Hoshizaki KM1301SAJE KM-1301SAJ-E 48" Stackable Ice Modular User Manual

Models

KM-1301SAJ-E

Modular Crescent Cuber

Service Manual

Number: 73233

Issued: 9-28-2018

hoshizakiamerica.com

WARNING

Only qualied service technicians should install and service the icemaker. To

obtain the name and phone number of your local Hoshizaki Certied Service

Representative, visit www.hoshizaki-europe.com. No service should be undertaken

until the technician has thoroughly read this Service Manual. Failure to service and

maintain the icemaker in accordance with this manual will adversely affect safety,

performance, component life, and warranty coverage and may result in costly water

damage. Proper installation is the responsibility of the installer. Product failure or

property damage due to improper installation is not covered under warranty.

Hoshizaki provides this manual primarily to assist qualied service technicians in the

service and maintenance of the icemaker. Should the reader have any questions or

concerns which have not been satisfactorily addressed, please call the appropriate

Hoshizaki Service Office:

UK/Ireland - Hoshizaki UK

TEL : +44 (0)845 456 0585

FAX: +44 (0)132 283 8331

Holland - Hoshizaki Europe

TEL : +31 (0)20 6918499

FAX: +31 (0)20 6918768

Belgium/Luxemburg - Hoshizaki Belgium

TEL : +32 (0)2 7123030

FAX: +32 (0)2 7123031

Germany/Switzerland/Austria - Hoshizaki Deutschland

TEL : +49 (0)2154 92810

FAX: +49 (0)2154 928128

France - Hoshizaki France

TEL : +33 (0)1 48639380

FAX: +33 (0)1 48639388

Other countries - Hoshizaki Europe

TEL: +31 (0)20 6918499

FAX: +31 (0)20 6918768

Web Site: www.hoshizaki-europe.com

NOTE: To expedite assistance, all correspondence/communication MUST include the

following information:

• Model Number ________________________

• Serial Number ________________________

• Complete and detailed explanation of the problem.

CONTENTS

Important Safety Information ................................................................................................. 5

I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 7

A. KM Construction............................................................................................................ 7

B. Bin Control .................................................................................................................... 8

1. Single Bin Control .................................................................................................... 8

2. Stacked Bin Control ................................................................................................. 8

C. Water/Refrigeration Circuit Diagram .............................................................................. 9

II. Sequence of Operation and Service Diagnosis ............................................................... 10

A. Sequence of Operation Flow Chart ............................................................................. 10

1. Operation Flow Chart ............................................................................................ 10

2. Shutdown Flow Chart .............................................................................................11

B. Service Diagnosis ....................................................................................................... 12

C. Control Board Check ................................................................................................... 18

D. Bin Control Check ....................................................................................................... 19

1. Bin Control Check .................................................................................................. 19

2. Bin Control Cleaning .............................................................................................. 20

E. Float Switch Check and Cleaning ............................................................................... 21

1. Float Switch Check ................................................................................................ 21

2. Float Switch Cleaning ............................................................................................ 22

F. Thermistor Check ......................................................................................................... 23

G. Control Switch ............................................................................................................. 23

H. Diagnostic Tables ........................................................................................................ 24

I. Freeze-Up Check List ................................................................................................... 28

III. Controls and Adjustments ............................................................................................... 29

A. Control Board Layout .................................................................................................. 30

B. LED Lights and Audible Alarm Safeties ....................................................................... 31

C. Settings and Adjustments ............................................................................................ 32

1. Default Dip Switch Settings .................................................................................... 32

2. Harvest Time (S4 dip switch 1 & 2)........................................................................ 33

3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4) ................. 33

4. Pump-Out Frequency Control (S4 dip switch 5) ..................................................... 34

5. Harvest Pump Time (Harvest Assist) (S4 dip switch 6) ......................................... 34

6. Harvest Pump Time (Harvest Assist) (S4 dip switch 7) ......................................... 35

7. Factory Use (S4 dip switch 8)................................................................................. 35

8. Freeze Timer (S4 dip switch 9 & 10) ...................................................................... 36

9. Float Switch Control Selector (S5 dip switch 1) ..................................................... 36

10. Rell Counter (S5 dip switch 2 and 3) .................................................................. 37

IMPORTANT

This manual should be read carefully before the appliance is serviced. Read

the warnings and guidelines contained in this manual carefully as they provide

essential information for the continued safe use, service, and maintenance of the

appliance. Retain this manual for any further reference that may be necessary.

IV. Refrigeration Circuit and Component Service Information.............................................. 38

A. Refrigeration Circuit Service Information .................................................................... 38

B. Component Service Information .................................................................................. 41

V. Maintenance .................................................................................................................... 42

VI. Preparing the Icemaker for Periods of Non-Use ............................................................. 43

VII. Disposal ......................................................................................................................... 44

VIII. Technical Information .................................................................................................... 45

A. Specication and Performance Data ........................................................................... 45

B. Wiring Diagram ............................................................................................................ 46

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could

result in death, serious injury, damage to the appliance, or damage to property.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

NOTICE Indicates a situation which could result in damage to the

appliance or property.

IMPORTANT Indicates important information about the use and care of the

appliance.

WARNING

The appliance should be destined only to the use for which it has been expressly

conceived. Any other use should be considered improper and therefore dangerous.

The manufacturer cannot be held responsible for injury or damage resulting from

improper, incorrect, and unreasonable use. Failure to service and maintain the

appliance in accordance with this manual will adversely affect safety, performance,

component life, and warranty coverage and may result in costly water damage.

To reduce the risk of death, electric shock, serious injury, or re, follow basic

precautions including the following:

• Only qualied service technicians should install and service this appliance.

• The appliance must be installed in accordance with applicable national, state, and

local codes and regulations. Failure to meet these code requirements could result in

death, electric shock, serious injury, re, or damage to the appliance.

• Electrical connection must be hard-wired and must meet national, state, and local

electrical code requirements. Failure to meet these code requirements could result

in death, electric shock, serious injury, re, or damage.

• The icemaker requires an independent power supply of proper capacity. See the

nameplate for electrical specications. Failure to use an independent power supply

of proper capacity can result in a tripped breaker, blown fuse, damage to existing

wiring, or component failure. This could lead to heat generation or re.

• THE ICEMAKER MUST BE EARTHED (GROUNDED). 220-240VAC UK and the

Republic of Ireland: Failure to properly ground the icemaker could result in death

or serious injury.

• To reduce the risk of electric shock, do not touch the control switch with damp

hands.

• Move the control switch to the "OFF" position and turn off the power supply before

servicing. Lockout/Tagout to prevent the power supply from being turned back on

inadvertently.

• Do not make any alterations to the appliance. Alterations could result in electric

shock, serious injury, re, or damage.

WARNING, continued

• The 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 or instruction concerning use of the

appliance by a person responsible for their safety.

• Children should be properly supervised around the appliance.

• Do not climb, stand, or hang on the appliance or allow children or animals to do so.

Serious injury could occur or the appliance could be damaged.

• Do not use combustible spray or place volatile or ammable substances near the

appliance. They might catch re.

• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance

could cause harm to individuals or damage to the appliance.

NOTICE

• Follow the instructions in this manual carefully to reduce the risk of costly water

damage.

• In areas where water damage is a concern, install in a contained area with a oor

drain.

• Install the appliance in a location that stays above freezing. Normal operating

ambient temperature must be within 45°F to 100°F (7°C to 38°C).

• Do not leave the appliance on during extended periods of non-use, extended

absences, or in sub-freezing temperatures. To properly prepare the appliance for

these occasions, follow the instructions in "VI. Preparing the Icemaker for Periods of

Non-Use."

• Do not place objects on top of the appliance.

• The dispenser unit/ice storage bin is for ice use only. Do not store anything else in

the dispenser unit/ice storage bin.

I. Construction and Water/Refrigeration Circuit Diagram

A. KM Construction

1. Air-Cooled Model

Evaporator Assembly

Spray Tubes

Inlet Water Valve

Water Supply Inlet

Hot Gas Valve

Junction Box

Condenser

Check Valves

(refrigeration)

Control Box

Drier

Control Switch

Compressor

Cleaning Valve

Float Switch

Water Pump

Check Valve

(water)

Thermostatic Expansion Valves

Liquid Line Valve

Fan Motor

Fan Blade

Low-Side Service Valve

High-Side Service Valve

High-Pressure

Switch

Transformer Box

Upper Unit Wire Harness

Connector B (not used)

Bin Control

Cable

Bracket

Control Board

Red K4 Connector

Upper Unit Wire Harness

Wire Saddle

Lower Unit Wire Harness Connector B to

Upper Unit Wire Harness Connector A

Lower

Unit Wire

Harness

Control Board

Red K4 Connector

Upper Unit Connection Overview

Upper Unit Connection Detail

Control Board

Red K4 Connector

Lower Unit Wire Harness

Connector B

Upper Unit

Wire Harness

Connector A

Upper Unit Wire Harness

Connector B (not used)

Wire Harness

Connector A

Bin Control

Cable Connector

Connection Detail

Control Board

Red K4 Connector

Bin Control Assembly

Thumbscrews

Bin Control Bracket

Bin Control

Cable Bracket

Control Board

Red K4 Connector

Wire Harness

Wire Saddle

Bin Control Cable

Bin Control Cable Connector to

Wire Harness Connector A

Wire Harness

Connector B

(for upper unit)

Mechanical Bin Control Connection Overview

Wire Harness

Connector B

(for upper unit)

B. Bin Control

1. Single Bin Control

2. Stacked Bin Control

C. Water/Refrigeration Circuit Diagram

1. Air-Cooled Model

Water Supply

Cleaning Valve

Float Switch

Drain

Check Valve

Thermostatic Expansion Valves

Compressor

Hot Gas

Valve

Check

Valves

High-Pressure

Switch

Strainer

Drier

Condenser

Evaporator

Service

Valve

Discharge Line

Suction Line

Water Pump

Thermistor

Spray Tubes

Inlet Water Valve

Pump-Out

Water

Tank

Service

Valve

Refrigeration Circuit

Water Circuit

Liquid Line

Valve

Spray Tubes

Fan

Heat Exchanger

Freeze/Harvest

Pump Timer

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Chart

1. Operation Flow Chart

FS check

1 to 3-min. harvest timer in

control (S4 dip switch 1 & 2)

Legend:

BC–bin control

CB–control board

Comp–compressor

FM–fan motor

FS–oat switch

HGV–hot gas valve

HPT–harvest pump time

LLV –liquid line valve

PM–pump motor

WV–inlet water valve

Components Energized when the Control Switch is in the "WASH" Position

The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position, power is supplied

to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the evaporator plate assembly. With the

cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside of the evaporator plate assembly.

