Hoshizaki F1A-HS 27.5'' 23.1 cu. ft. Top Mounted 1 Section User Manual

Models

Upright A-Series

Steelheart Series

Refrigerated Kitchen Equipment

Service Manual

Number: 73237

Issued: 2-25-2019

Revised: 3-24-2022

hoshizakiamerica.com

WARNING

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

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

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

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

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

performance, component life, and warranty coverage. 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 appliance.

Should the reader have any questions or concerns which have not been satisfactorily

addressed, please call, send an e-mail message, or write to the Hoshizaki Technical

Support Department for assistance.

Phone: 1-800-233-1940; (770) 487-2331

Fax: 1-800-843-1056; (770) 487-3360

E-mail: techsuppor[email protected]

618 Highway 74 South

Peachtree City, GA 30269

Attn: Hoshizaki Technical Support Department

Web Site: www.hoshizaki.com

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

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.

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.

CONTENTS

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

I. General Information ............................................................................................................ 8

A. Construction .................................................................................................................. 8

B. Refrigeration Flow Chart ............................................................................................. 10

II. Sequence of Operation and Service Diagnosis ................................................................11

A. Sequence of Operation Flow Charts ............................................................................11

1. Refrigerator .............................................................................................................11

2. Freezer .................................................................................................................. 12

B. Service Diagnosis ....................................................................................................... 13

1. Refrigerator ............................................................................................................ 15

2. Freezer .................................................................................................................. 19

C. Control Module Check ................................................................................................. 23

D. Thermistor Check ........................................................................................................ 24

E. Diagnostic Tables ........................................................................................................ 25

III. Controls and Adjustments ............................................................................................... 27

A. Control Module ............................................................................................................ 27

B. Temperature ............................................................................................................... 29

1. Default Settings ...................................................................................................... 29

2. Temperature Setpoint ............................................................................................ 29

3. Changing the Temperature Display Scale (°F or °C) ............................................. 29

C. Defrost ........................................................................................................................ 30

D. Alarm Safeties ............................................................................................................. 31

E. Safety Devices and Light Control ................................................................................ 32

F. Mullion/Perimeter Heater ............................................................................................. 32

IV. Refrigeration Circuit and Component Service Information.............................................. 33

A. Service for Refrigerant Lines ....................................................................................... 35

B. Component Service Information .................................................................................. 38

C. Door Reversal ............................................................................................................. 38

V. Maintenance .................................................................................................................... 39

VI. Preparing the Appliance for Periods of Non-Use ............................................................ 40

VII. Disposal ......................................................................................................................... 41

VIII. Technical Information .................................................................................................... 42

A. Electrical and Refrigerant Data ................................................................................... 42

B. Wiring Diagrams .......................................................................................................... 43

1. R1A/R2A/F1A-FG/FGCL/FGCR/FS/FSJ/FSL/FSLJ/HG/HS/HSL, ........................ 43

PT1A-FG-FG/FS-FS/HS-HS ................................................................................. 43

2. RN1A-FS, RT1A-FS-FS ......................................................................................... 44

3. RN2A-FS, RT2A-FS-FS ........................................................................................ 45

4. PT2A-FG-FG/FS-FS/HS-HS .................................................................................. 46

5. R3A-FG/FGCL/FGCR/FS/FSCL/FSCR/HS/HG .................................................... 47

6. F2A-FG/FS/HG/HS .............................................................................................. 48

7. F3A-FS/HS ............................................................................................................. 49

8. DT1A-HS ............................................................................................................... 50

9. DT2A-FS/HS .......................................................................................................... 51

DANGER

Risk of Fire or Explosion

Flammable Refrigerant Used

• Follow handling instructions carefully

in compliance with U.S. government

regulations.

• Do not use mechanical devices to defrost.

• Do not puncture refrigerant tubing. Risk

of re or explosion due to puncture

of refrigerant tubing; follow handling

instructions carefully.

• Component parts shall be replaced with

like components.

• Servicing shall be done by factory

authorized service personnel to minimize

the risk of possible ignition due to incorrect

parts or improper service.

• Consult instruction manual/ service

manual before attempting to install or

service this product. All safety precautions

must be followed.

• Dispose of properly in accordance with

federal or local regulations.

• Do not place any potential ignition sources

in or near the appliance.

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.

DANGER

Indicates a hazardous situation that, if not avoided, will result in

death or serious injury.

WARNING

Indicates a hazardous situation that, if not avoided, could result

in death or serious injury.

NOTICE

Indicates a situation that, if not avoided, could result in damage

to the appliance or property.

IMPORTANT

Indicates important information about the use and care of the

appliance.

Risque De Feu Ou D'Explosion

Le Frigorigène Est Inammable

• Suivre attentivement les instructions

de manipulation conformément à la

réglementation gouvernementale.

• Ne pas utiliser d'appareils mécaniques

pour dégivrer le réfrigérateur.

• Ne pas perforer la tubulure contenant le

frigorigène. Risque de feu ou d'explosion

si la tubulure contenant le frigorigène

est perforée; suivre les instructions de

manutention avec soin.

• Les pièces des composants doivent être

remplacées par des pièces et accessoires

équivalents.

• L’entretien doit être effectué par le

personnel de service autorisé par le

fabricant an de minimiser les risques

d’inammation attribuables à l’installation

d’une pièce inadéquate ou à la mauvaise

exécution du service.

• Consulter le manuel du propriétaire/

guide de réparation avant de tenter une

réparation. Toutes les mesures de sécurité

doivent être respectées.

• Éliminer conformément aux règlements

fédéraux ou locaux.

• Ne placez aucune source d’inammation

potentielle dans ou près de l’appareil.

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 install,

operate, and maintain the appliance

in accordance with this manual will

adversely affect safety, performance,

component life, and warranty coverage.

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 the appliance.

• Wear appropriate personal protective

equipment (PPE) when servicing the

appliance.

• The appliance must be installed in

accordance with applicable national, state,

and local codes and regulations.

• Appliance is heavy. Use care when lifting

or positioning. Work in pairs when needed

to prevent injury or damage. Do not lift

using the top section or the doors/drawers.

• To reduce the risk of electric shock, do not

touch the plug with damp hands.

• Unplug the appliance before servicing.

• The appliance 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 APPLIANCE MUST BE

GROUNDED. The appliance is equipped

with a NEMA5-15 three-prong grounding

plug to reduce the risk of potential

shock hazards. It must be plugged into a

properly grounded, independent 3-prong

wall outlet. If the outlet is a 2-prong outlet,

it is your personal responsibility to have

a qualied electrician replace it with a

properly grounded, independent 3-prong

wall outlet. Do not remove the ground

prong from the power cord and do not use

an adapter plug. Failure to follow these

instructions may result in death, electric

shock, or re.

• Do not use an extension cord.

• Do not use an appliance with a damaged

power cord. The power cord should not be

altered, jerked, bundled, weighed down,

pinched, or tangled. Such actions could

result in electric shock or re. To unplug

the appliance, be sure to pull the plug, not

the cord, and do not jerk the cord.

• The GREEN ground wire in the factory-

installed power cord is connected to the

appliance. If it becomes necessary to

remove or replace the power cord, be

sure to connect the power cord's ground

wire.

• Do not splash, pour, or spray water

directly onto or into the appliance. This

might cause short circuit, electric shock,

corrosion, or failure.

• Do not make any alterations to the

appliance. Alterations could result in

electric shock, injury, re, or damage to

the appliance.

• 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.

WARNING, continued

• Do not put warm or hot foods in the cabinet.

Let them cool rst, or they will raise the

cabinet temperature and could deteriorate

other foods in the cabinet or overload the

appliance.

• Food storage and handling must comply with

applicable codes and regulations.

• All foods should be wrapped in plastic lm

or stored in sealed containers. Otherwise

foods may dry up, pass their smells onto

other foods, cause frost to develop, result in

poor appliance performance, or increase the

likelihood of cross-contamination. Certain

dressings and food ingredients, if not

stored in sealed containers, may accelerate

corrosion of the evaporator, resulting in

failure.

• Do not store items near air outlets.

Otherwise, items may freeze up and

crack or break causing a risk of injury or

contamination of other food.

NOTICE

• Protect the oor when moving the appliance

to prevent damage to the oor.

