

voiding the warranty.

Connections

Manifold gauge sets must utilize low loss fittings to comply

with local rules and regulations.

Make these connections:

• Suction side of the compressor through the suction

access valve.

• Discharge side of the compressor through the

discharge access valve.

• Liquid side through the liquid line drier.

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184 Part Number: 000015430 Rev 04 4/22

Self-Contained Recovery/Evacuation

1. Press the Power button and cycle the ice machine off.

2. Install manifold gauge, scale and recovery unit or two-

stage vacuum pump and open high, low and charging

ports.

3. Perform recovery or evacuation:

A. Recovery: Operate the recovery unit as directed

by the manufacturer’s instructions.

B. Evacuation prior to recharging: Pull the system

down to 500 microns. Then, allow the pump to

run for an additional half hour. Turn off the pump

and perform a standing vacuum leak check.

4. Follow the Charging Procedures.

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Part Number: 000015430 Rev 04 4/22 185

Self-Contained Charging Procedures

Notice

The charge is critical on all Manitowoc ice machines. Use

a scale to ensure the proper charge is installed.

1. Be sure the ice machine is off.

2. Isolate the vacuum pump valve, low side and high

side access valves from the refrigeration system. The

refrigerant charging access valve remains open.

3. Open the refrigerant cylinder and add the proper

refrigerant charge (shown on nameplate) through the

liquid line drier.

Caution

Damage may occur when charging liquid into the front

discharge line access port.

Manitowoc replacement driers have a Schrader valve

built into the inlet of the drier. Filter driers without an

access port must be replaced with the current OEM part

before recharging the ice machine. All Liquid refrigerant

must be added through the liquid line drier access port.

4. Let the system “settle” for 2 to 3 minutes.

5. Isolate the refrigerant cylinder/charging hose from

the liquid line drier.

6. Press the Power button.

NOTE: Manifold gauge set must be removed properly to

ensure that no refrigerant contamination or loss occurs.

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186 Part Number: 000015430 Rev 04 4/22

7. Make sure that all of the vapor in the charging hoses

is drawn into the ice machine before disconnecting

the charging hoses.

A. Run the ice machine in freeze cycle.

B. Remove the high side low loss fitting from the

liquid line filter drier.

C. Open the high and low side valves on the

manifold gauge set. Any refrigerant in the lines

will be pulled into the low side of the system.

D. Allow the pressures to equalize while the ice

machine is in the freeze cycle.

E. Remove the hoses from the ice machine and

install the caps.

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Part Number: 000015430 Rev 04 4/22 187

REMOTE CONDENSER MODEL PROCEDURE

Refrigerant Recovery/Evacuation

Do not purge refrigerant to the atmosphere. Capture

refrigerant using recovery equipment. Follow the

manufacturer’s recommendations.

Notice

Manitowoc Ice assumes no responsibility for the use of

contaminated refrigerant. Damage resulting from the

use of contaminated refrigerant is the sole responsibility

of the servicing company.

Notice

Replace the liquid line drier after recovering the

refrigerant and before evacuating and recharging. Use

only a Manitowoc (O.E.M.) liquid line filter drier to

prevent voiding the warranty.

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188 Part Number: 000015430 Rev 04 4/22

CONNECTIONS

Notice

Recovery/evacuation of a remote system requires

connections at four points for complete system

evacuation.

Make these connections:

• Suction side of the compressor through the suction

service valve.

• Discharge side of the compressor through the

discharge service valve.

• Receiver outlet service valve, which evacuates the

area between the check valve in the liquid line and the

liquid line solenoid.

• Access (Schrader) valve on the discharge line

quick-connect fitting, located on the outside of the

compressor/evaporator compartment. This connection

evacuates the condenser. Without it, the magnetic

check valves would close when the pressure drops

during evacuation, preventing complete evacuation of

the condenser.

NOTE: Manitowoc recommends using an access valve core

removal and installation tool on the discharge line quick-

connect fitting. This permits access valve core removal.

This allows for faster evacuation and charging, without

removing the manifold gauge hose.

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Part Number: 000015430 Rev 04 4/22 189

REMOTE CONDENSER RECOVERY/EVACUATION

1. Press the Power button to stop the ice machine.

2. Install manifold gauge set, scale and recovery unit or

two-stage vacuum pump.

3. Open high and low side on the manifold gauge set.

4. Perform recovery or evacuation:

A. Recovery: Operate the recovery unit as directed

by the manufacturer’s instructions.

B. Evacuation prior to recharging: Pull the system

down to 500 microns. Then, allow the pump to

run for an additional hour. Turn off the pump and

perform a standing vacuum leak check.

NOTE: Check for leaks with an electronic leak detector

after charging the ice machine.

5. Follow the Charging Procedures.

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190 Part Number: 000015430 Rev 04 4/22

Remote Charging Procedures

1. Close the vacuum pump valve and the low side

manifold gauge valve.

2. Open the refrigerant cylinder and add the proper

refrigerant charge (shown on nameplate) into the

system high side (receiver outlet valve/liquid line drier

and/or liquid line quick-connect fitting).

3. If the high side does not take the entire charge, close

the high side on the manifold gauge set and start the

ice machine. Add the remaining refrigerant through

the low side slowly until the machine is fully charged.

4. Verify all of the vapor in the charging hoses is drawn

into the refrigeration system before disconnecting the

charging hoses.

A. Run the ice machine in freeze cycle.

B. Remove the high side low loss fitting.

C. Open the high and low side valves on the

manifold gauge set. Any refrigerant in the lines

will be pulled into the low side of the system.

D. Allow the suction pressures in the refrigeration

system and the manifold gauge set to equalize

while the ice machine is in the freeze cycle.

E. Isolate and remove the low side hose.

F. Install access valve caps.

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Part Number: 000015430 Rev 04 4/22 191

System Contamination Clean-Up

General

This section describes the basic requirements for restoring

contaminated systems to reliable service.

Notice

Manitowoc Ice assumes no responsibility for the use of

contaminated refrigerant. Damage resulting from the

use of contaminated refrigerant is the sole responsibility

of the servicing company.

DETERMINING SEVERITY OF CONTAMINATION

System contamination is generally caused by either

moisture or residue from compressor burnout entering the

refrigeration system.

Inspection of the refrigerant usually provides the first

indication of system contamination. Obvious moisture or

an acrid odor in the refrigerant indicates contamination.

If harmful levels of contamination are suspected, perform

the following procedure.

1. Remove the refrigerant charge from the ice machine.

2. Remove the compressor from the system.

3. Check the odor and appearance of the oil.

4. Inspect open suction and discharge lines at the

compressor for burnout deposits.

5. If no signs of contamination are present, perform

an acid oil test to determine the type of cleanup

required.

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192 Part Number: 000015430 Rev 04 4/22

Contamination Cleanup Chart

Symptoms/Findings Required Cleanup Procedure

No symptoms or suspicion of

contamination

Normal evacuation/recharging

procedure

Moisture/Air Contamination

symptoms

Refrigeration system open to

atmosphere for longer than

15 minutes

Refrigeration test kit and/

or acid oil test shows

contamination

Leak in water cooled condenser

No burnout deposits in open

compressor lines

Mild contamination cleanup

procedure

Mild Compressor Burnout

symptoms

Oil appears clean but smells

acrid

Refrigeration test kit or acid oil

test shows harmful acid content

No burnout deposits in open

compressor lines

Mild contamination cleanup

procedure

Severe Compressor Burnout

symptoms

Oil is discolored, acidic, and

smells acrid

Burnout deposits found in the

compressor, lines, and other

components

Severe contamination cleanup

procedure

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Part Number: 000015430 Rev 04 4/22 193

CLEANUP PROCEDURE

Mild System Contamination

1. Replace any failed components.

2. If the compressor is good, change the oil.

Pour the oil from the compressor into a graduated

vessel and replace with the same amount removed.

3. Replace the liquid line drier.

NOTE: If the contamination is from moisture, use heat

lamps during evacuation. Position them at the compressor,

condenser and evaporator prior to evacuation. Do not

position heat lamps too close to plastic components, or

they may melt or warp.

Important

Dry nitrogen is required for this procedure to prevent

refrigerant release.

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194 Part Number: 000015430 Rev 04 4/22

4. Follow the normal evacuation procedure, except

replace the evacuation step with the following:

A. Pull vacuum to 1000 microns. Break the vacuum

with dry nitrogen and sweep the system.

Pressurize to a minimum of 5 psig (35 kPa,

.35 bar).

B. Pull vacuum to 500 microns. Break the vacuum

with dry nitrogen and sweep the system.

Pressurize to a minimum of 5 psig (35 kPa,

.35 bar).

C. Change the vacuum pump oil.

D. Pull vacuum to 500 microns. Run the vacuum

pump for 1/2 hour on self-contained models,

1 hour on remotes.

E. You may perform a standing vacuum test to

make a preliminary leak check. You should use an

electronic leak detector after system charging to

be sure there are no leaks.

5. Charge the system with the proper refrigerant to the

nameplate charge.

6. Operate the ice machine.

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Part Number: 000015430 Rev 04 4/22 195

Severe System Contamination

1. Remove the refrigerant charge.

2. Remove the compressor and inspect the refrigeration

lines. If burnout deposits are found, install a new

harvest valve, replace the manifold strainer, TXV and

harvest pressure regulating valve.

3. Wipe away any burnout deposits from suction and

discharge lines at compressor.