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not restart when the control

switch is placed in the "ICE" position.

Operation Flow Chart

1. 1-Minute

Fill Cycle

Cycle

Steps

2. Harvest Cycle

• WV time: 6 min. or the length of harvest minus HPT

setting (S4 dip switch 6), whichever is shorter.

• Max. harvest time: 20 min.

Thermistor

in control

3. Freeze Cycle

• Min. freeze time: 5 min.

• Max. freeze time: freeze timer setting (S4

dip switch 9 & 10).

FS in control

4. Pump-Out Cycle

• Factory set for every 10th

cycle

(S4 dip switch 5)

• Pump motor stops for

2 sec., then reverses for

10/20 sec.

(S4 dip switch 3 & 4)

WV energized

FS open

Comp energized

HGV energized

WV energized

Thermistor temperature reaches

48°F (9°C) (3.9 kΩ or less). Harvest

timer starts.

FS open

Comp energized

FM energized

PM energized

LLV energized

HGV de-energized

FS closed

Comp energized

HGV energized

PM de-energizes for 2 sec.,

then reverses for 10/20 sec.

FM de-energized

LLV de-energized

FS check

Startup

If FS is open, Comp stops and cycle

returns to 1-Min. ll.

5-min.

minimum

freeze timer in

control

FS closed

FS opens or freeze

timer terminates

50 sec.

PM energized

WV de-energized

Harvest Pump

Time

Slush Control

Thermistor temperature

reaches 36°F (2.2°C)

(5.8 kΩ).

PM de-energized for

10 sec.

Shutdown Flow Chart

1. Bin Full

Shutdown Delay:

• Fill Cycle–15 sec. after activation.

• Harvest Cycle–At the end of the harvest cycle, or up

to 15 sec. into the freeze cycle if

activated at the end of the harvest cycle.

• Freeze Cycle– 15 sec. after activation if activated at least

15 sec. before the 5-min. short cycle

protection timer terminates.

Otherwise, at the end of the next harvest

cycle.

Shutdown

and Restart

BC Operation

BC open (BC actuator paddle engaged)

Green "BC CLOSED" LED off

Yellow "BC OPEN" LED on

Yellow "BC OPEN" LED continues. All

components de-energized.

2. Icemaker Off

All components

de-energized.

3. Ice Level Lowered

Icemaker starts at

"1. 1-Minute Fill Cycle."

BC closed

(BC actuator paddle disengaged)

Green "BC CLOSED" LED on

Yellow "BC OPEN" LED off

To 1. 1-Minute Fill Cycle

Legend:

BC–bin control

2. Shutdown Flow Chart

B. Service Diagnosis

WARNING

• The appliance should be diagnosed and repaired only by qualied service

personnel to reduce the risk of death, electric shock, serious injury, or re.

• Risk of electric shock. Control switch in "OFF" position does not de-energize all

loads Use extreme caution and exercise safe electrical practices.

• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

• Before servicing the appliance, move the control switch to the "OFF" position and

turn off the power supply.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after the appliance is serviced. Make sure that none have fallen

into the dispenser unit/ice storage bin.

• Make sure all food zones in the appliance and dispenser unit/ice storage bin are

clean after service.

The diagnostic procedure is a sequence check that allows you to diagnose the electrical

system and components. Before proceeding, check for correct installation, proper voltage

per nameplate, and adequate water supply. Check CB using the steps in "II.C. Control

Board Check." Check dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, 10 and

S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are

cleaning adjustments and the settings are exible. For factory default settings, see "III.C.1.

Default Dip Switch Settings."

Note: • When checking high voltage (115VAC), always choose a white (W) neutral wire to

establish a good neutral connection.

• The 115VAC neutral (W) is provided through the MT. To conrm a good neutral,

check for 60VAC from white (W) neutral to ground (GND). If 60VAC is present,

neutral is good. If 60VAC is not present, check 230VAC main power supply to

MT. If 230VAC is present, check MT continuity.

• When checking voltage from the CB K1 connector (10 pin connector), pull CB

K1connector out slightly to allow room for multimeter test leads contact.

1) Turn off the power supply, then access the control box. Move the control switch to the

"OFF" position. Clear any ice from BC.

2) Check that BC is closed and the 115VAC 10A fuse is good.

1. Operation Diagnosis

3) Power On: Turn on the power supply, then move the control switch to the "ICE" position.

A 5-sec. delay occurs. CB red "POWER OK" LED and green "BC CLOSED" LED turn

on. If yellow "BC OPEN" LED is on (indicating a full bin), check BC. Move ice away from

BC actuator paddle. If yellow "BC OPEN" LED stays on, see "II.D. Bin Control Check.".

Note: • CB red "POWER OK" LED remains on unless the 10.5VAC power supply is

interrupted (K2 connector).

• Check CB using the steps in "II.C.Control Board Check."

• Conrm CB green "BC CLOSED" LED is on. If CB yellow "BC OPEN" LED is on,

remove ice from BC. If no ice is around BC and yellow "BC OPEN" LED is on,

see "II.D. Bin Control Check."

a) Power On Diagnosis: If CB red "POWER OK" LED is off, conrm 10A fuse is good.

Check for 115VAC at control switch #1 (LBU) to neutral (W) then at control switch

#2(P) to neutral (W). If 115VAC is present on #1 (LBU) and not on #2(P), replace

control switch. If 115VAC is present on control switch #2 (P), check for 115VAC at

HPS (P) to neutral (W) then HPS (BK) to neutral (W). If115VAC is present at HPS

(P) and not at HPS (BK), HPS is open. See HPS Diagnosis below. If115VAC is

present at HPS (BK), check for 10.5VAC at CB K2#1 red wire to CB K2 #2 red wire.

If10.5VAC is not present, check that the cleaning valve interlock switch is closed.

Next, check CT continuity. If open, replace CT.

b) HPS Diagnosis: Conrm condenser coil is not clogged or restricted. Let refrigeration

circuit pressures equalize. If HPS does not reset and pressures are equalized,

replace HPS. Ifpressures are not equalized, reclaim refrigerant and diagnose

refrigeration circuit restriction. Check that there are no restrictions in the refrigeration

circuit.

Harvest Cycle: HGV, strainer, or check valve.

Freeze Cycle: FM, TXV, LLV, strainer, check valve, drier, and fan blade for binding.

Conrm that the location meets installation requirements. See the appliance's

instruction manual for details.

4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for

a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp,

HGV, FMR energized), continue to step 5a. If FS is open, WV remains energized until

FS closes (low water safety protection during initial start up and at the end of each

harvest). Diagnosis: Check that water enters the water tank. If not, check that the water

supply line shut-off valve is open and screens or external lters are clear. Check for

115VAC at CB K1 #6 (O) to neutral (W). If 115VAC is not present, replace CB. If 115VAC

is present, and WV does not energize, check for 115VAC at WV. If 115VAC is present,

check coil continuity. Ifopen, replace WV. If the water tank lls, but the appliance fails to

start harvest (Comp energized), check for open FS. See "II.E. Float Switch Check and

Cleaning." If FS is closed and CB fails to start the harvest cycle after 1 min., replace CB.

5a) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay continue. Comp,

FMR, HGV, and X10 relay energize. CBmonitors the warming of the evaporator via

the thermistor located on the suction line. When the thermistor reaches 48°F (9°C),

CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest

timer (S4 dip switch 1 & 2 and S5dip switch 4). WV and X11 relay are energized during

harvest for a maximum of 6 min. or the length of harvest minus HPT setting (S4 dip

switch 6), whichever is shorter. See step 5b below.

a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm that Comp

energizes. If not, check for 115VAC at CB K1 #1 (V) or #9 (V) to neutral (W).

If115VAC is not present, check for 115VAC at CB K1 #7 (LBU) or #10 (LBU) to

neutral (W). If115VAC is present at #7 (LBU) or #10 (LBU) and not at #1 (V) or

#9(V), replace CB. If 115VAC is present, check for 115VAC at CR solenoid. If 115VAC

is present, conrm contacts are closed. If not, replace CR. If CR contacts are closed,

check Comp start and run capacitors, Comp start relay, and Comp motor winding.

b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that

HGV energizes and opens. Check for 115VAC at CB K1 #2 (P) to neutral (W).