• Keep ventilation openings, in the appliance

enclosure or in the built-in structure, clear of

obstruction.

• Do not allow the appliance to bear any

outside weight.

• To prevent deformation or cracks, do not

spray insecticide onto the plastic parts or let

them come into contact with oil.

• To avoid damage to the gasket, use only the

door handle when opening and closing.

WARNING, continued

• Children should be properly supervised

around the appliance.

• Do not climb, stand, or hang on the

appliance or doors or allow children or

animals to do so. Do not climb into the

appliance or allow children or animals to

do so. Death or serious injury could occur

or the appliance could be damaged.

• Be careful not to pinch ngers when

opening and closing the doors or when

handling food pans. Be careful when

opening and closing the doors when

children are in the area.

• Open and close the doors with care.

Opening the doors too quickly or forcefully

may cause injury or damage to the

appliance or surrounding equipment.

• Do not use combustible spray or place

volatile or ammable substances in or

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 equipment.

• Do not throw anything onto the shelves

or load any single shelf with more than

120lb. (54.5 kg) of product. They might fall

off and cause injury.

• The appliance is designed only for

temporary storage of food. Employ

sanitary methods. Use for any other

purposes (for example, storage of

chemicals or medical supplies such

as vaccine and serum) could cause

deterioration of stored items.

• Do not place any product on the oor of

the cabinet. All product must be placed on

properly installed shelves.

• Do not block air inlets or outlets, otherwise

cooling performance may be reduced.

• Do not tightly pack the cabinet. Allow

some space between items to ensure

good air ow. Also allow space between

items and interior surfaces.

I. General Information

A. Construction

1. Solid Door Models

Condenser Fan Motor

Condenser

Control Module

Front Panel

Door

Gasket

Door Lock

Model Shown: R1A-FS

Light

Compressor

Power Cord

Door Switch

Thermostatic

Expansion Valve

Defrost Thermistor

Evaporator

Cabinet

Thermistor

Wick

Control Panel

Evaporator Fan Motor

Model Shown: PT1A-FS-FS

Control Module

Control

Panel

Door

Gasket

Door

2. Glass Door Models

Condenser Fan Motor

Condenser

Control Module

Door

Gasket

Model Shown: R2A-FG

Compressor

Power Cord

Thermostatic

Expansion Valve

LED Lights

Glass Door

Models

Model Shown: R2A-FG

24VDC Driver

Glass Door

Models

Control Panel

Front Panel

Wick

Defrost Thermistor

Evaporator

Cabinet

Thermistor

Evaporator Fan Motor

Door Lock

Model Shown: PT2A-FG-FG

Control Module

Control

Panel

Door

Gasket

Door

Thermostatic

Expansion Valve

Heater

Evaporator Fans

(quantity depends on model)

Evaporator

Thermostatic Expansion Valve

Compressor

Condensate Pan

High-Pressure Switch

Drier

Condenser Fan

Condenser

Defrost

Thermistor

Defrost Heater and

Defrost Thermostat

(Freezer only)

Cabinet Thermistor

B. Refrigeration Flow Chart

Thermostatic Expansion

Valve Heater

2-Section Models Only

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Charts

1. Refrigerator

3. Cool Down Restart

1. Startup/Cool Down

2. Cool Down Achieved

CTh in control

Slight

Delay at

Startup

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

38°F (3°C)

CTh warms

to 3°F (1.7°C)

above setpoint

4. Defrost

5. Defrost Termination

Note:

a) EvapFM delays energizing if DTh above 50°F (10°C).

b) EvapFM de-energizes when door is opened on -FS models and when upper door is opened

on -HS models.

c) 2-min. minimum Comp on timer starts when Comp energizes.

d) 2-min. minimum Comp off timer starts when Comp de-energizes.

e) 5-min. minimum defrost time.

f) 1-hr. maximum defrost time.

g) "dEF" displayed during defrost.

h) 15-minute temperature delay timer starts when Comp/ConFM energize.

i) MH and BH de-energizes when Comp and CondFM de-energize on PT2A, RN2A, and RT2A models.

Power on

2-min. Comp off

timer starts

2-min. Comp on

timer starts

2-hr cumulative compressor run or

2-hr continuous compressor run

defrost timer terminates

Legend:

BH-bottom heater

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DTh-defrost thermistor

EvapFM-evaporator fan motor

MH-mullion heater

TXVH-thermostatic expansion

valve heater

5-min.

minimum

defrost

DTh in control

DTh warms to

44°F (6.6°C) or

1-hr maximum

defrost timer

terminates

Comp energized

ConFM energized

EvapFM energized

MH/BH energized

(PT2A, R_2A)

Comp de-energized

ConFM de-energized

MH de-energized (PT2A, R_2A)

EvapFM de-energized

(60-sec. delay

before de-energized)

EvapFM energized

Comp de-energized

ConFM de-energized

MH/BH de-energized (PT2A, R_2A)

Comp energized

ConFM energized

EvapFM energized

MH/BH energized

(PT2A, R_2A)

Cycle Steps

Refrigerator Sequence Flow Chart

MH energized

TXVH energized

(R2A Models)

2-hr cumulative compressor run

or 2-hr continuous compressor

run defrost timer starts

2. Freezer

3. Cool Down Restart

Legend:

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DH-defrost heater

DrH-drain heater

DTh-defrost thermistor

EvapFM-evaporator fan motor

MH-mullion heater

PH-perimeter heater

TXVH-thermostatic expansion

valve heater

1. Startup/Cool Down

2. Cool Down Achieved

Comp energized

ConFM energized

EvapFM energized

(30-sec. delay

after Comp

energized)

CTh in control

Slight

Delay at

Startup

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

-2°F (-19°C)

CTh warms

to 3°F (1.7°C)

above setpoint

4. Defrost

Comp de-energized

ConFM de-energized

EvapFM de-energized

(60-sec. delay

after Comp

de-energized)

5. Defrost Termination

DH de-energized

*After Drip Time Delay:

Comp energized

ConFM energized

EvapFM energized

*(Once DTh reaches 15°F (-9°C)

or 4-min. EvapFM terminates,

whichever comes rst)

DTh warms to 77°F (25°C)

or 1-hr maximum defrost

timer terminates

Note: *Delays

a) EvapFM delays energizing if DTh above 32°F (0°C).

b) EvapFM de-energizes when door is opened on -FS models and when upper door is

opened on -HS models.

c) 2-min. minimum Comp on timer starts when Comp energizes.

d) 2-min. minimum Comp off timer starts when Comp de-energizes.

e) 5-min. minimum defrost time.

f) 1-hr. maximum defrost time.

g) "dEF" displayed during defrost.

h) 3-min. Comp/ConFM delay timer starts when defrost termination temperature is met.

i) 4-minute EvapFM delay timer starts when Comp/ConFM delay timer terminates

j) 15-minute temperature delay timer starts when EvapFM energizes

Power on

DH energized

Comp de-energized

ConFM de-energized

EvapFM de-energized

2-min. Comp off

timer starts

2-min. Comp on

timer starts

5-hr. cumulative Comp run or

4-hr. continuous run defrost

timer terminates

Freezer Sequence Flow Chart

DrH energized

MH energized

PH energized

TXVH energized

(F2A Models)

5-min.

minimum

defrost

DTh in

control

5-hr. cumulative Comp run or

4-hr. continuous run defrost

timer starts

DANGER

Risk of Fire or Explosion

Flammable Refrigerant Used

• Follow handling instructions carefully

in compliance with U.S. government

regulations.

• Do not use mechanical devices to defrost.

• Do not puncture refrigerant tubing. Risk

of re or explosion due to puncture

of refrigerant tubing; follow handling

instructions carefully.

• Component parts shall be replaced with

like components.

• Servicing shall be done by factory

authorized service personnel to minimize

the risk of possible ignition due to

incorrect parts or improper service.

• Consult instruction manual/service manual

before attempting to install or service this

product. All safety precautions must be

followed.

• Dispose of properly in accordance with

federal or local regulations.

• Do not place any potential ignition sources

in or near the appliance.

Risque De Feu Ou D'Explosion

Le Frigorigène Est Inammable

• Suivre attentivement les instructions

de manipulation conformément à la

réglementation gouvernementale.

• Ne pas utiliser d'appareils mécaniques

pour dégivrer le réfrigérateur.