4. Sweep through the open system with dry nitrogen.

Important

Refrigerant sweeps are not recommended, as they

release refrigerant into the atmosphere.

5. Install a new compressor and new start components.

6. Install a suction line filter-drier with acid and moisture

removal capability. Place the filter drier as close to the

compressor as possible.

7. Install an access valve at the inlet of the suction line

drier.

8. Install a new liquid line drier.

Important

Dry nitrogen is required for this procedure. This will

prevent refrigerant release.

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196 Part Number: 000015430 Rev 04 4/22

9. Follow the normal evacuation procedure, except

replace the evacuation step with the following:

A. Pull vacuum to 1000 microns. Break the vacuum

with dry nitrogen and sweep the system.

Pressurize to a minimum of 5 psig (35 kPa,

.35 bar).

B. Change the vacuum pump oil.

C. Pull vacuum to 500 microns. Break the vacuum

with dry nitrogen and sweep the system.

Pressurize to a minimum of 5 psig (35 kPa,

.35 bar).

D. Change the vacuum pump oil.

E. Pull vacuum to 500 microns. Run the vacuum

pump for 1/2 hour on self-contained models, 1

hour on remotes.

NOTE: You may perform a standing vacuum test to make a

preliminary leak check. You should use an electronic leak

detector after system charging to be sure there are no

leaks.

10. Charge the system with the proper refrigerant to the

nameplate charge.

11. Operate the ice machine for one hour. Then, check

the pressure drop across the suction line filter-drier.

A. If the pressure drop is less than 1 psig (7 kPa,

.07 bar), the filter-drier should be adequate for

complete cleanup.

B. If the pressure drop exceeds 1 psig (7 kPa,

.07 bar), change the suction line filter-drier and

the liquid line drier. Repeat until the pressure

drop is acceptable.

12. Operate the ice machine for 48-72 hours. Then

remove the suction line drier and change the liquid

line drier.

13. Follow normal evacuation procedures.

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Part Number: 000015430 Rev 04 4/22 197

Liquid Line Filter-Driers

The filter-driers used on Manitowoc ice machines are

manufactured to Manitowoc specifications and have an

access fitting for charging with refrigerant. A Manitowoc

drier also has dirt-retaining filtration, with fiberglass filters

on both the inlet and outlet ends. This is very important

because ice machines have a back-flushing action that

takes place during every Harvest cycle.

A Manitowoc filter-drier has high moisture and acid

removal capability.

The size of the filter-drier is important. The refrigerant

charge is critical. Using an improperly sized filter-drier

will cause the ice machine to be improperly charged with

refrigerant.

Important

Driers are covered as a warranty part. The drier must be

replaced any time the system is opened for repairs.

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198 Part Number: 000015430 Rev 04 4/22

Replacing Pressure Controls Without Removing

Refrigerant Charge

This procedure reduces repair time and cost. Use it when

any of the following components require replacement, and

the refrigeration system is operational and leak-free.

• Fan cycle control (air cooled only)

• Water regulating valve (water cooled only)

• High pressure cut-out control

• High side service valve

1. Disconnect power to the ice machine.

2. Follow all manufacturer’s instructions supplied with

the pinch-off tool. Position the pinch-off tool around

the tubing as far from the pressure control as feasible.

Clamp down on the tubing until the pinch-off is

complete.

Warning

Do not unsolder a defective component. Cut it out of the

system. Do not remove the pinch-off tool until the new

component is securely in place.

3. Cut the tubing of the defective component with a

small tubing cutter.

4. Solder the replacement component in place. Allow

the solder joint to cool.

5. Remove the pinch-off tool.

6. Re-round the tubing. The pressure control will operate

normally once the tubing is re-rounded. Tubing may

not re-round 100%.

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Part Number: 000015430 Rev 04 4/22 199

Total System Refrigerant Charge

This information is for reference only. Refer to the ice

machine serial number tag to verify the system charge.

Serial plate information overrides information listed on

these pages.

SELFCONTAINED AIR & WATER COOLED

Model

Refrigerant

Type

Air Cooled Water Cooled

IF0300 R404A 15 oz (.43 kg) 12 oz (.34 kg)

IT0300 60 Hz R410A 14 oz (.40 kg) 12 oz (.34 kg)

IT0300 50 Hz R410A 16 oz (.45 kg) ---

IT0420 R410A 18 oz (.51 kg) 18 oz (.51 kg)

IT0450 R410A 18 oz (.51 kg) 15 oz (.43 kg)

IT0500 R410A 19 oz (.54 kg) 24 oz (.68 kg)

IF0600 R404A 32 oz (.91 kg) 26 oz (.74 kg)

IT0620 R410A 19 oz (.54 kg) 13 oz (.37 kg)

IT0750 60 Hz R410A 20 oz (.57 kg) 26 oz (.74 kg)

IT0750 50 Hz* R410A 22 oz (.62 kg)

26 oz (.74 kg)

32 oz. (.91 kg)

IF0900 R404A 34 oz (.96 kg) 26 oz (.74 kg)

IT0900 60 Hz R410A 32 oz (.91 kg) 22 oz (.62 kg)

IT0900 50 Hz R410A 30 oz (.85 kg) 26 oz (.74 kg)

IT1200 60 Hz R410A 46 oz (1.30 kg) 40 oz (1.13 kg)

IT1200 50 Hz R410A 40 oz (1.13 kg) 40 oz (1.13 kg)

IT1500/1500E R410A 42 oz (1.19 kg 38 oz (1.08 kg

IT1500A R410A 46 oz (1.30 kg) 40 oz (1.13 kg)

IT1900/1900E R410A 44 oz (1.25 kg) 38 oz (1.08 kg)

IT1900A R410A --- 44 oz (1.25 kg)

* Verify compressors & serial numbers.

 Before SN1120647228,  After SN1120647228

000015430_04_indigoNXT_awr_hb_mii_en.indb 199000015430_04_indigoNXT_awr_hb_mii_en.indb 199 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

200 Part Number: 000015430 Rev 04 4/22

REMOTE CONDENSER

Model

Refrigerant

Type

Remote

Additional

Refrigerant

for Line Sets

51'-100'

Maximum

System

Charge

IF0500N R404A

6 lb

(2.72 kg)

1.5 lb

(680 g

7.5 lb

(3.40 kg)

IT0500N R410A

6 lb

(2.72 kg)

1.5 lb

(680 g)

7.5 lb

(3.40 kg)

IF0600N R404A

7 lbs

(3.18 kg)

2 lb

(907 g)

9 lb

(4.08 kg)

IF0600N R404A

7 lbs

(3.18 kg)

2 lb

(907 g)

9 lb

(4.08 kg)

IF0900N

50 Hz

R404A

7 lbs

(3.18 kg)

2 lb

(907 g)

8 lb

(3.62 kg)

IT1200N R410A

7.5 lb

(3.4 kg)

2 lb

(907 g)

9.5 lb

(4.31 kg)

IT1500N R410A

7 lb

(3.18 kg)

2 lb

(907 g)

9 lb

(4.08 kg)

IT1500N-A R410A

8 lb

(3.62 kg)

2 lb

(907 g)

10 lb

(4.53 kg)

IT1500N-E R410A

7.5 lb

(3.4 kg)

11.75 lb

(5.33 kg)

2 lb

(907 g)

9.5 lb

(4.31 kg)

13.75 lb

(6.24 kg)

IT1900N R410A

8 lb

(3.62 kg)

2 lb

(907 g)

10 lb

(4.53 kg)

IT1900N-A R410A

8 lb

(3.62 kg)

2 lb

(907 g)

10 lb

(4.53 kg)

IT1900N-E R410A

8 lb

(3.62 kg)

12.75 lb

(5.78 kg)

2 lb

(907 g)

10 lb

(4.53 kg)

14.75 lb

(6.7 kg)

* Verify compressors & serial numbers.

 Before SN1120837623,  After SN1120837623

000015430_04_indigoNXT_awr_hb_mii_en.indb 200000015430_04_indigoNXT_awr_hb_mii_en.indb 200 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

Part Number: 000015430 Rev 04 4/22 201

Cycle Times/24-Hour Ice Production/

Refrigerant Pressure Charts

These charts are used as guidelines to verify correct ice

machine operation.

Accurate collection of data is essential to obtain the

correct diagnosis.

• Production and cycle times are for dice cube - Half dice

cube cycle times can be 2 - 3 minutes faster, depending

on model and ambient temperature.

• Regular cube production derate is 7%.

• Ice production checks that are within 10% of the chart

are considered normal. This is due to variances in

water and air temperature. Actual temperatures will

seldom match the chart exactly.

• Refer to "Symptom #2 - Freeze Cycle Refrigeration

System Operational Analysis Tables" on page 99 for

the list of data that must be collected for refrigeration

diagnostics.

• Zero out manifold gauge set before obtaining pressure

readings to avoid mis-diagnosis.

• Discharge and suction pressure are highest at the

beginning of the cycle. Suction pressure will drop

throughout the cycle. Verify the pressures are within

the range indicated.

• Record beginning of freeze cycle suction pressure one

minute after water pump energizes.

• 50 Hz dice and half dice production derate is 12%.

• 50 Hz regular cube total production derate is 14%.