If115VAC is not present and LED 2 is on, replace CB. If 115VAC is present, check for

115VAC at HGV coil and check HGV coil continuity. Replace as needed.

c) LLV Diagnosis: Conrm that LLV is de-energized and closed (not bypassing).

Ifenergized, replace CB. If de-energized and bypassing, replace LLV.

5b) Harvest Pump Time (Harvest Assist) – LEDs 1, 3, and 2 are on. When the thermistor

reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination

over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch4).

WhenWV de-energizes, LED 4 turns off, X11 relay de-energizes and LED 3turns on.

PM energizes. Comp, HGV, and X10relay continue.

Diagnosis: Place a thermometer on the suction line next to the thermistor. Has it

warmed to 48°F (9°C) or warmer? Conrm thermistor status. See "II.F. Thermistor

Check." If the thermistor reading is in proper range, dip switch 7 is on, and PM does

not energize before harvest terminates, replace CB. If WV continues, check for 115VAC

at CB K1 #6 (O). If115VAC is present, and LED 4 is off, replace CB. If LED 3is on and

PM is not energized, check for 115VAC at CB K1 #5(DBU). If115VAC is not present,

replace CB. If 115VAC is present and PM is not energized, check for 115VAC at X10relay

terminal #7 (Y) to neutral (W). If 115VAC is not present, check for 115VAC at X10 relay

terminal #3 (P) to neutral (W) and X10 relay terminal #5 (Y) to neutral (W). If 115VAC is

present on terminal #3(P) and not on terminal #5 (Y), replace X10 relay. If 115VAC is

present on X10 relay terminal #7 (Y) and PM is not energized, check for 115VAC at X10

relay terminal #4 (R) to neutral (W) and terminal #6 (DBU) to neutral (W). If 115VAC is

present on terminal #6(DBU) and not on terminal #4 (R), replace X10relay. If 115VAC

is present on X10relay terminal #4 (R), check control switch contact continuity between

terminals #4(R) and #5(R). Ifcontacts are open, replace control switch. If contacts are

closed and 115VAC is present between control switch terminal #5(R) and neutral (W),

check PM capacitor and motor winding continuity.

5c) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F

(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to

the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). Check discharge line

temperature. For a thermistor check, see "II.F.Thermistor Check." If 1-min. ll cycle

starts after harvest timer terminates, check that FS is clean and operating properly, see

"II.E. Float Switch Check and Cleaning." If FS is closed, CB proceeds to the next cycle.

Ifnot, replace CB.

Note: The minimum total time allowed by CB for a complete harvest cycle is based on

S5 dip switch 4. Maximum harvest time allowed is 20min.

NOTICE! S4 dip switch 7 must remain on. Otherwise, PM will not energize during

the last seconds of harvest.

6) Freeze Cycle – LED 1 is on. Comp and PM continue. FM and LLV energize. HGV and

X10 relay de-energize. Appliance is held in freeze by a 5-min. short cycle protection

timer. After 5-min. short cycle protection timer terminates and FS opens, freeze cycle

terminates.

Note: PM power supply switches from CBK1 #5(DBU) in harvest to K1 #4 (R) in freeze.

Slush Control: When slush control is enabled (S5 dip switch 5 "ON"), PM de-energizes

when thermistor reaches 36°F (2.2°C) (5.8kΩ) for 10 sec. then, energizes for the

remainder of the freeze cycle.

a) Freeze Cycle Diagnosis: Conrm Comp and PM continue. Conrm that FM and LLV

energize. Conrm HGV and X10 relay de-energize. During the rst 5 min. of freeze,

conrm evaporator is cooling. If not, conrm WV de-energized (not leaking by),

HGV de-energized (not bypassing), LLV and FM energize, TXV operates correctly,

Comp is efficient, and refrigerant charge is correct. See "VIII.A. Specication and

Performance Data."

b) Comp Diagnosis: If Comp de-energizes once freeze begins, check that appliance

has not shut off on HPS ("POWER OK" LED off). If so, check "3)b) HPS Diagnosis"

above. If"POWER OK" LED is on, check for 115VAC at CB K1 #1 (V) or #9 (V) to

neutral (W). If 115VAC is not present and LED 1 is on, replace CB.

Comp: If 115VAC is present, check for 115VAC at CR coil. If 115VAC is present,

check CR coil and contact continuity. Replace as needed. If CR is okay, check Comp

start relay and start and run capacitors. Next, check Comp motor winding continuity.

If Comp is energized but evaporator is not cooling, check for an inefficient Comp.

See "VIII.A. Specication and Performance Data.

c) WV and HGV Diagnosis: If WV is energized, check for 115VAC at CB K1 #6 (O) to

neutral (W). If 115VAC is present after PM energizes in harvest cycle, replace CB.

If115VAC is not present, replace WV (bypassing). If HGV did not close at the end of

harvest, check for 115VAC at CB K1 #2 (P) to neutral (W). If 115VAC is present and

LED 3 is off, replace CB. If 115VAC is not present, replace HGV (bypassing).

d) PM Diagnosis: Conrm water is owing over evaporator from PM and not WV. If PM

de-energizes once freeze begins, check for 115VAC at CB K1 #4 (R) to neutral (W).

If 115VAC is not present, replace CB. If 115VAC is present and PM is de-energized,

check for 115VAC at control switch #5 (R) to neutral (W). If 115VAC is present at CB

K1 #4 (R) and not at control switch #5 (R), check control switch continuity between

#5 (R) and #4 (R). Replace as needed. If 115VAC is present at control switch #5 (R)

to neutral (W), check PM capacitor and motor winding continuity.

e) FM and LLV Diagnosis: If FM or LLV does not energize, check for 115VAC at CB

K1#3 (BK) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present:

For FM, check capacitor, motor winding, and blade for binding.

For LLV, check coil voltage and continuity.

f) Refrigerant Pressures and TXV Diagnosis: If evaporator is still not cooling, check

refrigerant pressures. See "VIII.A. Specication and Performance Data."

Next, check TXV for proper operation. Remove TXV bulb and hold it in your hand,

refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant

low-side pressure should drop. A 10 to 15 pound pressure swing between warm and

cold conditions indicate a good TXV. If a 10 to 15 pound swing is not present, replace

TXV.

g) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS

connector. 15 sec. later appliance should switch out of the freeze cycle (15 second

delay after FS opens before terminating the freeze cycle). If appliance remains in

freeze longer than 15 sec. after FS removed, replace CB. If appliance switches with

FS removed but would previously not switch out of freeze with FS connected (long

freeze - 3 beep alarm), see "II.E. Float Switch Check and Cleaning."

Note: Normal freeze cycle will last 20 to 40 min. depending on model and conditions.

Cycle times and pressures should follow performance data provided in this

manual. See "VIII.A. Specication and Performance Data."

h) Short Freeze Cycle Diagnosis: Conrm water tank lls and overows during ll and

harvest cycles. If not, check water supply lters, shut-off valve, WV screen. Ifwater

tank empties before 5 min. timer terminates and freeze cycle is short, check that CV

is not leaking by (water owing down the potable drain). If CV is leaking by, remove

and clean CV, replace rubber seat and spring if necessary. If water tank is full, see

"II.E. Float Switch Check and Cleaning." for erratic FS.

7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the

rst pump-out is determined by S4 dip switch 5. See the table below.

Control Board Settings

S4 Dip Switch Setting

Pump-Out

Frequency

1st Pump-Out

No. 5

OFF Every 10 cycles After 11th freeze cycle

ON Every cycle After 2nd freeze cycle

Comp continues, HGV energizes. If S4dip switch 3 & 4 are set to 3 off and 4 on,

LED 4 turns on and WV and X11 relay energize, energizing X10relay. NOTICE!S4dip

switch 3 & 4 must not be set to 3 off and 4 on. Otherwise, PM will rotate in freeze

cycle direction instead of pump-out direction. FM and LLVde-energize. PM stops

for 2 sec., then reverses for 10/20 sec. depending on pump-out timer (S4dip switch 3

& 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-

out frequency control (S4 dip switch 5) is factory set, and generally no adjustment is

required. However, the pump-out frequency control can be set to have a pump-out occur

every 10 cycles or every cycle. For details, see "III.C.4. Pump-Out Frequency Control

(S4 dip switch 5)."

Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), after

5min. of freeze disconnect CB black K5 connector (FS connector). Check that PM

stops and re-starts. Next, check that PM rotation is correct (water owing down the

drain through CV). If PM does not stop and re-start, check that CB LEDs 1, 3, and

2are on. If not, replace CB. IfLEDs1,3, and 2 are on and PM does not energize,

check for 115VAC at CB K1 #5 (DBU) to neutral (W). If 115VAC is not present, replace

CB. If115VAC is present, check that X10 relay is de-energized. If not, check X11 relay

status. If X11 relay is energized, replace CB. If X11 relay is de-energized and X10 relay

is energized, replace X11 relay (contacts sticking). If X10 relay is de-energized, check

for 115VAC at terminal #6 (DBU) to neutral (W) and terminal #2 (DBU) to neutral (W).

If 115VAC is present on terminal #6 (DBU) and not on terminal #2 (DBU), replace

X10relay. If PM is energized and rotating in pump-out rotation, make sure the drain line

is not clogged and that CV is clean and operating properly.