• Ne pas perforer la tubulure contenant le

frigorigène. Risque de feu ou d'explosion

si la tubulure contenant le frigorigène

est perforée; suivre les instructions de

manutention avec soin.

• Les pièces des composants doivent être

remplacées par des pièces et accessoires

équivalents.

• L’entretien doit être effectué par le

personnel de service autorisé par le

fabricant an de minimiser les risques

d’inammation attribuables à l’installation

d’une pièce inadéquate ou à la mauvaise

exécution du service.

• Consulter le manuel du propriétaire/

guide de réparation avant de tenter une

réparation. Toutes les mesures de sécurité

doivent être respectées.

• Éliminer conformément aux règlements

fédéraux ou locaux.

• Ne placez aucune source d’inammation

potentielle dans ou près de l’appareil.

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.

• Wear appropriate personal protective equipment (PPE) when servicing the

appliance.

• Risk of electric shock. Use extreme caution and exercise safe electrical practices.

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

• Appliance is heavy. Use care when lifting or positioning. Work in pairs when

needed to prevent injury or damage.

• Make sure all food zones are clean after the appliance is serviced.

NOTICE

• This appliance is not intended for outdoor use.

• Normal operating ambient temperature:

– Refrigerators and Solid Door Freezers 45°F to 100°F (7°C to 38°C)

– Glass Door Freezers 45°F to 80°F (7°C to 27°C)

Operation of the appliance, for extended periods, outside of this normal

temperature range may affect appliance performance.

• The appliance must not be located next to ovens, grills, or other high heat

producing equipment.

• The appliance must not be located in a corrosive environment.

• Minimum Clearance:

Models Side Top Rear

Refrigerators and Freezers

(Except 2-Section Freezers)

0" (0 cm) 0" (0 cm) 3" (8 cm)

2-Section Freezers 0" (0 cm) 10" (25 cm) 3" (8 cm)

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

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

voltage per nameplate. Always choose a neutral (W) to establish a good neutral

connection when checking high voltages. If the display is in alarm, see "III.D. Alarm

Safeties."

IMPORTANT

The maximum allowable voltage variation is ±10 percent of the nameplate rating.

115VAC is used as a reference voltage when checking voltage to components.

Voltage may vary depending on power supply.

1. Factory Default Settings:

a) Temperature Setpoint:

Model Auxiliary Code Temperature Setpoint

Refrigerator All 38°F (3°C)

Freezer All -2°F (-19°C)

b) Temperature Display Scale: °F.

For further details, see "II.C. Control Module Check" or "III. Controls and Adjustments."

• There is a minimum 2-min. Comp on time and 2-min. Comp off time.

1) Unplug the appliance from the electrical outlet.

2) Remove the front panel.

3) Plug the appliance back into the electrical outlet.

4) Conrm 115VAC at CM 2 (L) (BK) to neutral (W).

1. Refrigerator

5) Startup/Cool Down–MH, PH, and TXVH energize. There is a slight delay, Comp,

ConFM, and EvapFM energize. On PT2A and R_2A, MH and BH also energize. Cabinet

temperature appears on display and 2-hr. defrost timer starts. Note: If DTh is above

50°F (10°C) EvapFM is de-energized.

a) MH Diagnosis: MH energizes at startup (except PT2A). If 115VAC is present,

check amp draw of MH. If an amp reading is not present, check the continuity of

MH. If defective, replace MH. Note: MH energizes and de-energizes with Comp and

CondFM on PT2A and R_2A models.

b) BH Diagnosis: BH energizes at startup on R_1A and with Comp on R_2A.

If 115VAC is present, check amp draw of BH. If an amp reading is not present, check

the continuity of BH. If defective, replace BH. Note: BH energizes and de-energizes

with Comp and CondFM on R_2A models.

c) TXVH (if applicable) Diagnosis: Conrm amp draw of TXVH. If no amp draw

available, check for 115VAC at TXVH grey wire (GY) to neutral (W). If 115VAC is

not present, check wiring connections to TXVH. If 115VAC is present, check TXVH

continuity. If open, replace TXVH.

d) EvapFMDiagnosis: Conrm that EvapFM(s) energize. If not, conrm DTh is at

50°F (10°C) or lower, doors are closed and DS engaged, check DS continuity.

If DTh is above 50°F (10°C), wait for evaporator to cool down. If DS is engaged and

contacts are open, replace DS. If DS is engaged and contacts are closed, check for

115VAC at CM 5 (F) dark blue (DBU) wire to neutral white (W) wire. If 115VAC is not

present, replace CM. If 115VAC is present, check EvapFM blades for binding and

EvapFM continuity.

e) Solid Door Cabinet Light Diagnosis: LED(s) are activated from door switch.

Open the door (upper on HS/HG), conrm LED(s) energizes. If not, with door open,

check for 5 to 12VDC at CM S4 brown (BR) to CM S4 blue (BU). If 5 to 12VDC

is not present at CM S4 brown (BR) to CM S4 blue (BU), conrm 115VAC power

supply to CM at terminals 2 (L) black (BK) to 3 (N) white (W). If 115VAC is present,

and LED(s) are off, check DS continuity. If DS is disengaged (open) and contacts

are closed, replace DS. IfDS is disengaged (open) and contacts are open, check

for 115VAC from CM 6 (LED) (Y) to a neutral (W). If 115VAC is not present, replace

CM. If 115VAC is present at CM 6 (LED) (Y) to a neutral (W) and LED(s) are not

on, check for 24VDC at DCD black (BK) wire to DCD red (R) wire. If 24VDC is not

present, check continuity of DCD driver. If open, replace DCD driver. If 24VDC is

present and LED(s) are not on, check wiring harness and wiring connections from

DCD to LED(s). Ifconnections are good and LED(s) are not on, replace LED(s).

f) Glass Door Cabinet Light Diagnosis: LED(s) are activated from control module

light switch. Glass door models feature lights that are controlled by the Standby/Light

control button located on the control module. Press the standby/light button quickly

to turn the light on or off. If LED(s) fail to turn on, check for 115VAC from CM 6 (LED)

(Y) to a neutral (W). If 115VAC is not present at CM 6 (LED) (Y)to a neutral (W),

replace CM. If 115VAC is present at CM 6 (LED) (Y) to a neutral (W) and LED(s) are

not on, check for 24VDC at DCD black (BK) wire to DCD red (R) wire. If 24VDC is

not present, check continuity of DCD driver. If open, replace DCD driver. If 24VDC is

present and LED(s) are not on, check wiring harness and wiring connections from

DCD to LED(s). Ifconnections are good and LED(s) are not on, replace LED(s).

g) CM Diagnosis: Cabinet temperature appears on display. If not, check for 115VACat

CM 2 (L) (BK) to CM 3 (N) (W). If 115VAC is not present, check power cord

connections and breaker/fuse. Conrm wiring connections are secure for both

CM 2 (L) (BK) (power supply) and CM 3 (N) (W). If 115VAC is present and display is

off, replace CM.

h) Comp and ConFM Diagnosis: Conrm Comp and ConFM energize. Ifnot, check

for 115VAC at CM 1 (C) (V) to a neutral(W). If 115VAC is not present, check CTh

status. See "II.D. Thermistor Check." IfCTh ohm reading is in proper range, replace

CM. If not in range, replace thermistor. If115VAC is present at CM 1 (C) (V) to a

neutral (W), check for 115VAC at both HPS (V) wires to a neutral(W). If 115VAC

is present on one and not the other, check HPS continuity. If open, allow time for

HPS to reset. If HPS does not reset, see "i) HPS Activation" below. If HPS is closed

and 115VAC present on both HPS (V) wires to a neutral (W), check for 115VAC at

condensing unit receptacle and condensing unit power supply cord (BK) to a neutral

(W). If 115VAC is not present at condensing unit receptacle or power supply cord

(BK), correct loose wiring or replace receptacle or power supply cord. If 115VAC is

present at condensing unit power supply cord (BK) and ConFM is energized but

Comp is not, check for 115VAC at both Comp external protector wires to a neutral

(W). If 115VAC is present on one and not the other, external protector is open.

Give external protector time to cool and reset. If Comp external protector does not

reset, replace Comp external protector. If 115VAC is present on both Comp external

protector wires, check Comp start capacitor, start relay, and Comp motor windings,

replace as needed. If Comp does not start, replace condensing unit. If ConFM is not

energized, check ConFM fan blades for binding and motor winding continuity.