Charts

000015430_04_indigoNXT_awr_hb_mii_en.indb 201000015430_04_indigoNXT_awr_hb_mii_en.indb 201 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

202 Part Number: 000015430 Rev 04 4/22

IF0300 SERIES

IF0300A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.6-11.5 10.8-12.9 12.3-14.6

1-2.5

80/27 10.6-12.6 12.3-14.6 13.5-16.0

90/32 11.8-14.0 13.9-16.4 15.0-17.7

100/38 13.2-15.7 14.6-17.3 16.2-19.2

110/43 15.0-17.7 15.8-18.7 17.7-20.9

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 310 280 250

80/27 285 250 230

90/32 260 225 210

100/38 235 215 195

110/43 210 200 180

1 Based on average ice slab weight of 2.40 - 2.80 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 195-245 50-20 135-160 75-100

70/21 195-260 50-20 135-165 80-110

80/27 220-290 60-24 150-170 90-120

90/32 240-320 60-25 170-195 115-135

100/38 285-370 70-28 200-220 130-155

110/43 330-415 78-32 230-250 150-175

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 202000015430_04_indigoNXT_awr_hb_mii_en.indb 202 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

Part Number: 000015430 Rev 04 4/22 203

IF0300W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 10.0-11.9 11.1-13.2 12.3-14.6

1-2.5

80/27 10.2-12.2 11.3-13.4 12.3-14.6

90/32 10.4-12.4 11.8-14.0 12.6-15.0

100/38 10.6-12.6 11.8-14.0 12.6-15.7

110/43 10.8-12.9 11.8-14.0 12.9-15.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 300 275 250

80/27 295 270 250

90/32 290 260 245

100/38 285 260 245

110/43 280 260 240

1 Based on average ice slab weight of 2.40 - 2.80 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 225-235 50-25 130-170 75-100

70/21 225-235 50-28 130-170 85-100

80/27 225-245 65-29 130-180 85-110

90/32 230-250 65-30 135-180 85-115

100/38 230-260 70-31 145-190 90-120

110/43 235-260 70-31 150-190 90-120

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 230 psig

3 Condenser Water Usage = 193 gal/100 lb ice @ 90°/70°F

000015430_04_indigoNXT_awr_hb_mii_en.indb 203000015430_04_indigoNXT_awr_hb_mii_en.indb 203 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

204 Part Number: 000015430 Rev 04 4/22

IT0300 SERIES

IT0300A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.6-11.5 10.8-12.9 12.3-14.6

1-2.5

80/27 10.6-12.6 12.3-14.6 13.5-16.0

90/32 11.8-14.0 13.9-16.4 15.0-17.7

100/38 13.2-15.7 14.6-17.3 16.2-19.2

110/43 15.0-17.7 15.8-18.7 17.7-20.9

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 310 280 250

80/27 285 250 230

90/32 260 225 210

100/38 235 215 195

110/43 210 200 180

1 Based on average ice slab weight of 2.40 - 2.80 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 260-340 70-40 155-180 145-165

70/21 265-340 85-40 155-200 140-175

80/27 300-380 85-41 160-200 145-175

90/32 330-395 90-42 170-200 150-175

100/38 430-490 95-44 210-240 185-220

110/43 430-515 105-48 215-240 185-220

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 204000015430_04_indigoNXT_awr_hb_mii_en.indb 204 5/23/2022 2:35:30 PM5/23/2022 2:35:30 PM

Part Number: 000015430 Rev 04 4/22 205

IT0300W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 10.0-11.9 11.1-13.2 12.3-14.6

1-2.5

80/27 10.2-12.2 11.3-13.4 12.3--14.6

90/32 10.4-12.4 11.8-14.0 12.3-15.0

100/38 10.6-12.6 11.8-14.0 12.6-15.7

110/43 10.8-12.9 11.8-14.0 12.9-15.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 300 275 250

80/27 295 270 250

90/32 290 260 245

100/38 285 260 245

110/43 280 260 240

1 Based on average ice slab weight of 2.40 - 2.80 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 325-335 65-40 140-155 130-145

70/21 325-335 75-40 150-165 130-155

80/27 325-340 80-40 150-165 130-155

90/32 330-345 85-40 150-170 130-155

100/38 330-345 85-40 150-170 130-155

110/43 330-345 90-40 150-175 130-155

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 230 psig

3 Condenser Water Usage = 193 gal/100 lb ice @ 90°/70°F

000015430_04_indigoNXT_awr_hb_mii_en.indb 205000015430_04_indigoNXT_awr_hb_mii_en.indb 205 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

206 Part Number: 000015430 Rev 04 4/22

IT0420 SERIES

IT0420A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.9-10.4 10.4-12.2 13.1-15.3

1-2.5

80/27 9.9-11.6 11.4-13.3 13.6-15.8

90/32 10.7-12.5 13.6-15.8 13.8-16.1

100/38 12.1-14.1 13.8-16.1 14.3-16.6

110/43 12.9-15.0 14.0-16.3 14.8-17.2

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 470 410 335

80/27 430 380 325

90/32 400 325 320

100/38 360 320 310

110/43 340 315 300

1 Based on average ice slab weight of 3.40 - 3.90 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 270-340 60-30 145-170 115-135

70/21 280-340 70-36 160-190 120-140

80/27 335-365 70-38 180-205 120-160

90/32 350-410 80-40 185-210 180-210

100/38 460-500 80-45 265-290 180-210

110/43 460-520 80-45 270-290 180-220

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 206000015430_04_indigoNXT_awr_hb_mii_en.indb 206 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 207

IT0420W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.3-10.8 10.2-11.9 11.6-13.5

1-2.5

80/27 9.5-11.1 10.4-12.2 11.7-13.7

90/32 9.8-11.4 10.7-12.5 11.9-13.9

100/38 10.0-11.7 11.1-12.9 12.5-14.5

110/43 10.3-12.0 11.4-13.3 12.3-14.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 455 420 375

80/27 445 410 370

90/32 435 400 365

100/38 425 390 350

110/43 415 380 355

1 Based on average ice slab weight of 3.40 - 3.90 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 330 70-38 155-180 120-145

70/21 330-340 70-39 175-195 130-150

80/27 330-345 70-40 175-200 130-150

90/32 330-345 75-40 175-200 130-150

100/38 330-350 75-44 175-200 130-150

110/43 330-350 75-45 175-200 135-150

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 330 psig

000015430_04_indigoNXT_awr_hb_mii_en.indb 207000015430_04_indigoNXT_awr_hb_mii_en.indb 207 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

208 Part Number: 000015430 Rev 04 4/22

IT0450 SERIES

IT0450A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.9-10.4 9.9-11.6 10.9-12.7

1-2.5

80/27 9.9-11.6 10.9-12.7 11.9-13.9

90/32 10.7-12.5 12.1-14.1 13.1-15.3

100/38 11.7-13.7 13.3-15.5 14.6-16.9

110/43 13.1-15.3 14.3-16.6 15.1-17.5

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 470 430 395

80/27 430 395 365

90/32 400 360 335

100/38 370 330 305

110/43 335 310 295

1 Based on average ice slab weight of 3.40 - 3.90 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 260-335 60-28 145-160 105-125

70/21 260-340 70-32 160-180 120-145

80/27 280-360 75-38 170-190 130-150

90/32 360-400 80-40 175-200 135-160

100/38 440-500 85-42 250-270 185-210

110/43 450-520 85-43 250-280 185-215

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 208000015430_04_indigoNXT_awr_hb_mii_en.indb 208 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 209

IT0450W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.9-11.6 11.1-12.9 12.1-14.1

1-2.5

80/27 10.2-11.9 11.6-13.5 12.5-14.5

90/32 10.3-12.0 12.1-14.1 12.9-15.0

100/38 10.4-12.2 12.5-14.5 13.3-15.5

110/43 10.7-12.5 12.9-15.0 14.3-16.6

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 430 390 360

80/27 420 375 350

90/32 415 360 340

100/38 410 350 330

110/43 400 340 310

1 Based on average ice slab weight of 3.40 - 3.90 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 330-335 70-35 155-180 125-150

70/21 330-335 70-35 165-190 125-155

80/27 330-335 70-36 165-190 125-155

90/32 330-335 75-38 170-190 130-155

100/38 330-335 75-39 170-195 130-155

110/43 330-350 85-42 170-200 130-165

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 330 PSIG

000015430_04_indigoNXT_awr_hb_mii_en.indb 209000015430_04_indigoNXT_awr_hb_mii_en.indb 209 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

210 Part Number: 000015430 Rev 04 4/22

IT0500 SERIES

IT0500A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 11.2-12.9 13.1-15.0 14.5-16.5

1-2.5

80/27 12.3-14.1 14.5-16.5 14.9-17.0

90/32 13.2-15.1 15.1-17.2 16.9-19.3

100/38 14.7-16.8 16.9-19.3 18.6-21.2

110/43 15.5-17.7 18.0-20.5 20.2-23.1

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹ ²

50/10 70/21 90/32

70/21 520 455 415

80/27 480 415 405

90/32 450 400 360

100/38 410 360 330

110/43 390 340 305

1 Based on average ice slab weight of 4.60 - 5.20 lb.

2 230/50/1 is approximately 12% lower than 230/60/1

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 260-340 70-38 130-150 110-120

70/21 265-350 75-38 140-165 110-135

80/27 310-375 80-39 160-190 120-155

90/32 345-400 85-40 175-200 140-165

100/38 410-500 90-48 240-260 150-195

110/43 455-510 95-48 245-260 170-200

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 210000015430_04_indigoNXT_awr_hb_mii_en.indb 210 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 211