Conrm FM and LLV de-energize. If FM is energized, conrm where FM is connected

on CB. If connected to CB K1 connector pin #9, FM should be energized. If connected

to CB K1 connector pin #3 and FM is energized, replace CB. If LLV is energized with

LEDs 1, 3, and 2 on, replace CB.

8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above.

Note: Appliance continues to cycle until BC is satised, power is switched off or

freeze-time correction cycle is initiated. The appliance always restarts at the

1-min. ll cycle.

2. Shutdown Diagnosis

1) See "II.D. Bin Control Check."

Legend: BC–bin control; CB–control board; Comp–compressor; CR–compressor relay;

CT–control transformer; CV–check valve; FM–fan motor; FS–oat switch;

HGV–hot gas valve; HPS–high-pressure switch; L LV–liquid line valve;

PM–pump motor; TXV–thermostatic expansion valve; WV–inlet water valve

C. Control Board Check

Before replacing CB that does not show a visible defect and that you suspect is bad,

always conduct the following check procedure. This procedure will help you verify your

diagnosis.

Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB

while CB is beeping. WARNING!Risk of electric shock. Care should be

taken not to touch live terminals. Once reset, the icemaker starts at the

1-minute ll cycle. For audible alarm information, see "III.B. LED Lights and

Audible Alarm Safeties."

1) Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, 10 and S5 dip

switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5 are cleaning

adjustments and the settings are exible. For factory default settings, see "III.C.1.

Default Dip Switch Settings."

2) Move the control switch to the "ICE" position. If the red "POWER OK" LED is on, control

voltage is good, continue to step 3. If the "POWER OK" LED is off, check CT secondary

circuit. CT output is 10.5VAC at 115VAC primary input. If the secondary circuit has

proper voltage and the red LED is off, replace CB.

If the secondary circuit does not have proper voltage, check CT primary circuit. Check

for 115VAC at CB K1 connector pin #10 (LBU) to neutral (W) for 115VAC. Always choose

a white (W) neutral wire to establish a good neutral connection when checking voltages.

For additional checks, see "II.H.1. No Ice Production."

3) The "OUTPUT TEST" button provides a relay sequence test. Make sure the control

switch is in the "ICE" position, then press the "OUTPUT TEST" button. For the correct

lighting sequence, see the table below. Note that the order of the LEDs from the outer

edge of the control board is 1, 4, 3, 2. Components (e.g., compressor) cycle during the

test.

Following the test, the icemaker begins operation at the 1-minute ll cycle. If the LEDs

do not light as described above, replace CB.

4) To verify voltage output from CB to the components, slide the CB K1 connector out far

enough to allow multimeter lead contact. With the icemaker in the cycle to be tested,

check output voltage from the corresponding pin on CB K1 connector to a neutral

(Wwire). If output voltage is not found and the appropriate LED is on, replace CB.

5) Conrm BC communication and shutdown sequence: Move the control switch to the

"ICE" position. Once the ll cycle starts press and hold the BC actuator paddle. CB

shuts down the appliance after 15 sec. If not, conrm BC status. See "II.D. Bin Control

Check." If BC checks ok, replace CB.

Legend: CB–control board; CT–control transformer

Wire Harness

Connector A

Bin Control

Cable Connector

Connection Detail

Control Board

Red K4 Connector

Wire Harness

Connector B

(for upper unit)

Fig. 1

D. Bin Control Check

1. Bin Control Check

This appliance uses a lever-actuated proximity switch to control the ice level in the

storage bin. No adjustment is required.

To check BC, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the control box cover, then clear any ice away from

BC.

4) Check BC wire harness connections. See Fig. 1.

5) Disconnect BC connector from CB K4 connector.

6) Check for continuity across the wires of

BC connector. When the actuator paddle is

not engaged, BC switch is closed. If open,

check that the wire harness connector is

properly connected and that the actuator

paddle is not sticking. Clean if necessary.

See "II.D. Bin Control Cleaning." If BC

switch still reads open, replace BC.

7) Press and hold the actuator paddle; check for continuity across the wires of BC

connector. When the actuator paddle is engaged, BC switch is open. If closed, check

that the actuator paddle is not restricted. Clean if necessary. See "II.D. Bin Control

Cleaning." If BC switch still reads closed, replace BC.

8) Reconnect BC connector to CB K4 connector, then move the control switch to the "ICE"

position. Turn on the power supply.

9) Check that CB green "BC CLOSED" LED is on.

10) Allow the icemaker to cycle on. Press and hold the actuator paddle. CB yellow

"BCOPEN" LED should turn on and the icemaker should shut down according to the

chart below. If it does not, replace CB.

Cycle at

Mechanical Bin

Control Activation

Shutdown

Fill Cycle 15 sec. after activation.

Harvest Cycle At the end of the harvest cycle, or up to 15 sec. into the freeze cycle if activated at the

end of the harvest cycle.

Freeze Cycle 15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle

protection timer terminates. Otherwise, at the end of the next harvest cycle.

Legend: BC–bin control; CB–control board

2. Bin Control Cleaning

Scale may build up on BC. Scale can cause the actuator paddle and magnet to stick. In

this case, BC should be cleaned.

WARNING

CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after the icemaker is serviced. Make sure that none have fallen

into the dispense unit/ice storage bin.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Clear any ice away from BC.

4) Disconnect BC connector from CB K4 connector, then remove BC from the icemaker.

5) Remove the actuator paddle from the switch mount. See Fig. 2.

6) Wipe down BC with a mixture of 1 part of Hoshizaki "Scale Away" and 25 parts of warm

water. Rinse the parts thoroughly with clean water.

7) Reassemble BC and replace it in its correct position.

Note: If the magnet was removed for cleaning, be sure to replace it in its correct

position.

8) Reconnect BC connector to CB K4 connector, then move the control switch to the "ICE"

position.

9) Replace the control box cover in its correct position.

10) Turn on the power supply to start the automatic icemaking process.

11) Replace the front panel in its correct position.

Legend: BC–bin control

BC Bracket

Magnet

Actuator

Paddle

Switch Mount

Fig. 2

Bin Control Proximity

Switch Closed

(calling for ice)

Bin Control

Proximity Switch

Open (bin full,

icemaker off or

shutting down)

BC Connector

E. Float Switch Check and Cleaning

FS is used to determine that there is sufficient water in the water tank after the 1-min.

ll cycle and after each harvest cycle. FS is also used to determine that the appropriate

volume of water has been converted into ice before switching out of the freeze cycle. No

adjustment is required.

1. Float Switch Check

To check FS, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the insulation panel, then remove the drain plug located on the lower front part

of the ice chute. See Fig. 3. Allow the water tank to drain.

4) Replace the drain plug in its correct position. Be careful not to cross thread it.

5) Remove the control box cover.

6) Disconnect FS connector from CB

K5connector.

7) Check for continuity across FS leads. With

the water tank empty, FS should be open.

If open, continue to step 8. If closed, follow

the steps in "II.E.2. Float Switch Cleaning."

After cleaning FS, check it again. Replace if

necessary.

8) Reconnect FS connector to CB K5

connector, then replace the control box

cover in its correct position.

9) Move the control switch to the "ICE" position. Replace the insulation panel and front

panel in their correct positions, then turn on the power supply. After 1 min., the 1-min.

ll cycle should end and the initial harvest cycle should begin. If the initial harvest cycle

begins, FS is good and the check is complete. If the initial harvest cycle does not begin,

continue to step 10.

10) Turn off the power supply.

11) Remove the front panel. Move the control switch to the "OFF" position.

12) Remove the control box cover.

13) Disconnect FS connector from CB K5 connector.

14) Check for continuity across FS leads. With the water tank full, FS should be closed.

IfFS is closed and the icemaker will not switch from the 1-min. ll cycle to the initial

harvest cycle, replace CB.

If FS is open, conrm that the water tank is full. If the water tank is not full, check the

water supply, water lters, and inlet water valve. If the water tank is full, follow the

steps in "II.E.2. Float Switch Cleaning." After cleaning FS, check it again. Replace if

necessary.

Legend: CB–control board; FS–oat switch

Fig. 3

Drain Plug

Ice Chute

Float Switch Assembly

Cleaning Valve

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on FS. Scale on the switch can

cause the oat to stick. In this case, FS should be cleaned.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the insulation panel, then remove the drain plug located on the lower front part

of the ice chute. See Fig. 3. Allow the water tank to drain.

4) Replace the drain plug in its correct position. Be careful not to cross thread it.

5) Disconnect the vent tube and the ush tube from the top of FS, then remove FS

assembly and remove the rubber boot from the bottom of FS assembly. See Fig. 4.

6) Remove the retainer rod from the bottom of FS housing, then remove the oat.

Becareful not to bend the retainer rod excessively when removing it.

7) Wipe down FS housing, shaft, oat, and retainer rod with a mixture of 1 part Hoshizaki

"Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose

with cleaning solution. Rinse the parts thoroughly with clean water.

8) Reassemble FS assembly and replace it and the rubber boot in their correct positions.

Reconnect the vent tube and the ush tube.

9) Move the control switch to the "ICE" position.

10) Replace the insulation panel and front panel in their correct positions.

11) Turn on the power supply to start the automatic icemaking process.

Legend: CB–control board; FS–oat switch

Float

Float Switch

Housing

Rubber Boot

and Hose

Retainer Rod

Flush

Vent

Shaft

Fig. 4

F. Thermistor Check

To check thermistor resistance, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel. Move the control switch to the "OFF" position.