If Comp and ConFM are energized and the cabinet does not cool down, check for a

restriction in the refrigeration circuit, correct TXV operation, and correct refrigerant

charge. See nameplate for correct charge amount.

i) HPS Activation: Conrm ConFM is energized and fan blade turns freely.

Conrmcondenser coil is not clogged or restricted. Conrm there are no restrictions

in the refrigeration circuit (TXV and drier). 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.

6) Cool Down Achieved–MH and BH continues (de-energizes on PT2A and R_2A

models). CTh cools to 3°F (1.7°C) below setpoint. Comp icon turns off and Comp and

ConFM de-energize. EvapFM icon stays on and EvapFM continues. 60-sec. later,

EvapFM icon turns off and EvapFM de-energizes.

a) Diagnosis: Conrm Comp icon turns off and Comp, ConFM, and MH (PT2A and

R_2A models) de-energize. Ifnot, and Comp and ConFM were energized longer

than 2 min., check CTh status. See "II.D. Thermistor Check."

b) CM, Comp, ConFM, MH (PT2A and R_2A models), and EvapFM Diagnosis:

IfCTh ohm reading is in proper range and Comp, CondFM, and MH continue,

check for 115VAC at CM 1 (C) (V) to neutral (W). If115VAC is present at CM 1 (C)

(V), replace CM. 1-min. after Comp icon turns off, conrm EvapFM icon turns off and

EvapFM de-energizes. If not, check for 115VAC at CM 5 (F) (DBU) to neutral (W).

If 115VAC is present, replace CM.

7) Defrost– The defrost icon turns on and "dEF" is displayed during defrost. There is a

5-min. minimum defrost time, a 1-hr. maximum defrost time, and a 2-hr. defrost interval.

If DTh above 50°F (10°C) at time of defrost, 2-hr. cumulative Comp run and 2-hr.

continuous Comp run defrost timers reset and defrost is skipped.

1a) Time-Initiated: 2-hr. cumulative Comp run or 2-hr continuous Comp run defrost

timer terminates (Comp energized more than 2 hrs.). Defrost icon turns on and

"dEF" is displayed. Comp icon turns off. Comp, ConFM, and MH (PT2A and R_2A

models) de-energize. EvapFM icon stays on and EvapFM continues.

1b) Manually-Initiated: To initiate a manual defrost, press the manual defrost button on

the display. Defrost icon turns on and "dEF" is displayed. If on, Comp icon turns off.

Comp, ConFM, and MH (PT2A and R_2A models) de-energize. EvapFM icon stays

on and EvapFM continues.

2) Defrost Termination:

(1) DTh warms to 44°F (6.6°C). If not, conrm DTh status. See "II.D. Thermistor

Check." If DTh is in proper range, Comp icon turns on. Comp, ConFM, and

MH (PT2A and R_2A models) energize. Defrost icon, EvapFM icon, and "dEF"

continues. EvapFM remains energized.

(2) 15-min. temperature display delay timer terminates. Cabinet temperature

replaces "dEF" on CM display.

Defrost Diagnosis:

1) Time-Initiation or Manual Initiation: Time-Initiation; 2-hr. cumulative compressor

run or 2-hr continuous compressor run defrost timer terminates. Note; EvapFM

remains energized during defrost.

Manual Initiation; CM defrost button pressed.

Note: There is 5-min. minimum defrost time and a 1-hr. maximum defrost time.

(1) CM, Comp, and CondFM Diagnosis: Conrm defrost icon turns on, "dEF" is

displayed, and Comp icon turns off. If not, replaceCM. Next, check that CM 1 (C)

(V) does not have 115VAC to neutral (W). If 115VAC is present, replaceCM.

(2) EvapFM Diagnosis: Conrm EvapFM icon is on. If not, conrm DTh is below

50°F (10°C). Next, check for 115VAC at CM 5 (F) (DBU) to neutral (W). If 115VAC

is not present, replace CM.

2) Defrost Termination: DTh warms to 44°F (6.6°C). If not, conrm DTh status.

See "II.D. Thermistor Check." If DTh is in proper range, Comp icon turns on and

Comp, ConFM, and MH (PT2A and R_2A models) energize. 15-min. temperature

display timer starts. Once 15-min. temperature display timer terminates, "dEF" is

replaced by cabinet temperature on display.

(1) Comp energized: DTh warms to 44°F (6.6°C), conrm Comp icon turns on and

Comp and ConFM energize. If not, conrm cabinet temperature is warm enough

for Comp operation. Next, check for 115VAC at CM1 (C) (V) to neutral(W).

If115VAC is not present, check CTh status. See "II.D. Thermistor Check."

If CTh ohm reading is in proper range, Comp icon is on, and 115VAC is not

present at CM 1 (C) (V), replace CM. If 115VAC is present, check for 115VAC at

CUR (V). If 115VAC is present at CM1 (C) (V) to neutral (W) and not at CUR (V),

check HPS continuity. See "1.5)h) HPS Activation" above. If HPS is closed and

115VAC present, check for 115VAC at condensing unit power supply cord (BK) to

neutral (W).If 115VAC is not present at condensing unit power supply cord (BK),

replace condensing unit power supply cord. If 115VAC is present at condensing

unit power supply cord (BK) and ConFM is energized but Comp is not, check

for 115VAC at Comp external protector to neutral (W). If 115VAC is not present,

give time for external protector to cool and reset. If Comp external protector does

not reset, replace Comp external protector. If 115VAC is present on both Comp

external protector wires, check run capacitor, start capacitor, start relay, and

Comp motor windings. If ConFM is not energized, check ConFM fan blades for

binding and motor winding continuity. If Comp does not start, replace condensing

unit.

(2) 15-min. temperature display delay timer terminates: 15 min. after Comp

icon turns on and Comp and ConFM energize, "dEF" is replaced by cabinet

temperature on display. If not, replace CM.

Legend: BH–bottom heater; CL–cabinet light; CM–control module; Comp–compressor;

ConFM–condenser fan motor; CTh–cabinet thermistor; DCD–direct current driver;

DS–door switch; DTh–defrost thermistor; EvapFM–evaporator fan motors;

HPS–high-pressure switch; MH–mullion heater; TXV–thermostatic expansion

valve; TXVH–thermostatic expansion valve heater; CUR–condensing unit

receptacle

2. Freezer

5) Startup/Cool Down– MH, PH, DrH, and TXVH energize. There is a slight delay, then

Comp, ConFM, and EvapFM energize. Cabinet temperature appears on display and

5-hr.Comp cumulative run time defrost timer starts.

a) MH and PH Diagnosis: PH and MH energize at startup. If 115VAC is present, check

amp draw of PH and/or MH. If an amp reading is not present, check the continuity of

PH and MH. If defective, replace PH or MH.

b) DrH Diagnosis: Conrm amp draw of DrH. If no amp draw available, check for

115VAC at DrH black wire (BK) to neutral (W). If 115VAC is not present, check wiring

connections to DrH. If 115VAC is present, check DrH continuity. If open, replace DrH.

c) TXVH Diagnosis: Conrm amp draw of TXVH. If no amp draw available, check

for 115VAC at TXVH grey wire (GY) to neutral (W). If 115VAC is not present, check

wiring connections to TXVH. If 115VAC is present, check TXVH continuity. If open,

replace TXVH.

d) Cabinet Light Diagnosis: Open the door (upper on HS/HG), conrm CL energizes.

If not check for 115VAC at CM 2 (L) (BK) to neutral (W) and CM 6 (Y) (LED) to

neutral (W). If 115VAC is not present at CM 2 (L) (BK), conrm power supply. If

115VAC is present at CM 2 (L) (BK), check DS continuity. If DS is disengaged and

contacts are closed, replace DS. IfDS is de-energized, and 115VAC is not present

at CM 6 (Y) (LED)to neutral (W), replace CM. If DS is de-energized and 115VAC is

present at CM 6 (Y) (LED) to neutral (W) and LEDs are not on, check for 24VDC at

DCD black (BK) 24VDC wire to DCD red (R) 24VDC wire. If 24VDC is not present,

check continuity of DCD driver. If open, replace DCD driver. If 24VDC is present and

LEDs are not on, check wiring harness and wiring connections from DCD to LED.