IT0500W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 11.7-13.5 13.9-15.9 15.9-18.2

1-2.5

80/27 12.3-14.1 14.5-16.5 16.4-18.7

90/32 12.4-14.3 15.1-17.2 16.9-19.3

100/38 12.6-14.4 15.5-17.7 17.4-19.9

110/43 12.9-14.8 15.9-18.2 18.0-20.5

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹ ²

50/10 70/21 90/32

70/21 500 430 380

80/27 480 415 370

90/32 475 400 360

100/38 470 390 350

110/43 460 380 340

1 Based on average ice slab weight of 4.60 - 5.20 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 330 75-38 165-175 135-150

70/21 330-335 75-40 165-180 135-155

80/27 330-350 80-41 180-190 140-160

90/32 330-335 80-42 180-190 145-160

100/38 330-335 80-43 180-190 145-160

110/43 330-350 85-43 185-210 150-175

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 230 PSIG

000015430_04_indigoNXT_awr_hb_mii_en.indb 211000015430_04_indigoNXT_awr_hb_mii_en.indb 211 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

212 Part Number: 000015430 Rev 04 4/22

IT0500N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

-20/-29 to 70/21 11.5-13.2 12.2-13.9 13.6-15.5

1-2.5

80/27 12.2-13.9 12.6-14.4 14.1-16.1

90/32 12.6-14.4 13.2-15.1 14.7-16.8

100/38 13.1-15.0 14.1-16.1 15.3-17.5

110/43 13.6-15.5 14.5-16.5 15.9-18.2

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

-20/-29 to 70/21 510 485 440

80/27 485 470 425

90/32 470 450 410

100/38 455 425 395

110/43 440 415 380

1 Based on average ice slab weight of 4.60 - 5.20 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20 to 50

-29 to 10

270-280 60-38 195-205 130-145

70/21 300-315 70-42 215-230 145-160

80/27 300-320 75-42 220-240 145-160

90/32 315-360 75-44 220-240 145-160

100/38 395-460 80-51 240-260 155-175

110/43 380-470 90-52 240-260 155-175

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 212000015430_04_indigoNXT_awr_hb_mii_en.indb 212 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 213

IF0500 SERIES

IF0500N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

-20/-29 to 70/21 12.3-14.1 12.7-14.7 13.7-15.8

1-2.5

90/32 12.4-14.3 13.9-15.9 14.7-17.0

100/38 12.8-14.9 14.1-16.3 15.2-17.7

110/43 13.3-15.4 14.5-16.7 16.0-18.5

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

-20/-29 to 70/21 480 445 415

90/32 455 430 390

100/38 440 405 375

110/43 425 395 360

1 Based on average ice slab weight of 4.60 - 5.20 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20 to 50

-29 to 10

205-220 50-32 100-150 75-100

70/21 240-260 60-32 110-160 75-100

80/27 240-270 60-32 110-160 75-100

90/32 250-270 60-32 120-160 80-100

100/38 300-375 85-35 130-170 80-100

110/43 310-375 90-36 130-170 80-100

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 213000015430_04_indigoNXT_awr_hb_mii_en.indb 213 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

214 Part Number: 000015430 Rev 04 4/22

IF0600 SERIES

IF0600A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.6-9.0 9.5-11.2 10.2-12.0

1-2.5

80/27 8.8-10.4 9.9-11.7 10.5-12.3

90/32 9.7-11.4 11.0-12.9 11.4-13.4

100/38 11.1-13.1 12.3-14.4 12.8-15.0

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 650 540 505

80/27 575 520 495

90/32 530 475 460

100/38 470 430 415

1 Based on average ice slab weight of 4.12 - 4.75 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 220-255 45-27 140-160 60-80

70/21 220-270 45-28 145-170 70-90

80/27 230-300 50-30 165-185 75-95

90/32 265-345 54-32 180-215 80-105

100/38 300-395 60-35 210-245 85-120

110/43 340-430 65-39 240-280 100-140

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 214000015430_04_indigoNXT_awr_hb_mii_en.indb 214 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 215

IF0600W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.6-9.0 9.0-10.6 9.7-11.4

1-2.5

80/27 8.8-10.4 9.1-10.7 9.9-11.7

90/32 9.6-10.6 9.1-10.7 9.9-11.7

100/38 9.1-10.7 9.5-11.2 10.2-12.0

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 650 565 530

80/27 575 560 520

90/32 565 560 520

100/38 560 540 505

1 Based on average ice slab weight of 4.12 - 4.75 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 240-250 36-26 140-190 65-95

70/21 240-250 36-26 140-190 65-95

80/27 240-250 40-28 150-195 70-100

90/32 245-255 40-29 160-200 70-100

100/38 245-260 40-30 170-205 75-105

110/43 245-265 40-30 180-210 80-110

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 240 psig

3 Condenser Water Usage = 157 gal/100 lb ice @ 90°/70°F

000015430_04_indigoNXT_awr_hb_mii_en.indb 215000015430_04_indigoNXT_awr_hb_mii_en.indb 215 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

216 Part Number: 000015430 Rev 04 4/22

IF0600N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

-20/-29 to 70/21 7.9-9.4 9.9-11.7 10.5-12.3

1-2.5

80/27 9.0-10.6 9.9-11.7 10.7-12.6

90/32 9.1-10.7 9.9-11.7 10.7-12.6

100/38 9.9-11.7 10.9-12.8 11.7-13.7

110/43 10.9-12.8 12.0-14.0 12.8-15.0

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

-20/-29 to 70/21 630 520 495

80/27 565 520 485

90/32 560 520 485

100/38 520 480 450

110/43 480 440 415

1 Based on average ice slab weight of 4.12 - 4.75 lb.

2 Ratings with JC0895 condenser dice cubes

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20/-29 to

50/10

210-240 40-29 130-190 62-80

70/21 225-250 50-30 130-200 75-95

80/27 245-275 52-31 130-200 75-100

90/32 245-285 52-32 135-200 80-100

100/38 260-315 55-32 140-200 80-100

110/43 290-365 60-34 170-200 85-100

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 216000015430_04_indigoNXT_awr_hb_mii_en.indb 216 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 217

IT0620 SERIES

IT0620A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.2-8.5 7.9-9.3 8.2-9.6

1-2.5

80/27 7.9-9.3 8.7-10.2 9.0-10.6

90/32 8.5-10.0 9.4-11.0 9.8-11.4

100/38 9.4-11.0 10.4-12.2 10.9-12.7

110/43 9.9-11.6 11.1-12.9 12.7-14.8

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 560 520 505

80/27 520 480 465

90/32 490 450 435

100/38 450 410 395

110/43 430 390 345

1 Based on average ice slab weight of 3.4 - 3.9 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 255-335 60-30 155-170 105-130

70/21 270-340 70-30 170-200 115-135

80/27 270-340 75-35 170-200 115-135

90/32 350-405 75-38 205-240 140-155

100/38 450-520 90-40 290-340 160-235

110/43 450-540 90-42 290-340 160-235

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 217000015430_04_indigoNXT_awr_hb_mii_en.indb 217 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

218 Part Number: 000015430 Rev 04 4/22

IT0620W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.6-8.9 8.7-10.2 9.6-11.3

1-2.5

80/27 7.7-9.0 9.0-10.6 10.0-11.7

90/32 7.7-9.1 9.4-11.0 10.4-12.2

100/38 7.9-9.3 9.6-11.3 10.7-12.5

110/43 8.1-9.5 9.9-11.6 11.1-12.9

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 540 480 440

80/27 535 465 425

90/32 530 450 410

100/38 520 440 400

110/43 510 430 390

1 Based on average ice slab weight of 3.4 - 3.9 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 330-335 60-32 155-180 115-140

70/21 330-335 60-34 160-200 125-145

80/27 330-340 60-34 160-200 125-145

90/32 330-340 65-35 170-200 125-150

100/38 330-345 75-41 170-200 125-150

110/43 330-355 80-42 170-200 125-150

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 330 PSIG

000015430_04_indigoNXT_awr_hb_mii_en.indb 218000015430_04_indigoNXT_awr_hb_mii_en.indb 218 5/23/2022 2:35:31 PM5/23/2022 2:35:31 PM

Part Number: 000015430 Rev 04 4/22 219

IT0750 SERIES

IT0750A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.2-8.6 8.1-9.5 8.8-10.4

1-2.5

80/27 7.9-9.4 8.6-10.1 9.3-10.9

90/32 8.6-10.1 9.5-11.2 10.1-11.9

100/38 9.5-11.2 10.6-12.5 11.1-13.1

110/43 10.2-12.0 11.1-13.1 11.8-13.9

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 680 620 575

80/27 630 590 550

90/32 590 540 510

100/38 540 490 470

110/43 505 470 445

1 Based on average ice slab weight of 4.12 - 4.75 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 270-345 70-30 150-170 105-130

70/21 270-345 70-30 155-175 105-130

80/27 300-375 70-34 155-175 115-130

90/32 345-410 75-37 175-195 135-145

100/38 420-510 90-40 190-205 145-175

110/43 440-530 100-40 195-210 145-175

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 219000015430_04_indigoNXT_awr_hb_mii_en.indb 219 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

220 Part Number: 000015430 Rev 04 4/22

IT0750W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.0-8.3 7.2-8.6 8.2-9.7