3) Remove the control box cover.

4) Remove the thermistor from the refrigerant tubing.

5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min.

6) Disconnect the thermistor connector from CB K3 connector and check the resistance

between thermistor leads. Normal range is 4.7 to 6.2 kΩ. If outside the normal range,

replace the thermistor. See "IV.B. Component Service Information." If within the normal

range, continue to the next step.

7) Replace the thermistor in its correct position. See "IV.B. Component Service

Information."

8) Reconnect the thermistor connector to CB K3 connector.

9) Replace the control box cover in its correct position.

10) Move the control switch to the "ICE" position.

11) Replace the front panel in its correct position.

12) Turn on the power supply.

13) Once the harvest cycle starts (Comp energizes), begin timing the harvest cycle.

14) The harvest timer and harvest cycle should terminate within 2 to 5 min. If the harvest

cycle does not terminate within 2 to 5 min., replace CB.

Legend: CB–control board; Comp–compressor

Foam Insulation Thermistor Holder

Thermistor Lead Cable Tie

Fig. 5

G. Control Switch

The control switch has three positions: "OFF" for power off, "ICE" for icemaking, and

"WASH" to energize the pump motor when cleaning and sanitizing. WARNING! Control

switch in "OFF" position does not de-energize all loads. Risk of electric shock.

Use extreme caution and exercise safe electrical practices.

H. Diagnostic Tables

1. No Ice Production

No Ice Production - Possible Cause

1. Power Supply a) Off, blown fuse, or tripped breaker.

b) Not within specications.

2. Main Transformer a) Voltage tap switch not set to proper voltage.

b) Coil winding open or shorted.

3. Fuse (Control Box) a) Blown.

4. Control Switch a) In "OFF" or "WASH" position.

b) Bad contacts.

5. High-Pressure Switch a) Dirty condenser.

b) Fan motor not operating.

c) Refrigerant overcharged.

d) Bad contacts.

e) Refrigerant lines or components plugged.

6. Control Transformer

(115VAC/10.5VAC)

a) Coil winding open or shorted.

7. Control Board

See "II.C. Control Board Check"

a) In alarm.

b) Yellow "BC OPEN" LED on (bin full).

c) Defective.

8. Bin Control

See "II.D. Bin Control Check."

a) Tripped with bin lled with ice.

b) Actuator does not move freely.

c) Defective.

9. Water Supply a) Water supply off or improper water pressure.

b) External water lters clogged.

10. Inlet Water Valve a) Screen or orice clogged.

b) Coil winding open.

c) Water valve open in freeze cycle.

11. Float Switch

See "II.E. Float Switch Check

and Cleaning"

a) Float does not move freely.

b) Defective.

12. Compressor a) Compressor relay/magnetic contactor contacts bad or coil winding

open.

b) Start capacitor or run capacitor defective (single phase model).

c) Internal protector open.

d) Start relay contacts bad or coil winding open (single phase model).

e) Compressor defective.

13. Hot Gas Valve a) Closed in harvest cycle.

b) Open in freeze cycle.

14. Thermistor

See "II.F. Thermistor Check"

a) Loose, disconnected, or defective.

15. Pump Motor a) Motor winding open.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

d) Mechanical seal worn out.

No Ice Production - Possible Cause

16 Thermostatic Expansion Valve a) Bulb loose.

b) Operating erratically.

1 7. Liquid Line Valve a) Closed in freeze cycle.

b) Open in harvest cycle.

18. Fan Motor a) Motor winding open.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

19. Water System a) Water leaks causing short freeze time.

2. Low Ice Production

Low Ice Production - Possible Cause

Long Harvest Cycle

1. Evaporator a) Scaled up.

2. Spray Tubes and/or Spray

Guides

a) Dirty.

b) Out of position.

3. Refrigerant Charge a) Low.

4. Water Supply a) Low water pressure.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" Nominal ID (10 mm Nominal OD in the EU) water

tubing or equivalent.

d) Too cold.

5. Control Board

See "II.C. Control Board Check"

a) Thermistor connection loose (K3).

b) Defective.

6. Thermistor

See "II.F. Thermistor Check"

a) Loose, disconnected, or defective.

7. Hot Gas Valve a) Erratic or closed.

8. Inlet Water Valve a) Screen or orice clogged.

9. Compressor a) Inefficient or off.

10. Liquid Line Valve a) Erratic or open.

11. Thermostatic Expansion Valve a) Defective.

Short Freeze Cycle

1. Low Water Supply a) Water lters clogged.

2. Inlet Water Valve a) Screen or orice clogged.

3. Float Switch a) Float does not move freely.

b) Defective.

4. Splash Guard a) Missing or defective.

5. Check Valve a) Dirty.

b) Defective.

6. Control Board a) Defective.

Low Ice Production - Possible Cause

Long Freeze Cycle

1. Evaporator a) Scaled up, dirty.

2. Float Switch

See "II.E. Float Switch Check

and Cleaning"

a) Scaled up, dirty.

b) Float sticking.

c) Defective switch.

3. Inlet Water Valve a) Leaking by.

4. Hot Gas Valve a) Erratic or open.

5. Condenser a) Clogged.

6. Control Board

See "II.C. Control Board Check"

a) Float switch connection loose (K5).

b) Defective.

7. Refrigerant Charge a) Low.

8. Thermostatic Expansion Valve a) Bulb loose.

b) Defective.

9. Compressor a) Inefficient or off.

10. Pump Motor a) RPM too slow.

11. Liquid Line Valve a) Erratic or restricted.

3. Freeze-Up

Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist.

See "II.I. Freeze Up Check List," the Hoshizaki America Technician's Pocket Guide, or

contact your local distributor for a copy of the freeze-up checklist.

Freeze-Up - Possible Cause

Harvest Cycle

1. Evaporator a) Scaled up.

b) Damaged.

2. Cube Guides or Splash Guards a) Out of position.

b) Damaged.

3. Spray Tubes and/or Spray

Guides

a) Dirty.

b) Out of position.

4. Water Supply a) Low water pressure.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" Nominal ID (10 mm Nominal OD in the EU) copper

water tubing or equivalent.

5. Inlet Water Valve a) Screen or orice clogged.

b) Defective.

6. Float Switch

See "II.E. Float Switch Check

and Cleaning"

a) Dirty, sticking.

b) Defective.

7. Refrigerant Charge a) Low.

Freeze-Up - Possible Cause

8. Control Board

See "II.C. Control Board

Check" and "III.C. Settings and

Adjustments"

a) Harvest timer (S4 dip switch 1 & 2) set too short.

b) Harvest pump time (harvest assist) (S4 dip switch 7) not in factory

default position.

c) Defective.

9. Bin Control

See "II.D. Bin Control Check"

a) Actuator does not move or defective.

10. Thermistor

See "II.F. Thermistor Check"

a) Loose, disconnected, or defective.

11. Thermostatic Expansion Valve a) Defective.

12. Hot Gas Valve a) Closed or restricted.

13. Liquid Line Valve a) Open.

Freeze Cycle

1. Evaporator a) Scaled up.

b) Damaged.

2. Spray Tubes and/or Spray

Guides

a) Dirty.

b) Out of position.

3. Refrigerant Charge a) Low.

4. Control Board

See "II.C. Control Board Check"

a) Freeze timer (S4 dip switch 9 & 10) set incorrectly.

b) Defective.

5. Inlet Water Valve a) Leaking by.

6. Float Switch

See "II.E. Float Switch Check

and Cleaning"

a) Float does not move freely.

b) Defective.

7. Pump Motor a) RPM too slow.

b) Impeller damaged.

8. Thermostatic Expansion Valve a) Bulb loose or defective.

9. Liquid Line Valve a) Restricted.

I. Freeze-Up Check List

“MAKE COPIES AND USE AS NEEDED”

MODEL#_____________________SERIAL#_________________INSTALL DATE_____________FAIL DATE________________

Single Stack

1. Single unit or stacked equipment? [ ] [ ]

YES NO

2. Is the float switch dirty? [ ] [ ]

3. Is the water pump always running in freeze? [ ] [ ]

4. Is the thermistor properly mounted? [ ] [ ]

5. Is the TXV bulb tight and insulated? [ ] [ ]

6. Does the water sump fill to overflow in 60-90 [ ] [ ]

seconds or less when empty? Note: 1800, 2000

2400 should be 60-120 seconds

7. Is water line size 1/2”? If not________” [ ] [ ]

8. Is the water flow 3GPM for KM-150 to KM-900 [ ] [ ]

or 5GPM for KM-1200-KM-2400?

9. Only one water line per unit? If not_______ [ ] [ ]

11. Will the thermostatic bin control cycle the unit [ ] [ ]

OFF within 6-10 seconds when in contact with ice?

11a. Is the bin control capillary touching a heated [ ] [ ]

surface?

For units with mechanical style bin control:

12. Will mechanical control cycle unit off in 6 [ ] [ ]

seconds within the first 5 minutes of freeze?

12a. Is the deflector shield in place over the [ ] [ ]

control bracket.

12b. Is DIP switch number 7 ON? [ ] [ ]

12c. Is machine mounted on a dispenser? [ ] [ ]

13. Are the evaporator separators positioned [ ] [ ]

properly?