Ifconnections are good and LEDs are not on, replace LEDs.

e) CM Diagnosis: Cabinet temperature appears on display. If not, check for 115VACat

CM 2 (L) (BK) to CM 3 (N) neutral (W). If 115VAC is not present, check power cord

connections and breaker/fuse. Conrm wiring connections are secure for both

CM 2 (L) (BK) (power supply) and CM3 (N)(W) (neutral). If 115VAC is present and

display is off, replace CM.

f) Comp and ConFM Diagnosis: Conrm Comp and ConFM energize. Ifnot, check

for 115VAC at CM 1 (C) (V) to neutral(W). If 115VAC is not present, check CTh

status. See "II.D. Thermistor Check." IfCTh ohm reading is in proper range, and

115VAC is not present at CM 1 (C) (V) to neutral(W), replace CM. If thermistor ohm

reading is not in range, replace thermistor. If115VAC is present at CM 1 (C) (V) to

neutral (W), check for 115VAC at CUR (V) to neutral(W). If 115VAC is not present,

check continuity of HPS. If open, allow time for HPS to reset. If HPS does not reset,

see "h) HPS Activation" below. If HPS is closed and 115VAC present, check for

115VAC at condensing unit power supply cord (BK) to neutral (W).If 115VAC is not

present at condensing unit power supply cord (BK), replace condensing unit power

supply cord. If 115VAC is present at condensing unit power supply cord (BK) and

ConFM is energized but Comp is not, check for 115VAC at Comp external protector

to neutral (W). If 115VAC is not present, give time for external protector to cool and

reset. If Comp external protector does not reset, replace Comp external protector.

If 115VAC is present on both Comp external protector wires, check run capacitor

(2-Section), start capacitor, start relay, and Comp motor windings. If Comp does not

start, replace condensing unit. If ConFM is not energized, check ConFM fan blades

for binding and motor winding continuity.

If Comp and ConFM are energized and the cabinet does not cool down, check for a

restriction in the refrigeration circuit, correct TXV operation, and correct refrigerant

charge. See nameplate for correct charge amount.

g) EvapFM Diagnosis: Conrm that EvapFM(s) energizes 30-sec. after startup.

If not, conrm DTh is above 32°F (0°C). If above 32°F (0°C), wait for evaporator to

cool down. Next, conrm doors are closed and DS engaged, check DS continuity.

IfDS is engaged and contacts are open, replace DS. If DS is engaged and contacts

are closed, check for 115VAC at CM 5 (F) dark blue (DBU) wire to neutral white (W)

wire. If 115VAC is not present, replace CM. If 115VAC is present, check EvapFM

blades for binding and EvapFM continuity.

h) HPS Activation: Conrm ConFM is energized and fan blade turns freely.

Conrmcondenser coil is not clogged or restricted. Conrm there are no restrictions

in the refrigeration circuit (TXV and drier). 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.

6) Cool Down Achieved–PH, MH, and DrH continue. CTh cools to 3°F (1.7°C) below

setpoint. Comp icon turns off and Comp and ConFM de-energize. EvapFM icon

stays on and EvapFM continues. 60-sec. later, EvapFM icon turns off and EvapFM

de-energizes.

a) Diagnosis: Conrm Comp icon turns off and Comp and ConFM de-energize. Ifnot,

and Comp and ConFM were energized longer than 2 min., check CTh status.

See"II.D. Thermistor Check." Replace as needed.

b) CM, Comp, ConFM, and EvapFM Diagnosis: IfCTh ohm reading is in proper

range and Comp continues, check for 115VAC at CM 1 (C) (V) to neutral (W).

If115VAC is present at CM 1 (C) (V), replace CM. 1-min. after Comp icon turns off,

conrm EvapFM icon turns off and EvapFM de-energizes. If not, check for 115VAC

at CM 5 (F) (DBU) to neutral (W). If 115VAC is present, replace CM.

7) Defrost–The defrost icon turns on and "dEF" is displayed during defrost. There is a

5-min. minimum defrost time and a 1-hr.maximum defrost time, and a 5-hr. defrost

interval.

1a) Time-Initiated: 5-hr. cumulative Comp run or 4-hr. continuous Comp run defrost

timer terminates (Comp energized more than 5hrs.). Defrost icon turns on and

"dEF" is displayed. DHenergizes. Comp and EvapFM icons turn off. Comp, ConFM,

and EvapFM de-energize.

1b) Manually-Initiated: To initiate a manual defrost, press the manual defrost button on

the display. Defrost icon turns on and "dEF" is displayed. DH energizes. If on, Comp

and EvapFM icons turn off. Comp, ConFM, and EvapFM de-energize.

2) Defrost-Termination:

(1) DTh warms to 77°F (25°C). If not, conrm DTh status. See "II.D. Thermistor

Check." If DTh is in proper range. DH de-energizes. 3 min. Comp delay timer

starts. Defrost icon and "dEF" continues.

(2) 3 min. Comp delay timer terminates. Comp icon turns on. Comp and ConFM

energize. 4-min. EvapFM delay timer starts. Defrost icon and "dEF" continue.

(3) 4-min. EvapFM delay timer terminates or the defrost thermistor cools to 15°F

(-9°C), EvapFM icon turns on and EvapFM energizes. 15-min. temperature

display delay timer starts. Defrost icon turns off, "dEF" continues. Note that

the 4-min. EvapFM delay time is a maximum; if the defrost thermistor cools to

15°F(-9°C) before the 4-min. EvapFM delay timer terminates, EvapFM icon

turns on and EvapFM energizes. Also, when the cabinet temperature is above

50°F (10°C), EvapFM delays energizing until the cabinet temperature is below

50°F (10°C).

(4) 15-min. temperature display delay timer terminates. Cabinet temperature

replaces "dEF" on CM display.

Note: Pressing the defrost button on the display terminates defrost. If the cabinet

temperature is above setpoint, Comp icon and EvapFM icon turns on and Comp,

CondFM, and EvapFM energize.

Defrost Diagnosis:

1) Time-Initiation or Manual Initiation: Time-Initiation; 5-hr. Comp cumulative run or

4-hr. continuous run defrost timer terminates. Manual Initiation: CM defrost button

pressed.

Note: There is 5-min. minimum defrost time and a 1-hr. maximum defrost time.

(1) CM, Comp, CondFM, and EvapFM Diagnosis: Conrm defrost icon turns on,

"dEF" is displayed, and Comp and EvapFM icons turn off. If not, replaceCM.

Next, check that CM 1 (C) (V) and CM 5 (F) (DBU) do not have 115VAC to

neutral (W). If 115VAC is present, replaceCM.

(2) DH Diagnosis: Conrm DH energizes (amp draw). If not, check for 115VAC at

CM 4 (H) (R) to neutral (W). If 115VAC is not present and defrost icon is on,

replace CM. Next, check for 115VAC at DT (BK) to neutral (W). If 115VAC is not

present on both DT black (BK) wires, check DT continuity. If open, let cool and

reset. If DT does not close, replace DT. If DT is closed, check DH amp draw and

continuity.

2) Defrost-Termination: DTh warms to 77°F (25°C). Ifnot, conrm DTh status.

See"II.D. Thermistor Check." IfDTh is in proper range, DHde-energizes and 3-min.

Comp delay timer starts. If DTh has not warmed to 77°F (25°C), check DT and DH

continuity. Next, check DH amp draw. Once 3-min. Comp delay timer terminates,

Comp icon turns on and Comp and ConFM energize. 4-min. EvapFM delay timer

starts. Once 4-min. EvapFM delay timer terminates, defrost icon turns off, EvapFM

icon turns on and EvapFM energizes. 15-min. temperature display timer starts.

Once 15-min. temperature display timer terminates, "dEF" is replaced by cabinet

temperature on display.

(1) 3-min. Comp delay timer terminates: 3 min. after DH de-energizes, conrm

Comp icon turns on and Comp and ConFM energize. If not, conrm cabinet

temperature is warm enough for Comp operation. Next, check for 115VAC at

CM1 (C) (V) to neutral(W). If115VAC is not present, check CTh status.

See "II.D. Thermistor Check." If CTh ohm reading is in proper range, Comp icon

is on, and 115VAC is not present at CM 1 (C) (V) to neutral (W), replace CM.