1-2.5

80/27 7.0-9.3 7.4-8.7 8.5-10.0

90/32 7.1-8.4 7.6-9.0 8.7-10.3

100/38 7.2-8.6 7.8-9.2 8.9-10.5

110/43 7.4-8.7 7.9-9.4 9.4-11.1

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 700 680 610

80/27 695 670 595

90/32 690 650 580

100/38 680 640 570

110/43 670 630 545

1 Based on average ice slab weight of 4.12 - 4.75 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 310-320 65-36 155-165 115-130

70/21 310-320 65-38 165-175 115-130

80/27 310-320 65-38 170-185 120-135

90/32 310-320 65-38 170-190 125-135

100/38 320-350 75-41 170-200 125-145

110/43 330-360 80-42 175-210 125-150

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 315 psig

000015430_04_indigoNXT_awr_hb_mii_en.indb 220000015430_04_indigoNXT_awr_hb_mii_en.indb 220 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 221

IF0900 SERIES

IF0900A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.7-10.3 10.2-12.1 10.8-12.8

1-2.5

80/27 9.7-11.5 10.5-12.4 11.1-13.1

90/32 10.5-12.4 11.9-14.1 12.2-14.5

100/38 11.3-13.4 12.3-14.6 12.7-15.0

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 875 765 725

80/27 800 745 710

90/32 745 665 650

100/38 695 645 630

1 Based on average ice slab weight of 6.2 - 7.2 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 220-255 45-27 125-140 60-80

70/21 220-270 45-30 150-160 75-90

80/27 230-300 50-30 150-160 80-100

90/32 260-315 55-32 160-175 90-115

100/38 300-395 74-34 180-220 130-160

110/43 320-400 78-34 200-230 130-160

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 221000015430_04_indigoNXT_awr_hb_mii_en.indb 221 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

222 Part Number: 000015430 Rev 04 4/22

IF0900W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.1-10.8 10.3-12.2 10.9-12.9

1-2.5

80/27 10.2-12.1 10.4-12.3 11.1-13.1

90/32 10.4-12.3 11.3-13.3 11.4-13.5

100/38 11.6-12.5 11.6-13.7 11.9-14.1

110/43 11.3-13.3 12.2-14.5 13.0-15.4

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 840 755 720

80/27 765 750 710

90/32 750 700 690

100/38 740 680 665

110/43 700 650 615

1 Based on average ice slab weight of 6.2 - 7.2 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 225-235 45-28 130-160 75-90

70/21 225-235 45-30 130-160 75-90

80/27 230-245 50-30 130-160 75-90

90/32 225-235 55-31 130-160 75-90

100/38 235-250 55-32 135-160 75-95

110/43 235-265 60-32 140-160 75-95

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 230 psig

3 Condenser Water Usage = 141 gal/100 lb ice @ 90°/70°F

000015430_04_indigoNXT_awr_hb_mii_en.indb 222000015430_04_indigoNXT_awr_hb_mii_en.indb 222 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 223

IF0900N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

-20/-29 to 70/21 9.4-11.1 10.2-12.1 11.0-12.9

0.75-2.0

80/27 9.8-11.6 10.4-12.3 11.3-13.3

90/32 10.4-12.3 10.7-12.7 11.7-13.9

100/38 10.9-12.9 11.6-13.7 12.2-14.5

110/43 11.5-13.6 12.2-14.5 13.0-15.4

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

-20/-29 to 70/21 820 765 720

80/27 790 750 700

90/32 750 730 675

100/38 720 680 650

110/43 685 650 615

1 Based on average ice slab weight of 6.2 - 7.2 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 225-260 60-30 120-145 70-90

70/21 225-260 60-30 120-145 75-90

80/27 245-270 60-31 120-145 75-90

90/32 250-285 60-32 125-145 75-95

100/38 285-350 65-34 135-165 75-100

110/43 310-375 70-36 145-170 75-100

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 223000015430_04_indigoNXT_awr_hb_mii_en.indb 223 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

224 Part Number: 000015430 Rev 04 4/22

IT0900 SERIES

IT0900A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.0-10.7 10.2-12.1 11.2-13.2

1-2.5

80/27 9.5-11.3 10.6-12.5 11.4-13.5

90/32 10.3-12.2 11.3-13.4 12.2-14.5

100/38 11.6-13.7 12.9-15.2 14.0-16.5

110/43 14.3-16.9 15.3-18.1 16.0-18.8

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 850 765 705

80/27 810 740 690

90/32 755 695 650

100/38 680 620 575

110/43 565 530 510

1 Based on average ice slab weight of 6.2 - 7.2 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 280-350 65-35 140-165 85-120

70/21 280-350 65-36 145-170 90-120

80/27 300-400 70-37 150-190 100-125

90/32 370-440 80-38 170-220 110-130

100/38 420-520 85-39 245-290 135-185

110/43 470-540 90-40 255-300 140-190

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 224000015430_04_indigoNXT_awr_hb_mii_en.indb 224 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 225

IT0900W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 9.9-11.8 10.4-12.3 12.0-14.2

1-2.5

80/27 10.0-11.9 10.6-12.5 12.2-14.5

90/32 10.1-12.0 11.9-14.1 12.5-14.7

100/38 10.2-12.1 12.2-14.5 12.9-15.2

110/43 10.3-12.2 12.8-15.1 13.3-15.6

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 780 750 660

80/27 775 740 650

90/32 770 665 640

100/38 760 650 620

110/43 755 625 605

1 Based on average ice slab weight of 6.2 - 7.2 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 315-320 67-35 140-175 100-120

70/21 315-320 70-36 145-175 105-120

80/27 315-320 75-36 145-175 105-120

90/32 315-320 80-38 150-175 110-120

100/38 315-320 85-38 155-180 110-125

110/43 315-320 90-38 160-185 110-125

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 230 psig

3 Condenser Water Usage = 141 gal/100 lb ice @ 90°/70°F

000015430_04_indigoNXT_awr_hb_mii_en.indb 225000015430_04_indigoNXT_awr_hb_mii_en.indb 225 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

226 Part Number: 000015430 Rev 04 4/22

IT1200 SERIES

IT1200A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.5-8.4 8.1-9.0 9.6-10.6

1-2.5

80/27 8.5-9.4 9.5-10.5 10.1-11.2

90/32 9.1-10.1 9.9-10.9 10.6-11.7

100/38 9.9-11.0 10.8-12.0 12.2-13.4

110/43 11.1-12.3 12.1-13.4 13.3-14.7

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1195 1125 975

80/27 1085 985 930

90/32 1020 950 895

100/38 945 875 790

110/43 855 795 730

1 Based on average ice slab weight of 7.5 - 8.2 lb.

2 230/50/1 is approximately 12% lower than 230/60/1

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 270-340 70-35 160-170 120-135

70/21 270-350 70-36 160-185 120-140

80/27 270-350 75-38 160-185 120-140

90/32 345-415 75-38 190-220 140-170

100/38 445-510 85-42 270-315 190-245

110/43 445-530 100-43 270-315 200-245

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 226000015430_04_indigoNXT_awr_hb_mii_en.indb 226 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 227

IT1200W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.5-9.4 9.6-10.7 10.6-11.7

1-2.5

80/27 8.5-9.5 9.8-10.9 10.6-11.8

90/32 8.6-9.5 10.5-11.6 10.7-11.8

100/38 8.6-9.6 10.6-11.8 10.8-12.0

110/43 8.7-9.6 10.7-11.8 11.0-12.2

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1080 970 895

80/27 1075 955 890

90/32 1070 900 885

100/38 1065 890 875

110/43 1060 885 865

1 Based on average ice slab weight of 7.5 - 8.2 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 330-335 65-36 155-165 125-135

70/21 330-335 65-38 155-165 125-135

80/27 330-335 75-38 155-170 120-135

90/32 330-335 75-39 155-170 125-135

100/38 330-335 75-40 155-170 125-140

110/43 330-345 80-42 155-175 125-140

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 330 PSIG

000015430_04_indigoNXT_awr_hb_mii_en.indb 227000015430_04_indigoNXT_awr_hb_mii_en.indb 227 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

228 Part Number: 000015430 Rev 04 4/22

IT1200N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.1-8.9 9.1-10.1 10.0-11.1

1-2.5

80/27 8.6-9.5 9.6-10.6 10.4-11.5

90/32 9.2-10.2 9.8-10.8 11.0-12.2

100/38 10.6-11.8 10.8-12.0 12.4-13.7

110/43 12.6-8.4 12.8-14.1 14.3-15.7

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1130 1015 940

80/27 1070 975 910

90/32 1010 960 865

100/38 890 875 775

110/43 840 755 685

1 Based on average ice slab weight of 7.5 - 8.2 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20 to 50

-29 to 10

265-280 65-42 170-180 120-130

70/21 305-330 65-42 180-195 120-145

80/27 310-345 70-44 180-205 115-155

90/32 310-380 75-45 185-205 120-155

100/38 400-460 80-50 200-215 140-155

110/43 405-475 90-50 200-220 145-160

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 228000015430_04_indigoNXT_awr_hb_mii_en.indb 228 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 229

IT1500 SERIES

IT1500A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 6.7-7.7 7.2-8.3 8.6-9.8

1-2.5

80/27 7.3-8.4 8.1-9.3 9.5-10.8

90/32 9.0-10.2 9.7-11.0 10.9-12.4

100/38 9.9-11.3 10.7-12.2 12.6-14.3

110/43 12.5-14.2 13.1-14.9 14.4-16.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹ ²