14. Is the cube guide positioned correctly? [ ] [ ]

15. Date evaporators were last cleaned? _____________________

16. Date water valve screen was last cleaned?________________

16a Does water valve close completely when [ ] [ ]

de-energized?

17. What is water pressure?___________Temperature__________

YES No

18. Does the unit have any water filtration? [ ] [ ]

If yes please list the following:

Filter brand___________________Model_________________

Filter pressure gauge reading during the fill cycle___________

Date filter was last replaced?___________________________

GPM or LPM flow rate of filter system?__________________

19. Please list the DIP switch settings.

1____2____3____4____5____6____7____8____9____10___

20. Is the cube size consistent form inlet to outlet [ ] [ ]

of evaporator?_

21. Is ice still dropping when the unit goes into freeze [ ] [ ]

22. After defrosting, was the unit leak checked? [ ] [ ]

Were any leaks found? [ ] [ ]

If so where?_________________________________________

23. Was any refrigerant added to the unit? [ ] [ ]

If so, how much?____________________________________

24.What was the head pressure? Freeze_________Harvest_______

(Freeze pressure should be taken 5 minutes into the cycle)

25. What was the suction pressure? Freeze______Harvest_______

(Freeze pressure should be taken 5 minutes into the cycle)

26. What was the length of the cycles?

Harvest_________________Freeze_________________

27. Ambient temperature at condenser? ____________________F

28. Water-cooled condenser outlet temperature______________F

29. Is the hot gas valve opening? [ ] [ ]

30. List model and manufacture of the bin____________________

_____________________________________________________

31. Has the stainless steel extension bracket been [ ] [ ]

added? (All “S” models)

32.What is the ice drop weight?____________________________

Note: Please make copies of this form and use it when diagnosing a freeze up condition.

Please submit a completed copy of the checklist with any Freeze-up labor claim form

PLEASE COMPLETE WHEN DIAGNOSING A FREEZE-UP

REFRIGERANT LEAK OR LOW CHARGE

TECHNICAL SUPPORT FAX 1-800-843-1056

III. Controls and Adjustments

• A Hoshizaki exclusive control board is employed in KM and KMH series appliances.

• All models are pretested and factory adjusted.

• For a control board check procedure, see "II.C. Control Board Check."

NOTICE

• Fragile, handle very carefully.

• The control board contains integrated circuits, which are susceptible to failure

due to static discharge. It is especially important to touch the metal part of the

icemaker when handling or replacing the control board.

• Do not touch the electronic devices on the control board or the back of the control

board.

• Do not change wiring and connections. Do not misconnect K3 WHITE, K4RED,

and K5 BLACK, because the same connector is used for the thermistor,

mechanical bin control, and oat switch.

• Do not short out power supply to test for voltage.

• Always replace the whole control board assembly if it goes bad.

A. Control Board Layout

"J" Control Board

Part Number 2A7664-04

"J" Control Board

• K4 (red) Connector

Bin Control

• K1 Connector

Pins #1 through #10

#1, 9 Compressor Relay

#2 Hot Gas Valve, X12 Relay

#3 Fan Motor

Liquid Line Valve

#4 Pump Motor (icemaking)

#5 Pump Motor

(harvest pump timer and

pump-out)

#6 Inlet Water Valve, X11 Relay

#7, 10 Component Power

Supply

#8 Open

• Bin Control Switch

Open LED (yellow)

• Bin Control Switch

Closed LED (green)

• LED 2 (X2 Relay)

LED 2 on:

K1 Connector Pin #2

LED 2 off:

K1 Connector Pin #3

• LED 3 (X3 Relay)

LED 3 on:

K1 Connector Pin #5

LED 3 off:

K1 Connector Pin #4

(energized in freeze)

• LED 4 (X4 Relay)

K1 Connector Pin #6

• LED 1 (X1 Relay)

K1 Connector Pin #1, #9

• K2 Connector

Control Transformer

(10.5VAC)

• S5 Dip Switch

• "ALARM RESET" Button

• S4 Dip Switch

• "OUTPUT TEST" Button

(used to test relays on control board)

• K3 (white) Connector

Thermistor

(harvest control and

high temperature safety)

• K5 (black) Connector

Float Switch

(water level)

• Part Number

• Alarm Buzzer

• Relay LEDs

(4) (indicate which

relays are energized

and which K1

connector pins are

energized

• POWER OK LED

(red) (lights when

10.5VAC is supplied

to K2 connector)

• Ext. Harvest LED

(yellow) (lights

when water line

thermistor initiates

extended harvest)

Not used this model

B. LED Lights and Audible Alarm Safeties

Beep occurs and red "POWER OK" LED turns on when control switch is moved to "ICE"

position.

Sequence

Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table

below. Order of green LEDs from the outer edge of control board is 1, 4, 3, 2.

Sequence Step LED

Energized

Components

Time LEDs are On

Min. Max.

1-Minute Fill Cycle 4 WV

Harvest Cycle 1, 4, 2 Comp, HGV, WV 1 minute 20 minutes

Harvest Pump Time

(harvest assist)

1, 3, 2 Comp, HGV, PM 0 seconds 50 seconds

Freeze Cycle 1 Comp, FM, PM, LLV 5 minutes freeze timer

setting

Slush Control 1, 3 Comp, FM, LLV If S5 dip switch 5 on,

PM off 10 sec. when

thermistor at 36°F (2.2°C)

Pump-Out Cycle 1, 4

†

, 3, 2 Comp, HGV, PM, WV

†

10 seconds 20 seconds

†

pump-out timer setting

Alarms

Type Alarm Notes

Beep

High Evaporator Temp.

(temperature > 127°F) (53°C)

Check for harvest problem (stuck HGV or relay), hot

water entering unit, stuck HM, or shorted thermistor.

Beep

Harvest Backup Timer

(harvest > 20 min. for two

cycles in a row)

Check thermistor (open), HGV not opening, TXV or LLV

leaking by, low charge, inefficient Comp.

Beep

Freeze Timer

(freeze > freeze timer setting

for two cycles in a row)

Check FS stuck closed (up), WV leaking by, HGV leaking

by, PM not pumping, TXV defective, LLV not opening, low

charge, or inefficient Comp.

To reset above safeties, press "ALARM RESET" button with power supply on.

6 Low Voltage

(92Vac±5% or less)

Red LED turns off if voltage protection operates.

Control voltage safeties automatically reset when voltage

is corrected.

7 High Voltage

(147Vac±5% or more)

Legend: CB–control board; Comp–compressor; FM–fan motor; FS–oat switch;

HGV–hot gas valve; L LV–liquid line valve; PM–pump motor; TXV–thermostatic

expansion valve; WV–inlet water valve

C. Settings and Adjustments

NOTICE

Dip switches are factory set. Failure to maintain factory settings may adversely

affect performance and warranty coverage. For more information, contact your

Hoshizaki Service Center.

1. Default Dip Switch Settings

The dip switches are factory-adjusted to the following positions:

S4 Dip Switch

S4 Dip Switch No. 1 2 3 4 5 6 7 8 9 10

KM-1301SAJ-E

OFF OFF ON ON ON ON ON OFF ON ON

S5 Dip Switch (Do Not Adjust)

S5 Dip Switch No.

1 2 3 4 5

KM-1301SAJ-E OFF OFF OFF OFF OFF

Freeze Timer (9 & 10)

Pump-Out Frequency Control (5)

Pump-Out Time/Harvest Time During Pump-Out (3 & 4)

Harvest Timer (1 & 2)

Factory Use (8)

Harvest Pump Time (Harvest Assist) (7) (Do Not Adjust)

1 2 3 4 5 6 7 8 9 10

S4 Dip Switch

"J" Control Board

1 2 3 4 5

S5 Dip Switch (Do Not Adjust)

"J" Control Board

Rell Counter (2 and 3)

Float Switch Control Selector (1)

Minimum Harvest Time (4)

Slush Control (5)

Harvest Pump Time Timer (Harvest Assist Duration) (6)

2. Harvest Time (S4 dip switch 1 & 2)

The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the

evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest

timer is factory set, and generally no adjustment is required. However, a setting longer

than the factory setting may be advised in cases where the drain provided at harvest

needs to be prolonged for extra cleaning. Note that the pump-out timer (S4 dip switch

3 & 4) acts in place of the harvest timer during cycles with a pump out. For details, see

"III.C.3. Pump-Out Timer (S4 dip switch 3& 4)."

Note: On models with a pump-out every cycle, the harvest timer is only relevant during

the initial harvest cycle since a pump out occurs every cycle thereafter.

S4 Dip Switch Setting

Time

(sec.)

No. 1 No. 2 S5-4 OFF S5-4 ON

OFF OFF 60 30

ON OFF 90 45

OFF ON 120 60

ON ON 180 75

3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4)

NOTICE

Do not adjust 3 off and 4 on. Pump motor does not run in pump-out rotation in this

setting.

When a pump-out is called for, the pump motor stops for 2 sec., then energizes in the

reverse direction, taking water from the bottom of the water tank and forcing pressure

against the check valve seat allowing water to go through the check valve and down the

drain. At the same time, water ows through the small tube to power ush the oat switch.

The pump motor drains the water tank for the time determined by the pump-out timer.

The pump-out timer also acts in place of the harvest timer during cycles with a pump-out.

The pump-out timer is factory set, and generally no adjustment is required. However,

where water quality is bad and the icemaker needs a longer pump-out time, the pump-out

timer can be adjusted. The pump-out time can be set to pump-out for 10or 20 sec. During

pump-out cycles minimum harvest time is based on times given in the table below.