If 115VAC is present, check for 115VAC at CUR (V) to neutral (W). If 115VAC is

present at CM1 (C) (V) to neutral (W) and not at CUR (V), check HPS continuity.

See "2.5)h) HPS Activation" above. If HPS is closed and 115VAC present, check

for 115VAC at condensing unit power supply cord (BK) to neutral (W).If 115VAC

is not present at condensing unit power supply cord (BK), replace condensing

unit power supply cord. If 115VAC is present at condensing unit power supply

cord (BK) and ConFM is energized but Comp is not, check for 115VAC at Comp

external protector to neutral (W). If 115VAC is not present, give time for external

protector to cool and reset. If Comp external protector does not reset, replace

Comp external protector. If 115VAC is present on both Comp external protector

wires, check run capacitor (Freezer 2-Section), start capacitor, start relay, and

Comp motor windings. If ConFM is not energized, check ConFM fan blades for

binding and motor winding continuity. If Comp does not start, replace condensing

unit.

(2) 4-min. EvapFM delay timer terminates:

Note: The 4-min. EvapFM delay time is a maximum; if the defrost thermistor

cools to 15°F (-9°C) before the 4-min. EvapFM delay timer terminates, EvapFM

icon turns on and EvapFM energizes. If 15°F (-9°C) is achieved at the defrost

thermistor or the 4min. EvapFM delay timer terminates, conrm EvapFM

icon turns on and EvapFM energizes. Ifnot, conrm doors are closed and DS

engaged, check DS continuity. If DS is engaged and contacts are open, replace

DS. If DS is engaged and contacts are closed, check for 115VAC at CM 5 (F)

(DBU) to neutral (W). If 115VAC is not present, replace CM. If 115VAC is present,

check EvapFM blades for binding and EvapFM continuity.

(3) 15-min. temperature display delay timer terminates: 15 min. after EvapFM

icon turns on and EvapFM energizes, "dEF" is replaced by cabinet temperature

on display. If not, replace CM.

Legend: CL–cabinet light; CM–control module; Comp–compressor; ConFM–condenser

fan motor; CTh–cabinet thermistor; DCD–direct current driver; DH–defrost heater;

DrH–drain heater; DT–defrost thermostat; DTh–defrost thermistor;

EvapFM–evaporator fan motors; HPS–high-pressure switch; MH–mullion heater;

PH–perimeter heater; TXV–thermostatic expansion valve; TXVH–thermostatic

expansion valve heater; CUR–condensing unit receptacle

C. Control Module Check

1. Control Module Display

Before replacing CM that does not show a visible defect and that you suspect is

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

diagnosis. Always choose a neutral (W) to establish a good neutral connection when

checking high voltages. Also, conrm there is a good power supply and neutral

connection to CM: 115VAC at CM 2 (L) (BK) to CM 3 (N) (W).

Alarm Reset: To silence the alarm, press and release the up button with power on.

Foralarm information, see "III.D. Alarm Safeties."

2. Startup/Cool Down

1) Check all wiring connections. Conrm the CTh, DTh, and DS are properly connected.

2) Check for 115VAC at CM 2 (L) (BK) to CM 3 (N) neutral (W). If 115VAC is not present,

check power supply and wire connections.

3) Check that cabinet temperature is displayed. If not, replace CM.

4) Check that Comp and ConFM energize. If not, check CTh status. See "II.D. Thermistor

Check." If CTh ohm reading is in proper range, check for 115VAC at CM 1 (C) (V) to

neutral (W). If 115VAC is not present, replace CM.

5) Check that EvapFM energizes (30-sec. delay on freezers). If not, check for 115VAC

CM 5 (F) (DBU) to neutral (W). If 115VAC is not present, make sure DTh is at or below

50°F (10°C). Next, conrm doors are closed and DS engaged. If 115VAC is not present,

replace CM.

3. Defrost Initiation

6) Manual Defrost Check:

Refrigerator: Press and release the manual defrost button. Defrosticon turns on

and "dEF" is displayed. If energized, Comp icon turns off. EvapFM icon stays on and

EvapFM continues.

Freezers: Press and release the manual defrost button. Defrosticon turns on and "dEF"

is displayed. DH energizes. If energized, Comp and EvapFM icons turn off. Comp,

ConFM, and EvapFM de-energize.

7) Conrm Comp, ConFM, and EvapFM (freezers) de-energize. Check for 115VAC at

CM1 (C) (V) to neutral (W) for Comp and ConFM. For freezers, check for 115VAC at

CM 5 (F) (DBU) to neutral (W) for EvapFM. If"dEF" is displayed and 115VAC is present,

replace CM.

8) Freezers: Conrm DH energizes. Check for 115VAC at CM 4 (H) (R) to neutral (W).

If"dEF" is displayed and 115VAC is not present, replace CM.

4. Defrost Termination

9) Check that the components restart after defrost termination.

Refrigerator: DTh reaches 44°F (6.6°C). EvapFM icon stays on and EvapFM continues.

Comp and ConFM energize. If not, check DTh status. See "II.D. Thermistor Check."

If DTh ohm reading is in proper range, and components do not energize, check for

115VAC at CM 1 (C) (V) to neutral (W). If 115VAC is not present, replace CM. If115VAC is

present, check component continuity and replace as needed.

Freezer: DTh reaches 77°F (25°C). DH de-energizes. "dEF" continues on display.

3-min. later, Comp icon turns on and Comp and ConFM energize. EvapFM icon turns

on and EvapFM energizes once DTh reaches 15°F (-9°C) or 4-min. EvapFM delay timer

terminates. If not, check DTh status. See "II.D. Thermistor Check." IfDTh ohm reading

is in proper range, and Comp and ConFM, or EvapFM does not energize, replaceCM.

15min. after EvapFM energizes, cabinet temperature appears on CM. Ifcomponents fail

to start, check continuity, replace as needed.

Legend: CM–control module; Comp–compressor; ConFM–condenser fan motor;

CTh–cabinet thermistor; DH–defrost heater; DS–door switch; DTh–defrost

thermistor; EvapFM–evaporator fan motors, MH–mullion heater; PH–perimeter

heater

D. Thermistor Check

The cabinet thermistor is used for cabinet temperature control and the defrost thermistor

is used for defrost cycle termination and evaporator fan motor control.

• Refrigerator: Defrost termination is 44°F (6.6°C).

• Freezer: Defrost termination is 77°F (25°C).

• Freezer: Evaporator fan motor initiation after defrost is 15°F(-9°C) or

4-min. Evaporator fan motor delay timer terminates.

• Evaporator fan motor high-temperature control:

Refrigerator: Defrost thermistor at or higher than 50°F (10°C).

Freezer: Defrost thermistor at or higher than 32°F (0°C).

Thermistor resistance varies depending on temperature. The control module monitors the

thermistors to control system operation. No adjustment is required.

To check thermistor resistance, follow the steps below.

1) Unplug the appliance.

2) Remove the front panel, control panel, top louver, and evaporator cover.

3) Remove the thermistor in question, then immerse the thermistor sensor portion in a

glass containing ice and water for 2 to 3 min.

4) Disconnect the thermistor connector from the control module.

5) Check the resistance between the wires at the thermistor connector. Normal reading is

within 16.0 to 16.7 kΩ. If outside the normal reading, replace the thermistor.

6) Reconnect and replace the thermistor in its correct position.

7) Replace the evaporator cover, top louver, control panel, and front panel in their correct

positions.

8) Plug the appliance back in.

E. Diagnostic Tables

Check for correct appliance installation per the instruction manual and proper voltage per

appliance nameplate.

1. Not Cooling

Not Cooling - Possible Cause

Power Supply

Unplugged, off, blown fuse, tripped or defective circuit breaker.

Loose connection.

Not within specications.

Cord and Plug

On three-section model, check

receptacle box cord and plug and

one-section and two-section cords

and plugs.

Loose connection.

Defective.

Wiring

Loose connection.

Faulty.

Control Module

See "III.D. Alarm Safeties" and "II.C.

Control Module Check."

In alarm.

Defective.

Door Switch

Not engaged.

Defective.

Evaporator Fan Motor

Defective.

High-Pressure Switch

Dirty condenser.

Ambient temperature too warm.

Condenser fan motor not operating.

Refrigerant overcharge.

Refrigerant lines or components restricted.