50/10 70/21 90/32

70/21 1800 1690 1460

80/27 1670 1540 1345

90/32 1410 1320 1190

100/38 1295 1205 1050

110/43 1055 1010 930

1 Based on average ice slab weight of 10.25 - 11.50 lb.

2 230/50/1 is approximately 12% lower than 230/60/1

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 260-340 60-38 150-160 110-120

70/21 260-340 65-40 160-170 115-125

80/27 300-380 70-40 185-200 130-145

90/32 360-425 75-42 195-205 135-155

100/38 415-500 85-44 220-240 165-180

110/43 435-530 90-45 240-250 170-190

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 229000015430_04_indigoNXT_awr_hb_mii_en.indb 229 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

230 Part Number: 000015430 Rev 04 4/22

IT1500W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.1-8.1 7.4-8.5 9.2-10.5

1-2.5

80/27 7.6-8.7 7.8-8.9 9.4-10.7

90/32 7.6-8.8 8.9-10.2 9.6-11.0

100/38 7.7-8.8 9.4-10.7 9.7-11.1

110/43 7.8-8.9 9.6-10.9 9.9-11.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1725 1655 1380

80/27 1625 1585 1360

90/32 1615 1420 1330

100/38 1605 1360 1315

110/43 1590 1335 1295

1 Based on average ice slab weight of 10.25 - 11.50 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 310-320 70-43 155-170 105-125

70/21 310-320 70-45 160-175 115-130

80/27 315-325 70-45 165-180 115-135

90/32 315-330 75-45 170-185 120-135

100/38 320-360 80-45 175-190 125-140

110/43 320-365 80-45 175-195 125-140

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 315 psig

000015430_04_indigoNXT_awr_hb_mii_en.indb 230000015430_04_indigoNXT_awr_hb_mii_en.indb 230 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

Part Number: 000015430 Rev 04 4/22 231

IT1500N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 7.1-8.2 7.6-8.8 8.8-10.0

1-2.5

80/27 7.6-8.7 8.1-9.2 9.3-10.6

90/32 8.1-9.3 8.8-10.0 9.9-11.3

100/38 8.8-10.0 9.3-10.6 10.5-12.0

110/43 8.9-10.2 9.9-11.3 11.0-12.7

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1710 1615 1435

80/27 1620 1545 1365

90/32 1530 1435 1295

100/38 1435 1365 1225

110/43 1420 1295 1170

1 Based on average ice slab weight of 10.25 - 11.50 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20/-29 280-300 65-40 180-200 100-135

50/10 300-315 65-41 190-205 100-140

70/21 305-320 65-42 190-205 110-150

80/27 310-345 70-44 190-205 115-155

90/32 315-350 75-45 190-205 120-155

100/38 410-470 85-48 190-210 130-155

110/43 415-480 90-50 195-215 135-155

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 231000015430_04_indigoNXT_awr_hb_mii_en.indb 231 5/23/2022 2:35:32 PM5/23/2022 2:35:32 PM

232 Part Number: 000015430 Rev 04 4/22

IT1900 SERIES

IT1900A

Self-Contained Air-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.5-9.7 9.7-11.0 10.4-11.8

1-2.5

80/27 8.9-10.2 10.9-12.4 11.7-13.4

90/32 10.0-11.4 12.0-13.6 13.5-15.3

100/38 12.0-13.6 13.8-15.6 15.7-17.8

110/43 14.8-16.8 16.1-18.2 17.0-19.3

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹ ²

50/10 70/21 90/32

70/21 1965 1750 1650

80/27 1875 1580 1505

90/32 1705 1470 1270

100/38 1460 1280 1135

110/43 1200 1110 1055

1 Based on average ice slab weight of 13.2 - 14.8 lb.

2 230/50/1 is approximately 12% lower than 230/60/1

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 265-340 55-33 160-175 100-120

70/21 270-345 60-34 165-180 110-130

80/27 300-410 65-36 180-200 120-140

90/32 335-420 75-38 200-210 130-150

100/38 390-515 80-44 230-250 160-180

110/43 425-525 85-45 250-260 170-185

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 232000015430_04_indigoNXT_awr_hb_mii_en.indb 232 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 233

IT1900W

Self-Contained Water-Cooled Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Around Ice

Machine °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.7-9.9 9.5-10.8 11.3-12.8

1-2.5

80/27 8.9-10.1 9.8-11.1 11.7-13.2

90/32 9.0-10.3 10.4-11.8 11.9-13.6

100/38 9.1-10.4 11.0-12.6 12.2-13.9

110/43 9.4-10.7 11.4-13.0 12.4-14.0

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Around Ice

Machine °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1900 1780 1535

80/27 1885 1735 1490

90/32 1865 1665 1400

100/38 1745 1560 1355

110/43 1790 1515 1315

1 Based on average ice slab weight of 13.2 - 14.8 lb.

OPERATING PRESSURES

Air Temp

Around Ice

Machine

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG ²

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

50/10 310-320 60-38 165-180 110-125

70/21 310-320 60-38 165-180 115-125

80/27 310-320 65-38 165-190 115-130

90/32 310-320 70-38 175-195 120-135

100/38 320-360 75-38 180-200 120-140

110/43 330-370 75-38 180-200 120-140

1 Suction pressure drops gradually throughout the freeze cycle

2 Water regulating valve set to maintain 315 psig

000015430_04_indigoNXT_awr_hb_mii_en.indb 233000015430_04_indigoNXT_awr_hb_mii_en.indb 233 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

234 Part Number: 000015430 Rev 04 4/22

IT1900N

Remote Air-Cooled Condenser Model

Characteristics vary depending on operating conditions.

CYCLE TIMES

Freeze Time + Harvest Time = Total Cycle Time

Air Temp.

Entering

Condenser °F/°C

Freeze Time

Harvest

Time ¹

Water Temperature °F/°C

50/10 70/21 90/32

70/21 8.9-10.1 9.4-10.7 11.0-12.5

1-2.5

80/27 9.4-10.7 10.0-11.4 11.8-13.4

90/32 10.2-11.6 10.8-12.3 12.9-14.6

100/38 11.7-13.4 12.6-14.3 14.0-15.8

110/43 13.7-15.5 14.0-15.8 14.3-16.2

1 Times in minutes

24 HOUR ICE PRODUCTION

Air Temp. Entering

Condenser °F/°C

Water Temperature °F/°C ¹

50/10 70/21 90/32

70/21 1830 1740 1520

80/27 1740 1650 1430

90/32 1625 1540 1320

100/38 1435 1350 1230

110/43 1250 1230 1205

1 Based on average ice slab weight of 13.2- 14.8 lb.

OPERATING PRESSURES

Air Temp

Entering

Condenser

°F/°C

Freeze Cycle Harvest Cycle

Discharge

Pressure

PSIG

Suction

Pressure

PSIG ¹

Discharge

Pressure

PSIG

Suction

Pressure

PSIG

-20/-29 260-290 65-38 170-180 110-130

50/10 270-330 70-38 170-180 115-130

70/21 280-340 75-38 170-180 120-130

80/27 320-400 75-39 170-190 130-150

90/32 345-420 75-40 170-195 140-155

100/38 395-480 85-46 180-210 140-155

110/43 405-485 85-47 180-215 140-155

1 Suction pressure drops gradually throughout the freeze cycle

000015430_04_indigoNXT_awr_hb_mii_en.indb 234000015430_04_indigoNXT_awr_hb_mii_en.indb 234 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 235

Wiring Diagrams

The following pages contain electrical wiring diagrams. Be

sure you are referring to the correct diagram for the ice

machine you are servicing.

Warning

Always disconnect power before working on electrical

circuitry.

Some components are wired differently on energy efficient

machines. Please verify your model number (page 19) to

reference the correct diagrams.

WIRING DIAGRAM LEGEND

The following symbols are used on all of the wiring

diagrams:

* Internal Compressor Overload

(Some models have external compressor

overloads)

** Fan Motor Run Capacitor

(Some models do not incorporate fan motor run

capacitor)

( ) Wire Number Designation

(The number is marked at each end of the wire)

—>>— Multi-Pin Connection

(Electrical Box Side) —>

(Compressor Compartment Side) >—

Diagrams

000015430_04_indigoNXT_awr_hb_mii_en.indb 235000015430_04_indigoNXT_awr_hb_mii_en.indb 235 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

236 Part Number: 000015430 Rev 04 4/22

IF0300/IT0420/IT0450/IT0500/IT0620/IT0750

1PH AIR/WATER

Self Contained Air & Water-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99)WHT

(77)

RED

(61) RED

(81)

WHT

(25) RED

(76)

BLK

(98)

GRY

(42)

ORG

(89)

PRPL

(88)

PRPL

(58) PRPL

(56) WHT

(74)

WHT

(75)WHT

(50) BLU

(C)

(S)

(R)

(49) RED

(48) BLK

(55) BLK

000014009_04

47 YEL

(80)

WHT

(51) ORG

(26)

WHT

(57) GRY

(89A) PRPL

(75A)WHT

(9) GRN

(8) WHT

(60)

BLK

(59)

ORG

(85) BLK

2121

000015430_04_indigoNXT_awr_hb_mii_en.indb 236000015430_04_indigoNXT_awr_hb_mii_en.indb 236 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 237