S4 Dip Switch Setting Time (sec.)

Inlet Water

Valve

No. 3 No. 4

T1 T2

S5-4 OFF S5-4 ON S5-4 OFF S5-4 ON

OFF OFF 10 150 100 Closed Closed

ON OFF 10 180 130 Closed Closed

OFF ON 10 120 70 Open Closed

ON ON 20 180 180 Closed Closed

T1: Time to drain the water tank

T2: Harvest timer at pump out

4. Pump-Out Frequency Control (S4 dip switch 5)

The pump-out frequency control is factory set to drain the water tank every 10 cycles.

Generally no adjustment is required. However, where water quality is bad and the

icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The

pump-out frequency control can be set to have a pump-out occur every cycle, or every

10 cycles.

The rst pump-out is dependent on S4 dip switch 5. See the table below.

S4 Dip Switch Setting

Pump-Out Frequency 1st Pump-Out

No. 5

OFF Every 10 cycles After 11th freeze cycle

ON Every cycle After 2nd freeze cycle

5. Harvest Pump Time (Harvest Assist) (S4 dip switch 6)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside of the factory

default setting may result in damage to the appliance.

Harvest pump time (harvest assist) is only active when S4 dip switch 7 is in the "ON"

position. In the factory default position, the harvest pump time (harvest assist) starts with

50sec. left to go in harvest cycle (S4 dip switch 6) and after the thermistor reaches 48°F

(9°C) at the evaporator outlet and the control board reads 3.9kΩ from the thermistor. The

harvest pump time (harvest assist) is factory set, and no adjustment is required.

S4 Dip Switch Setting

Harvest Pump Time

(Harvest Assist)

No. 6 S5-4 OFF S5-4 ON

OFF 50 sec. 25 sec.

ON 25 sec. 15 sec.

6. Harvest Pump Time (Harvest Assist) (S4 dip switch 7)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside of the factory

default setting may result in damage to the appliance.

Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized

during the last seconds of the harvest cycle. When the pump motor is energized (S4 dip

switch 7 on), water circulates over the evaporator. The harvest water valve is open during

harvest for a maximum of 6 minutes or the length of harvest minus the harvest pump time

value(S4 dip switch 6), whichever is shorter.

When S4 dip switch 7 is in the on position and harvest begins, X11 and X10 relays

energize. A latching circuit is created through the X11 and X10 relays. For further details,

see "VIII.B. Wiring Diagrams." In the factory default position, 50 sec. before harvest

termination, LED 4 turns off, inlet water valve and X11 relay de-energize. X10 relay

remains energized through the latching circuit. Next, LED 3 turns on and control board

K1connector pin #5 (DBU wire) energizes, energizing the pump motor for the last

seconds of harvest. Harvest pump time adjusted by S4 dip switch 1 & 2 and S5 dip switch

4settings. Contact Technical Support before adjusted these settings.

S4 Dip Switch Setting

Harvest Pump Time

(Harvest Assist)

No. 7

OFF Disabled

ON Enabled

7. Factory Use (S4 dip switch 8)

Factory set for proper operation. Do not adjust. This must be left in the factory default

position.

8. Freeze Timer (S4 dip switch 9 & 10)

NOTICE

Adjust to proper specication, or the icemaker may not operate correctly.

The freeze timer setting determines the maximum allowed freeze time to prevent possible

freeze-up issues. Upon termination of the freeze timer, the control board initiates the

harvest cycle or pump-out cycle. After 2 consecutive freeze timer terminations, the control

board shuts down the icemaker. In this case, see "II.H.3. Low Ice Production" for possible

solutions. The freeze timer is factory set and no adjustment is required. Before changing

this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations.

S4 Dip Switch Setting Time

(min.)

No. 9 No. 10

OFF OFF 60

OFF ON 50

ON OFF 70

ON ON 75

9. Float Switch Control Selector (S5 dip switch 1)

NOTICE

Do not adjust. This must be left in the factory default position or the icemaker will

not operate correctly. The KM-1301SAJ-E uses a single oat switch with no rells.

Float switch selector used in applications where rell is required in the freeze cycle. Rells

set by S5 dip switch 2 and 3. Note: In single oat switch with upper oat operation only

1rell allowed.

• Single oat switch application:

• With S5 dip switch 1 in the "OFF" position, control board monitors the lower oat switch

for rell operation.

• With S5 dip switch 1 in the "ON" position, the control board monitors the upper oat

switch for rell operation. In this case no upper oat switch exists, therefore the control

board reads an open upper oat switch immediately when the freeze cycle starts and

initiates a rell. Since there is no upper oat switch to close and terminate the rell, the

rell lasts for a maximum of 1-min. During the 1-min. rell, LED 4 is on.

• Double oat switch application: Float switch control selector determines which oat switch

(upper or lower) the control board monitors for rell control during the freeze cycle.

S5 Dip Switch Setting

Pump-Out ComponentsNo. 1

OFF Bottom Float Switch Control

Top Float Switch Control

(this setting is ignored if rell counter

(S5 dip switch 2 and 3) set to 0)

10. Rell Counter (S5 dip switch 2 and 3)

NOTICE

Do not adjust. These must be left in the factory default position or the icemaker will

not operate correctly.

S5 Dip Switch Setting Rell

Counter

No. 2 No. 3

OFF OFF 0

OFF ON 1 rell

ON OFF 9 rells

ON ON 10 rells

11. Minimum Harvest Time (S5 dip switch 4)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside the factory

default setting may result in damage to the appliance.

S5 Dip Switch Setting Minimum

Harvest Timer

No. 4

OFF 120 sec.

ON 70 sec.

12. Slush Control (S5 dip switch 5)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside the factory

default setting may result in damage to the appliance.

This dip switch setting provides slush control during the freeze cycle. When the

evaporator temperature reaches 36°F (2.2°C) the control board reads a 5.8kΩ signal from

the thermistor and de-energizes the water pump for 10 sec. to melt ice slush and prevent

ice slush from blocking the water supply tubing, causing irregular freeze patterns.

S5 Dip Switch Setting

Slush ControlNo. 5

OFF Disabled

ON Enabled

IV. Refrigeration Circuit and Component Service Information

WARNING

• This appliance should be diagnosed and repaired only by qualied service

personnel to reduce the risk of death, electric shock, serious injury, or re.

• Move the control switch to the "OFF" position and turn off the power supply. Place

the disconnect in the "OFF" position. Lockout/Tagout to prevent the power supply

from being turned back on inadvertently.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after the icemaker is serviced. Make sure that none have fallen

into the dispenser unit/ice storage bin.

• Make sure all food zones in the icemaker and dispenser unit/ice storage bin are

clean after service.

A. Refrigeration Circuit Service Information

WARNING

• Repairs requiring the refrigeration circuit to be opened must be performed by

properly trained and EPA-certied service personnel.

• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of

refrigerant to the system (if using an electronic leak detector), and then raise the

pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with

pressurized air for leak testing.

NOTICE

• Always recover the refrigerant and store it in an approved container. Do not

discharge the refrigerant into the atmosphere.

• Do not leave the system open for longer than 15 min. when replacing or servicing

parts. The Polyol Ester (POE) oils used in R-404A applications can absorb

moisture quickly. Therefore it is important to prevent moisture from entering the

system when replacing or servicing parts.

• Always install a new drier every time the sealed refrigeration system is opened.

Do not replace the drier until after all other repair or replacement has been made.

Install the new drier with the arrow on the drier in the direction of the refrigerant

ow.

• When brazing, protect the drier by using a wet cloth to prevent the drier from

overheating. Do not allow the drier to exceed 250°F (121°C).

1. Refrigerant Recovery

The icemaker is provided with refrigerant service valves. Using proper refrigerant practices,

recover the refrigerant. Store the refrigerant in an approved container. Do not discharge the

refrigerant into the atmosphere.

2. Brazing

WARNING

• R-404A itself is not ammable at atmospheric pressure and temperatures up to

176°F (80°C).

• R-404A itself is not explosive or poisonous. However, when exposed to high

temperatures (open ames), R-404A can be decomposed to form hydrouoric

acid and carbonyl uoride both of which are hazardous.

• Do not use silver alloy or copper alloy containing arsenic.

1) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG.

Note: Because the pipes in the evaporator case are specially coated to resist corrosion,

it is important to make connections outside the evaporator case when possible. If

it is necessary to braze inside the evaporator case, use sandpaper to remove the

coating from the brazing connections before unbrazing the components.

NOTICE

• Always install a new drier every time the sealed refrigeration system is opened.

• Do not replace the drier until after all other repair or replacement has been made.

Install the new drier with the arrow on the drier in the direction of the refrigerant

ow.

• When brazing, protect the drier by using a wet cloth to prevent the drier from

overheating. Do not allow the drier to exceed 250°F (121°C).

2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of

refrigerant to the system (if using an electronic leak detector), and then raise the

pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with

pressurized air for leak testing.

3. Evacuation and Recharge (R-404A)

1) Attach a vacuum pump to the system. Be sure to connect the charging hoses to both

high and low-side refrigerant access valves.

IMPORTANT

The vacuum level and vacuum pump may be the same as those for current

refrigerants. However, the rubber hose and gauge manifold to be used for

evacuation and refrigerant charge should be exclusively for POE oils.