Defective.

Compressor External Protector

Dirty condenser.

Condenser fan motor not operating.

Compressor capacitor or start relay defective.

Defective.

Compressor

Defective.

10.

Condenser

Dirty.

11.

Evaporator

See "2. Evaporator Frozen Up."

Clogged or frozen.

12.

Refrigerant/Refrigerant Lines

Refrigerant leak.

Refrigerant lines restricted.

2. Evaporator Frozen Up

Evaporator Frozen Up - Possible Cause

Evaporator

Dirty.

Evaporator Fan Motor

Fan blades binding.

Defective.

Defrost Thermistor

Out of position or defective.

Control Module

Defective.

Refrigerant Charge/Refrigerant

Lines

Low.

Component restriction (TXV, cap tube, drier).

Defrost Heater (freezer)

Defective.

3. Defrost

Refrigerator Defrost Fails to Initiate - Possible Cause

1. Control Module

(2-hr cumulative compressor run

or 2-hr continuous compressor run

defrost timer)

a) Defective.

Refrigerator Defrost Fails to Terminate - Possible Cause

1. Defrost Thermistor (Conrm DTh

status. See "II.D. Thermistor Check.")

a) Defrost termination temperature 44°F (6.6°C) not achieved.

b) Defective.

2. Control Module a) Defrost thermistor connection loose.

b) Defective.

Freezer Defrost Fails to Initiate - Possible Cause

5-hr. cumulative Comp run or

4-hr. continuous run defrost timer

terminated

Check compressor operation. See "1. Not Cooling."

Control Module

Defective.

Defrost Thermostat

Open. Cut-out: 120°F±5°F (49°C±3°C), Cut-in: 70°F±5°F

(21C±3°C)

Freezer Defrost Fails to Terminate - Possible Cause

Defrost Heater

Defrost thermostat open.

Defective.

Defrost Thermistor (Conrm DTh

status. See "II.D. Thermistor Check.")

Defrost termination temperature 77°F (25°C) not achieved.

Defrost thermistor connection loose.

Control Module

Defective.

III. Controls and Adjustments

A. Control Module

All models are pretested and factory set. When plugged into an electrical power supply,

there is a slight delay, then the current cabinet temperature is displayed. From the

display module, the cabinet setpoint and temperature display scale can be changed.

Note: When exposed to high temperatures, a high-temperature alarm "Hi" may occur at

start-up. To silence the alarm, press and release the upper button. Alarm clears

once temperature is within factory parameters. For details, see"III.D.Alarm

Safeties."

NOTICE

• The control module is fragile, handle very carefully.

• Do not change wiring and connections. Never misconnect terminals.

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

1. Display Icons

Control Module Icons

Icon Meaning

Compressor

Compressor running.

Defrost

Appliance is in defrost cycle. See "II.B. Service Diagnosis" for details.

Evaporator Fan Motor

Evaporator fan motor is running. Evaporator fan motor de-energizes when door is open.

Alarm

Appliance is in alarm. See "III.D. Alarm Safeties" for details.

ECO

°C

°F

Button

Down

Button

Control

Panel

Standby and Light

Control for Glass Door

Models Button

Manual

Defrost

Button

Compressor Icon

Defrost

Icon

Evaporator Fan

Motor Icon

Alarm

Icon

Front

Panel

5 VDC

115 VAC

Cabinet

Thermistor

Defrost

Thermistor

1 (C) Compressor (V)

2 (L) Power Supply (BK)

3 (N) Neutral (W)

5 (F) Evaporator Fan Motor (DBU)

4 (H) Defrost Heater (R)

(Freezer)

Defrost Thermistor

Cabinet Thermistor

Door Switch

Door

Switch

6 (LED) Cabinet Lights (Y)

2. Display Layout

3. Control Module Connections

B. Temperature

The temperature default scale is °F, but it can be changed to read °C. To change,

see "III.B.3. Changing the Temperature Display Scale (°F or °C)" below.

1. Default Settings

a) Temperature Setpoint:

Model Auxiliary Code Temperature Setpoint

Refrigerator All 38°F (3°C)

Freezer All -2°F (-19°C)

b) Temperature Display Scale: °F.

2. Temperature Setpoint

The temperature setpoint is the value for the average cabinet temperature. The

temperature differential for the compressor to turn on and off is ±3°F (±1.7°C) of the

temperature setpoint. For example, for a refrigerator temperature setpoint of 36°F (2°C),

the compressor comes on at 39°F (3.7°C), and the compressor goes off at 33°F (0.3°C).

If necessary, adjust the temperature setpoint as follows:

1) To change the temperature setpoint, press and release the up or down button.

The current temperature setpoint appears.

2) Press the up or down button until the desired value is displayed. After a few seconds,

the display returns to the current cabinet temperature and the temperature setpoint is

saved. NOTICE! Do not adjust the temperature setpoint more than 2°F (1°C) at a

time. Allow the temperature to stabilize for a minimum of 8hours before making

further temperature setpoint adjustments.

• For refrigerators, the temperature setpoint is adjustable between 31°F and 52°F

(-0.5°C and 11°C). The factory default is 38°F (3°C).

• For freezers, the temperature setpoint is adjustable between -10°F and +12°F (-24°C

and -11°C). The factory default is -2°F (-19°C).

3. Changing the Temperature Display Scale (°F or °C)

To change the temperature display scale, press and hold either the up or down button for

5 seconds. The factory default is °F.

C. Defrost

To initiate a manual defrost, press the manual defrost button briey. The defrost icon and

"dEF" appear on the display.

1. Refrigerators

Refrigerators use a time-initiated, off-cycle defrost. Defrost occurs when either the

2-hr.cumulative compressor run timer terminates or the 2-hr. continuous compressor

run timer terminates. When either the 2-hr.cumulative compressor run timer or the

2-hr. continuous compressor run timer terminates, defrost begins. The 5-min. minimum

defrost timer and the 1-hr. maximum defrost timer starts. If energized the compressor

de-energizes and the evaporator fan motor continues. Cabinettemperature is not

displayed during defrost; "dEF" is displayed in its place along with defrost icon. After

the 5-min. minimum defrost timer terminates and the defrost thermistor warms to 44°F

(6.6°C), defrost terminates. The defrost icon turns off and the compressor energizes.

"dEF" is displayed during defrost and continues for 15 min. after defrost termination.

Once the 15-min. "dEF" display timer terminates, cabinet temperature returns to the

display. Note: If the defrost thermistor is above 50°F (10°C) the evaporator fan motor

de-energizes until the defrost thermistor reaches 49°F (9°C).

2. Freezers

Freezers use a time-initiated, heated defrost. Defrost occurs when either the

5-hr.cumulative compressor run timer terminates or the 4-hrcontinuous compressor

run timer terminates. When either the 5 hr. cumulative compressor run timer or the

4-hrcontinuous run timer terminates, defrost begins. The 5-min. minimum defrost

timer and the 1-hr. maximum defrost timer starts. Cabinettemperature is not displayed

during defrost; "dEF" is displayed in its place along with the defrost icon. After the

5-min. minimum defrost timer terminates and the defrost thermistor warms to 77°F

(25°C), defrost terminates (defrost heater de-energizes). A 3-min. compressor delay

timer starts. Once the 3-min. compressor delay timer terminates, the compressor

energizes and a 4-min. evaporator fan motor delay timer (drip time) starts. Once the

4-min. evaporator fan motor delay timer (drip time) terminates, the evaporator fan

motor energizes, the defrost icon turns off, and the 15-min. temperature display delay

timer starts. Once the 15-min. temperature display delay timer terminates, cabinet

temperature is displayed. Note that the 4-min. evaporator fan motor delay time is a

maximum; if the defrost thermistor cools to 15°F (-9.5°C) before the 4-min. evaporator

fan motor delay timer terminates, the evaporator fan motor will energize. Freezers have

a minimum defrost interval of 5hours.

3. Manual Defrost

To initiate a manual defrost, press the manual defrost button.

D. Alarm Safeties

Alarm signals are designed to protect the appliance and food product. These alarms

give information or warnings in the event the appliance is operating out of acceptable

parameters. Should one of the alarms occur, follow the instructions in the table below to

address the alarm. The alarm code and alarm icon ash with audible alarm. Tosilence

the alarm, press and release the upper button.