IF0300/IT0420/IT0450/IT0500/IT0620/IT0750

1ph Air/Water

Number Component

1 Air Pump Harvest Assist

3 Bin Switch

5 Compressor

7 Compressor Overload

9 Compressor PTCR

11 Compressor Run Capacitor

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

21 Disconnect Switch - Marine Models Only

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 237000015430_04_indigoNXT_awr_hb_mii_en.indb 237 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

238 Part Number: 000015430 Rev 04 4/22

IT0500/IT1200  1PH REMOTE AIRCOOLED

Remote Air-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99)WHT

(77)

RED

(61) RED

(81)

WHT

(25) RED

(76)

BLK

(98)

GRY

(42)

ORG

(89)

PRPL

(88)

PRPL

(58) PRPL

(56) WHT

(74)

WHT

(75)WHT

(52) BLU

(C)

(S)

(R)

RED

(46) BLK

(55) BLK

000014010_00

YEL

(50) BLU

(80)

WHT

(51) ORG

(26)

WHT

(57) GRY

(89A) PRPL

(75A)WHT

(45) BLU

(9) GRN

(8) WHT

(60)

BLK

(59)

ORG

BLK

F1 WHT F2 WHT

(53) RED

(44) ORG

000015430_04_indigoNXT_awr_hb_mii_en.indb 238000015430_04_indigoNXT_awr_hb_mii_en.indb 238 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 239

IT0500/IT1200 - 1ph Remote

Number Component

1 Air Pump Harvest Assist

3 Bin Switch

5 Compressor

7 Compressor Overload

8 Compressor Potential Relay

11 Compressor Run Capacitor

12 Compressor Start Capacitor

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

22 Touchscreen

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

44 HPR Solenoid

45 Solenoid Valve - Liquid Line

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 239000015430_04_indigoNXT_awr_hb_mii_en.indb 239 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

240 Part Number: 000015430 Rev 04 4/22

IF0600/IF0900/IT0900/IT1200  1PH AIR/WATER

Self Contained Air & Water-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99) WHT

(77) RED

(61) RED

(81)

WHT

(76) BLK

(98) GRY

(42)

ORG

(89A) PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(75)

WHT

(50) BLU

(C)

(S)(R)

(45)YEL

RED

(46) BLK

(55) BLK

000015067_02

YEL

(46) ORG

RED

(81) WHT

(51)

ORG

WHT

(57)

GRY

(89)

PRPL

(75A) WHT

(60) BLK

(9) GRN

(8) WHT

(80)

WHT

RED

WHT

(85)

BLK

(86)

BLK

21 21

000015430_04_indigoNXT_awr_hb_mii_en.indb 240000015430_04_indigoNXT_awr_hb_mii_en.indb 240 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 241

IF0600/IF0900/IT0900/IT1200 - 1ph Air/Water

Number Component

1 Air Pump Harvest Assist

1A Air Pump Harvest Assist (When used)

3 Bin Switch

5 Compressor

7 Compressor Overload

9 Compressor PTCR (Two Terminal)

9A Compressor PTCR (Three Terminal) When Used

11 Compressor Run Capacitor

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

21 Disconnect Switch - Marine Models Only

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand (When Used)

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 241000015430_04_indigoNXT_awr_hb_mii_en.indb 241 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

242 Part Number: 000015430 Rev 04 4/22

IF0600/IF0900/IT0900/IT1200  3PH AIR/WATER

Self Contained Air & Water-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99) WHT

(77) RED

(61) RED

(81)

WHT

(76) BLK

(98) GRY

(42)

ORG

(89A) PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(75)

WHT

RED

(81) WHT

WHT

(57)

GRY

(89)

PRPL

(75A) WHT

(60) BLK

(9) GRN

(8) WHT

(80)

WHT

RED

WHT

(86) BLK

(74) WHT

(T1)(T3) (T2)

(55) BLK

(51) ORG

(85) BLK

L1L2

T1T2

000015067_02

000015430_04_indigoNXT_awr_hb_mii_en.indb 242000015430_04_indigoNXT_awr_hb_mii_en.indb 242 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

Part Number: 000015430 Rev 04 4/22 243

IF0600/IF0900/IT0900/IT1200 - 3ph Air/Water

Number Component

1 Air Pump Harvest Assist

1A Air Pump Harvest Assist (When used)

3 Bin Switch

5 Compressor

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

21 Disconnect Switch - Marine Models Only

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand (When Used)

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 243000015430_04_indigoNXT_awr_hb_mii_en.indb 243 5/23/2022 2:35:33 PM5/23/2022 2:35:33 PM

244 Part Number: 000015430 Rev 04 4/22

IT1500/IT1900  1PH AIR/WATER

Self Contained Air & Water-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99) WHT

(77) RED

(61) RED

(81)

WHT

(76) BLK

(98) GRY

(42)

ORG

(89A) PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(75)

WHT

(50) BLU

(C)

(S)(R)

(45)YEL

(46) BLK

(55) BLK

000015919_01

YEL

(46) ORG

RED

(81) WHT

(51)

ORG

WHT

(57)

GRY

(89)

PRPL

(75A) WHT

(60) BLK

(9) GRN

(8) WHT

(80)

WHT

RED

WHT

BLK

(86)

BLK

RED

BLK

RED

(46) ORG

(45)YEL

(44) BLK

14a

000015430_04_indigoNXT_awr_hb_mii_en.indb 244000015430_04_indigoNXT_awr_hb_mii_en.indb 244 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 245

IT1500/IT1900 - 1ph Air/Water

Number Component

1 Air Pump Harvest Assist

1A Air Pump Harvest Assist

3 Bin Switch

5 Compressor

7 Compressor Overload

9 Compressor PTCR (Two Terminal) When Used

9A Compressor PTCR (Three Terminal) When Used

11 Compressor Run Capacitor

14 Condenser Fan Motor

14a EC Fan Motor When Used 12 VDC

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

21 Disconnect Switch - Marine Models Only

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 245000015430_04_indigoNXT_awr_hb_mii_en.indb 245 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

246 Part Number: 000015430 Rev 04 4/22

IT1500/IT1900  3 PH AIR/WATER

Self Contained Air & Water-cooled

GND

(22)

WHT

(21) BLU(20) BLU

(99) WHT

(77) RED

(61) RED

(81)

WHT

(76) BLK

(98) GRY

(42)

ORG

(89A) PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(75)

WHT

RED

(81) WHT

WHT

(57)

GRY

(89)

PRPL

(75A) WHT

(60) BLK

(9)

GRN

(8) WHT

(80)

WHT

RED

WHT

(86) BLK

(74) WHT

(T1)(T3)

(T2)

(55) BLK

(51) ORG

(85) BLK

L1L2

T1T2

000015919_01

14a

000015430_04_indigoNXT_awr_hb_mii_en.indb 246000015430_04_indigoNXT_awr_hb_mii_en.indb 246 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 247

IT1500/IT1900 - 3 PH Air/Water

Self Contained Air & Water-cooled

Number Component

1 Air Pump Harvest Assist

1A Air Pump Harvest Assist

3 Bin Switch

5 Compressor

14 Condenser Fan Motor

14a EC Fan Motor When Used 12 VDC

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

21 Disconnect Switch - Marine Models Only

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 247000015430_04_indigoNXT_awr_hb_mii_en.indb 247 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

248 Part Number: 000015430 Rev 04 4/22

IF0500/IF0600/IF0900/IT1200/IF1500  1PH REMOTE

Remote Condenser Air Cooled

GND

(22) WHT

(21) BLU(20) BLU

(99)

WHT

(77) RED

(61) RED

(82) WHT

(81)

WHT

(76) BLK

(98) GRY

(42)

ORG

(89) PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(74)

WHT

(75)

WHT

(50) BLU

(C)

(S)(R)

(45)YEL

RED

BLK

(55) BLK

000014013_00

YEL

(46) ORG

RED

(81) WHT

(51) ORG

WHT

(57)

GRY

(89A)

PRPL

(75A)WHT

(60) BLK

(9) GRN

(8) WHT

F2F1

(59) ORG

(83) ORG

(80)

WHT

RED

WHT

000015430_04_indigoNXT_awr_hb_mii_en.indb 248000015430_04_indigoNXT_awr_hb_mii_en.indb 248 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 249

IF0500/IF0600/IF0900/IT1200/IF1500 - 1ph Remote

Number Component

1 Air Pump Harvest Assist

3 Bin Switch

5 Compressor

9 Compressor PTCR (Two Terminal)

9A Compressor PTCR (Three Terminal) When Used

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

22 Touchscreen

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand

44 HPR Solenoid

45 Solenoid Valve - Liquid Line

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 249000015430_04_indigoNXT_awr_hb_mii_en.indb 249 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

250 Part Number: 000015430 Rev 04 4/22

IF0500/IF0600/IF0900/IT1200/IF1500  3PH REMOTE

CONDENSER

Remote Condenser Air Cooled

L1L2

GND

(22)

WHT

(21) BLU(20) BLU

(99) WHT

(77) RED

(61) RED

(87)

WHT

(81)

(25) RED

(76)

BLK

(98)

GRY

(42)

ORG

(89)

PRPL

(88)

PRPL

(58)

PRPL

(56) WHT

(74) WHT

(75)WHT

(T1)(T3) (T2)

(55) BLK

(51) ORG

000013976_02

(88)

RED

(80)

WHT

(26)

WHT

(57) GRY

(89A) PRPL

(75A)WHT

(9) GRN

(8) WHT

(51) ORG

(78)

RED

(22) WHT

(82)

WHT

(79)

WHT

(59)