2) Turn on the vacuum pump. Open the gauge manifold valves, then open the high and

low-side service valves. Never allow the oil in the vacuum pump to ow backwards.

3) Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends

on pump capacity.

4) Close the low-side valve and high-side valve on the gauge manifold.

5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a

refrigerant service cylinder. Remember to loosen the connection and purge the air from

the hose. For the required refrigerant charge, see the rating label inside the icemaker.

Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets

ARI Standard 700 (latest edition) be used.

6) A liquid charge is required when charging an R-404A system (to prevent fractionation).

Place the service cylinder on the scales; if the service cylinder is not equipped with

a dip tube, invert the service cylinder, then place it on the scales. Open the high-side

valve on the gauge manifold.

7) Allow the system to charge with liquid until the proper charge weight is met.

8) If necessary, add any remaining charge to the system through the low-side.

NOTICE!To prevent compressor damage, use a throttling valve or liquid

dispensing device to add the remaining liquid charge through the low-side

refrigerant service valve with the icemaker running.

9) Close the high and low-side service valves, then close the high and low-side gauge

manifold valves. Disconnect the gauge manifold hoses.

10) Cap the refrigerant service valves to prevent a possible leak.

B. Component Service Information

NOTICE

When replacing a component listed below, see the notes to help ensure proper

operation.

Component Notes

Compressor 1 phase: Install a new start capacitor, run capacitor, and start relay.

Thermostatic

Expansion Valves

• Attach the thermostatic expansion valve bulb to the suction line in the same location

as the previous bulb.

• The bulb should be between the 10 and 2 o'clock positions on the tube.

• Secure the bulb with the clamp and holder, then insulate it.

Hot Gas Valves

Liquid Line Valves

• Replace the strainer if applicable.

• Use copper tube of the same diameter and length when replacing valve lines.

Fan Motors Install a new capacitor.

Pump Motor Install a new capacitor.

Thermistor • Attach the new thermistor to the suction line in the same location as the previous

thermistor.

• The thermistor should be at the 12 o'clock position on the tube.

• Smoothly ll the recessed area of the thermistor holder with high thermal

conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone

Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV

(manufactured by ShinEtsu Silicones), or equivalent are recommended.

• Secure the thermistor with the holder, then insulate it.

• Be very careful to prevent damage to the leads.

V. Maintenance

The maintenance schedule below is a guideline. More frequent maintenance may be

required depending on water quality, the appliance's environment, and local sanitation

regulations

WARNING

• Only qualied service technicians should service the appliance.

• To reduce the risk of electric shock, do not touch the control switch or service

switch with damp hands

• Before servicing: Move the control switch to the "OFF" position and turn off the

power supply. Place the disconnect in the "OFF" position.

Lockout/Tagout to prevent the power supply from being turned back on

inadvertently.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after any maintenance is done to the icemaker. Make sure that

none have fallen into the dispenser unit/ice storage bin.

Maintenance Schedule

Frequency Area Task

Daily Scoop Clean the ice scoop using a neutral cleaner. Rinse thoroughly after

cleaning.

Bi-Weekly Air Filters Inspect. Wash with warm water and neutral cleaner if dirty.

Monthly External Water

Filters

Check for proper pressure and change if necessary.

Icemaker Exterior Wipe down with a clean, soft cloth. Use a damp cloth containing a

neutral cleaner to wipe off oil or dirt build up. Clean any chlorine staining

(rust colored spots) using a non-abrasive cleanser.

Yearly Icemaker and

Dispenser Unit/Ice

Storage Bin Liner

Clean and sanitize per the cleaning and sanitizing instructions provided

in the instruction manual or maintenance label on the icemaker.

Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the water

system. Clean the water supply inlet screen.

Condenser Inspect. Clean if necessary by using a brush or vacuum cleaner. More

frequent cleaning may be required depending on location.

Water Hoses Inspect the water hoses and clean/replace if necessary.

VI. Preparing the Icemaker for Periods of Non-Use

NOTICE

• When storing the appliance for an extended time or in sub-freezing temperatures,

follow the instructions below to prevent damage.

• To prevent damage to the water pump, do not operate the appliance with the

control switch in the "WASH" position when the water tank is empty.

When the appliance is not used for two or three days under normal conditions, it is

sufficient to move the control switch to the "OFF" position. When storing the appliance for

an extended time or in sub-freezing temperatures, follow the instructions below.

1. Remove the water from the icemaker water supply line:

1) Turn off the power supply, then remove the front panel.

2) Move the control switch to the "OFF" position.

3) Close the icemaker water supply line shut-off valve, then open the icemaker water

supply line drain valve.

4) Allow the line to drain by gravity.

5) Attach a compressed air or carbon dioxide supply to the icemaker water supply line

drain valve.

6) Move the control switch to the "ICE" position.

7) Replace the front panel in its correct position, then turn on the power supply.

8) Blow the icemaker water supply line out using the compressed air or carbon dioxide

supply.

9) Close the icemaker water supply line drain valve.

2. Drain the water tank:

1) Turn off the power supply, then remove the front panel.

2) Move the control switch to the "OFF" position.

3) Remove the insulation panel. Remove the drain plug located on the lower front part of

the ice chute. See Fig. 6. Allow the water tank to drain.

4) Replace the drain plug and the insulation panel in their correct positions. Be careful not

to cross thread the drain plug.

5) Remove all ice from the dispenser unit/ice

storage bin. Clean the dispenser unit/ice

storage bin liner using a neutral cleaner.

Rinse thoroughly after cleaning.

6) Replace the front panel in its correct

position.

Fig. 6

Drain Plug

Ice Chute

Float Switch Assembly

Cleaning Valve

VII. Disposal

The appliance contains refrigerant and must be disposed of in accordance with

applicable national, state, and local codes and regulations. Refrigerant must be

recovered by properly certied service personnel.

VIII. Technical Information

We reserve the right to make changes in specications and design without prior notice.

A. Specication and Performance Data

Pressure data is recorded at 5 min. into freezing cycle. The data not in bold

should be used for reference only.

1. KM-1301SAJ-E

Specification Sheet

AC SUPPLY VOLTAGE 220-240/50/1

AMPERAGE 11.35 A (5 Min. Freeze AT 104°F / WT 80°F)

MINIMUM CIRCUIT AMPACITY 20 A

MAXIMUM FUSE SIZE 20 A

ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F

ELECTRIC W (kWH/100 lbs.) 2080 (4.52) 1900 (3.32)

WATER gal./24HR (gal./100 lbs.) 386 (34.9) 604 (43.9)

APPROXIMATE ICE PRODUCTION

10/10°C 20/15°C 30/25°C

PER 24 HR. FOR EUROPE MARKET

1300 (589) 1356 (615) 1164 (528)

lbs./day (kg/day)

SHAPE OF ICE

Crescent Cube

ICE PRODUCTION PER CYCLE 36 lbs. (16.3 kg) 1440pcs.

BIN CONTROL SYSTEM Mechanical Switch

REFRIGERANT CHARGE R404A, 4 lb. 3 oz. (1900g)

Performance Data Sheet

70/21 1375 624

1296 588 1178 535

80/27 1315 596 1191 540 1069 485

90/32 1296 588 1105 501 982 445

lbs./day kg./day

100/38 1269 576 1076 488 869 394

70/21

80/27

90/32

watts 100/38

70/21 604 2.28

540 2.04 493 1.87

80/27 555 2.10 456 1.73 432 1.63

90/32 540 2.04 386 1.46 351 1.33

gal./day m

/day

100/38 461 1.74 378 1.43 319 1.21

70/21

80/27

90/32

min. 100/38

70/21

80/27

90/32

min. 100/38

70/21 239 16.8

260 18.2 278 19.6

80/27 255 17.9 287 20.1 300 21.1

90/32 260 18.2 309 21.7 325 22.9

PSIG kg/cm

100/38 260 18.3 313 22.0 340 23.9

70/21 51 3.6 53 3.7 56 3.9

80/27 52 3.7 55 3.9 58 4.1

90/32 53 3.7 57 4.0 60 4.2

PSIG kg/cm

100/38 54 3.8 58 4.1 63 4.4

16,100 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

TOTAL HEAT OF REJECTION FROM COMPRESSOR 2,600 BTU/h [AT 90ºF (32ºC) / WT 70ºF (21ºC)]

APPROXIMATE ICE PRODUCTION

PER 24 HR.

AMBIENT TEMP.

(ºF/ºC)

WATER TEMP. (ºF/ºC)

50/10 70/21 90/32

APPROXIMATE ELECTRIC

CONSUMPTION

1900 1953 2005

1940 2022 2063

1953 2080 2127

1956 2091 2170

APPROXIMATE WATER

CONSUMPTION PER 24 HR.

FREEZING CYCLE TIME

29 31 35

31 34 39

31 37 41

32 38 45

HARVEST CYCLE TIME

4.0 3.9 3.8

3.9 3.7 3.8

3.9 3.6 3.6

TOTAL HEAT OF REJECTION FROM CONDENSER

3.8 3.6 3.6

HEAD PRESSURE

SUCTION PRESSURE

ENG.F-011.1.0205

B. Wiring Diagram

* High-Pressure Switch

Air-Cooled Model

Cut-out 412±

PSIG

Cut-in 327±22 PSIG

Hoshizaki KM1301SAJE KM-1301SAJ-E 48" Stackable Ice Modular

Product's Documents

Service Manual

Specifications

Hoshizaki KM1301SAJE Questions and Answers