ORG

(83)

ORG

000015430_04_indigoNXT_awr_hb_mii_en.indb 250000015430_04_indigoNXT_awr_hb_mii_en.indb 250 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 251

IF0500/IF0600/IF0900/IT1200/IF1500 - 3ph Remote

Number Component

1 Air Pump Harvest Assist

3 Bin Switch

5 Compressor

9PTCR

14 Condenser Fan Motor

15 Condenser Fan Motor Run Capacitor

17 Contactor Coil

18 Contactor Contacts

19 Control Board

22 Touchscreen

25 Fan Cycle Control

28 Fuse

31 High Pressure Cutout

32 Ice Thickness Probe

34 LED

41 See Control Board Schematic For Detail

42 Solenoid Valve - Harvest Left Hand

43 Solenoid Valve - Harvest Right Hand

44 HPR Solenoid

45 Solenoid Valve - Liquid Line

49 Thermistors

54 Transformer Control Board

55 Water Dump Valve

56 Water Inlet Valve

57 Water Level Probe

58 Water Pump

Wire Colors

BLK Black

BLU Blue

BRN Brown

GRY Grey

ORG Orange

PRPL Purple

RED Red

WHT White

YEL Yellow

Refer to control board schematic for control board detail

000015430_04_indigoNXT_awr_hb_mii_en.indb 251000015430_04_indigoNXT_awr_hb_mii_en.indb 251 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

252 Part Number: 000015430 Rev 04 4/22

Electronic Control Board

34-1

34-2

34-10

34-9

34-8

34-7

34-6

34-5

34-4

34-3

49-1

49-7

49-6

49-5

49-4

49-3

49-2

000015430_04_indigoNXT_awr_hb_mii_en.indb 252000015430_04_indigoNXT_awr_hb_mii_en.indb 252 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 253

Electronic Control Board Schematic

Number Description

2 iAuCs

3 Bin Switch

5 Compressor Contactor Coil Relay

22 Touchscreen

28 Fuse

31 High Pressure Cutout

33 Ice Thickness Probe

34 LED - Relays

34-1 LED - Display

34-2 LED - Micro

34-3 LED - Clean

34-4 LED - Harvest

34-5 LED - Ice Thickness Probe

34-6 LED - High Water Probe

34-7 LED - Low Water Probe

34-8 LED - Display Bypass Is Active

34-9 LED - Right Bin Switch

34-10 LED - Left Bin Switch

38 LuminIce®

42 Relay Solenoid Valve - Harvest Left Hand

43 Relay Solenoid Valve - Harvest Right Hand

49-1 Thermistor T1 Liquid Line Temperature

49-2 Thermistor T2 - Discharge Line Temperature

49-3 Thermistor T3 - Evaporator Inlet Temperature

Single Evaporator models - Evaporator Outlet

Temperature Dual Evaporator Models

49-4 Thermistor T4 - Evaporator Outlet Temperature

49-5 Thermistor T5 - Bin Level Probe

49-6 Thermistor T6 - Potable water Temperature

49-7 Thermistor T7 - Ambient Air Temperature

55 Relay Water Dump Valve

56 Relay Water Inlet Valve

57 Water Level Probe

58 Relay Water Pump

70 EC12 - 12 VDC Power EC Fan Motor

71 RS232 Communication Port

72 RS485 Communication Port

73 USB Connector

74 Reverse Osmosis/De-ionized Water Usage Jumper

75 Display Bypass Button

000015430_04_indigoNXT_awr_hb_mii_en.indb 253000015430_04_indigoNXT_awr_hb_mii_en.indb 253 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

254 Part Number: 000015430 Rev 04 4/22

ELECTRICAL NOISE FILTER

Filter is installed to the incoming line voltage power supply

on Korean models.

CONTROL BOX

FILTER

JUNCTION BOX

BLK

RED

BLK

RED

CONTROL

BOX

000015430_04_indigoNXT_awr_hb_mii_en.indb 254000015430_04_indigoNXT_awr_hb_mii_en.indb 254 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

Part Number: 000015430 Rev 04 4/22 255

Refrigeration Tubing Schematics

SELFCONTAINED AIR OR WATERCOOLED

IF0300/IT0420/IT0450/IT0500/IT0620/IT0750

Self-Contained Air or Water-Cooled





Number Component

1 Compressor

2 Condenser - Air or Water Cooled

3 Receiver - Water Cooled Only

4 Liquid Line Filter Drier

5 Heat Exchanger

6 TXV - Thermostatic Expansion Valve

7 Evaporator

8 Strainer

9 Harvest Solenoid Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 255000015430_04_indigoNXT_awr_hb_mii_en.indb 255 5/23/2022 2:35:34 PM5/23/2022 2:35:34 PM

256 Part Number: 000015430 Rev 04 4/22

IF0900/IT0900 Self-Contained Air or Water-Cooled

Number Component

1 Compressor

2 Condenser - Air or Water Cooled

3 Receiver - Water Cooled Only

4 Liquid Line Filter Drier

5 Heat Exchanger

6 TXV - Thermostatic Expansion Valve

7 Evaporator

8 Strainer

9 Harvest Solenoid Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 256000015430_04_indigoNXT_awr_hb_mii_en.indb 256 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

Part Number: 000015430 Rev 04 4/22 257

IT1200 Self-Contained Air or Water-Cooled

Number Component

1 Compressor

2 Condenser - Air or Water Cooled

3 Receiver - Water Cooled Only

4 Liquid Line Filter Drier

5 Heat Exchanger

6 TXV - Thermostatic Expansion Valve

7 Evaporator

8 Strainer

9 Harvest Solenoid Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 257000015430_04_indigoNXT_awr_hb_mii_en.indb 257 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

258 Part Number: 000015430 Rev 04 4/22

IT1500/IT1900 Air or Water-Cooled

Number Component

1 Compressor

2 Condenser - Air or Water Cooled

3 Receiver - Water Cooled Only

4 Liquid Line Filter Drier

5 Heat Exchanger

6 TXV - Thermostatic Expansion Valve

7 Evaporator

8 Strainer

9 Harvest Solenoid Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 258000015430_04_indigoNXT_awr_hb_mii_en.indb 258 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

Part Number: 000015430 Rev 04 4/22 259

REMOTE AIRCOOLED CONDENSER MODELS

IT0500/IF0600/IF0900 Remote Air-Cooled Condenser

Number Component

1 Compressor

2 Discharge Check Valve

3 Condenser - Remote Air-Cooled

4 Head Pressure Control Valve

5 Liquid Line Check Valve

6 Receiver

7 Liquid Line Filter Drier

8 Liquid Line Solenoid Valve

9 Heat Exchanger

10 TXV - Thermostatic Expansion Valve

11 Evaporator

12 Strainer

13 Harvest Solenoid Valve

15 Harvest Pressure Solenoid Valve

16 Harvest Pressure Regulating Valve



0



5

6

000015430_04_indigoNXT_awr_hb_mii_en.indb 259000015430_04_indigoNXT_awr_hb_mii_en.indb 259 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

260 Part Number: 000015430 Rev 04 4/22

IT1200 Remote Air Cooled Condenser

Number Component

1 Compressor

2 Discharge Check Valve

3 Condenser - Remote Air-Cooled

4 Head Pressure Control Valve

5 Liquid Line Check Valve

6 Receiver

7 Liquid Line Filter Drier

8 Liquid Line Solenoid Valve

9 Heat Exchanger

10 TXV - Thermostatic Expansion Valve

11 Evaporator

12 Strainer

13 Harvest Solenoid Valve

15 Harvest Pressure Solenoid Valve

16 Harvest Pressure Regulating Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 260000015430_04_indigoNXT_awr_hb_mii_en.indb 260 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

Part Number: 000015430 Rev 04 4/22 261

IT1500/IT1900 Remote Air Cooled Condenser

Number Component

1 Compressor

2 Discharge Check Valve

3 Condenser - Remote Air-Cooled

4 Head Pressure Control Valve

5 Liquid Line Check Valve

6 Receiver

7 Liquid Line Filter Drier

8 Liquid Line Solenoid Valve

9 Heat Exchanger

10 TXV - Thermostatic Expansion Valve

11 Evaporator

12 Strainer

13 Harvest Solenoid Valve

15 Harvest Pressure Solenoid Valve

16 Harvest Pressure Regulating Valve

000015430_04_indigoNXT_awr_hb_mii_en.indb 261000015430_04_indigoNXT_awr_hb_mii_en.indb 261 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

262 Part Number: 000015430 Rev 04 4/22

THIS PAGE INTENTIONALLY LEFT BLANK

000015430_04_indigoNXT_awr_hb_mii_en.indb 262000015430_04_indigoNXT_awr_hb_mii_en.indb 262 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

MANITOWOC ICE

2110 SOUTH 26TH STREET

MANITOWOC, WI 54220

8005445720

WWW.MANITOWOCICE.COM

Part Number: 000015430 Rev 04 4/22

000015430_04_indigoNXT_awr_hb_mii_en.indb 264000015430_04_indigoNXT_awr_hb_mii_en.indb 264 5/23/2022 2:35:35 PM5/23/2022 2:35:35 PM

Manitowoc IDT0450W/D400 Full Cube Ice Machine 430 lb Production and 365 lb Bin Capacity, Water Cooled, 115V IDT0450W\/D400

Product's Documents

Service Manual

Specifications

Manitowoc IDT0450W\/D400 Questions and Answers