Alarm Signals

Alarm Code Problem Corrective Action/Reset Details

dor

Door Switch Alarm: Door has remained

open for more than 2 minutes.

Door Switch has failed

If obvious corrections such as closing doors does not

correct the alarm, call a qualied service technician.

Beeps for 10 seconds, then silent for 50 seconds. To

silence the alarm, press and release the up button.

E01

Cabinet Thermistor Malfunction Alarm

Cabinet thermistor has failed.

Call a qualied service technician.

Beeps for 10 seconds, then silent for 50 seconds. To

silence the alarm, press and release the up button.

Appliance cycles 5 min. on, 5 min. off.

E02

Defrost Thermistor Malfunction Alarm

Defrost thermistor has failed.

Call a qualied service technician.

Beeps for 10 seconds, then silent for 50 seconds. To

silence the alarm, press and release the up button.

Appliance cycles on and off with cabinet thermistor.

High Temperature Alarm

Refrigerator: Cabinet temperature has

remained above 57°F (13.9°C) for more

than 2hours.

Freezer: Cabinet temperature has

remained above 26°F (-3.3°C) for more

than 2hours.

If obvious corrections such as closing doors and

cleaning the air lter and/or condenser do not bring

temperature back in range, call a qualied service

technician.

Beeps for 10 seconds, then silent for 50 seconds.

To silence the alarm and clear "Hi" from the display,

press and release the up button. The alarm icon

stays on.

Automatically resets when temperature returns to

normal.

Low Temperature Alarm

Refrigerator: Cabinet temperature has

remained below 26°F (-3.3°C) for more

than 2hours.

Freezer: Cabinet temperature has

remained below -23°F (-30.6°C) for more

than 2hours.

If obvious corrections do not bring the temperature

back in range, call a qualied service technician.

Beeps for 10 seconds, then silent for 50 seconds.

To silence the alarm and clear "Lo" from the display,

press and release the up button. The alarm icon

stays on.

Automatically resets when temperature returns to

normal.

E. Safety Devices and Light Control

1. Compressor External or Internal Protector

If combined temperature/amperage value is above the limit specied by the

compressor manufacturer, the compressor overload operates independently to turn

off the compressor. The compressor overload de-energizes the compressor until the

temperature/amperage value returns to an acceptable level.

2. Short-Cycle Protection

There is a 2-min. minimum off-time and on-time for the compressor.

Note: Time may vary with compressor protector or high-pressure switch activation.

3. High-Pressure Switch

If pressure on the high-side of the appliance exceeds Hoshizaki specications, the

high-pressure switch activates and interrupts the compressor circuit, de-energizing the

compressor until the pressure returns to an acceptable level.

If the condenser fan motor is operating and the compressor is off, it is most likely that the

compressor protector opened. If both the compressor and condenser fan motor are off, it

is most likely the appliance is off or the high-pressure switch has opened.

4. Light Control for Glass Door Models

Glass door models feature lights that are controlled by the standby/light control button

located on the control module. Press and release the standby/light button to turn the light

on or off.

F. Mullion/Perimeter Heater

Refrigerators are equipped with mullion heaters and the freezers are equipped with

mullion and perimeter heaters. The heaters are energized (except PT2A and R_2A

models) when the appliance is plugged into the electrical outlet. Mullion heater

energizes with compressor and condensor fan motor on PT2A and R_2A models.

IV. Refrigeration Circuit and Component Service Information

DANGER

Risk of Fire or Explosion Flammable Refrigerant Used

• Follow handling instructions carefully in compliance with U.S. government

regulations.

• Do not use mechanical devices to defrost.

• Do not puncture refrigerant tubing. Risk of re or explosion due to puncture of

refrigerant tubing; follow handling instructions carefully.

• Component parts shall be replaced with like components.

• Servicing shall be done by factory authorized service personnel to minimize the risk

of possible ignition due to incorrect parts or improper service.

• Consult instruction manual/service manual before attempting to install or service

this product.

• Dispose of properly in accordance with federal or local regulations.

• Do not place any potential ignition sources in or near the appliance.

Risque De Feu Ou D'Explosion Le Frigorigène Est Inammable

• Suivre attentivement les instructions de manipulation conformément à la

réglementation gouvernementale.

• Ne pas utiliser d'appareils mécaniques pour dégivrer le réfrigérateur.

• Ne pas perforer la tubulure contenant le frigorigène. Risque de feu ou d'explosion

si la tubulure contenant le frigorigène est perforée; suivre les instructions de

manutention avec soin.

• Les pièces des composants doivent être remplacées par des pièces et accessoires

équivalents.

• L’entretien doit être effectué par le personnel de service autorisé par le fabricant

an de minimiser les risques d’inammation attribuables à l’installation d’une pièce

inadéquate ou à la mauvaise exécution du service.

• Consulter le manuel du propriétaire/guide de réparation avant de tenter une

réparation. Toutes les mesures de sécurité doivent être respectées.

• Éliminer conformément aux règlements fédéraux ou locaux.

• Ne placez aucune source d’inammation potentielle dans ou près de l’appareil.

WARNING

• Wear appropriate personal protective equipment (PPE) when servicing the

appliance.

• Technician must utilize a combustible gas leak detector at all times.

• Notify everyone in the immediate area that you are working with ammable

refrigerant.

• Do not work on appliance in a conned space. Conrm area is well ventilated.

• Identify and eliminate all possible ignition points in a 10 ft. (3 m) area around service

area.

• Do not use mechanical devices to defrost.

• Use non-sparking tools.

• Class B dry chemical re extinguisher or equivalent must be available.

• Do not pressurize system above 200 PSIG during leak check procedure or prior to

evacuating refrigeration system.

• 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.

• To reduce the risk of electric shock, do not touch the plug with damp hands.

• Unplug the appliance from the electrical outlet before servicing.

• Make sure all food zones in the appliance are clean after the appliance is serviced.

A. Service for Refrigerant Lines

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-290 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 minutes when replacing or

servicing parts. The Polyol Ester (POE) oils used in R-290 appliances 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).

Refrigerant leaks must be repaired as soon as they are discovered. If not, refrigerant

charge should be recovered from the system until the leak can be repaired.

When repairing a leak:

• Repair the leak properly – Remove the refrigerant, examine the leak source, determine

the reason for the leak, and carry out the proper course of action.

• Before repairing the leak, ensure that the refrigerant has been recovered and the

system purged with nitrogen when brazing.

• Be sure to remove piercing valves attached to the system after repairs are made.

1. Refrigerant Recovery

Using proper refrigerant practices, place piercing valves toward the end (crimped area)

of the high and low-side process tubes, then recover the refrigerant into an approved

container or device.

2. Brazing

DANGER

Risk of Fire or Explosion Flammable Refrigerant Used

• Servicing shall be done by factory authorized service personnel to minimize the risk

of possible ignition due to incorrect parts or improper service.

Risque De Feu Ou D'Explosion Le Frigorigène Est Inammable

• L’entretien doit être effectué par le personnel de service autorisé par le fabricant

an de minimiser les risques d’inammation attribuables à l’installation d’une pièce

inadéquate ou à la mauvaise exécution du service.

WARNING

• Wear appropriate personal protective equipment (PPE) when servicing the

appliance.

• You must have a combustible gas leak detector in the immediate work area at all

times.

• You must have a Class B chemical re extinguisher available at all times.

• Notify all persons in the immediate area that you are working with a ammable

refrigerant.

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

• Be sure the area is clear of refrigerant vapor before brazing.

1) Purge with nitrogen for 2 min. WARNING! Purging with nitrogen gas assures all

refrigerant has been removed from the refrigeration circuit.

2) Braze/repair/replace damaged component or ttings while purging with nitrogen gas

owing at a pressure of 3 to 5 PSIG.

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).

3) Use soap bubbles to check for leaks. Raise the pressure using nitrogen gas (190 PSIG).

Do not use any refrigerant as a mixture with pressurized air for leak testing.

4) Once leak checking is complete, release the nitrogen gas from the system.

3. Evacuation

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

high and low-side refrigerant piercing 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, then open the gauge manifold 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 (500 microns). 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 nameplate. Hoshizaki

recommends only virgin or reclaimed refrigerant which meets ARI Standard 700 (latest

edition) be used.

4. Recharge

6) R-290 can be charged in either the liquid or vapor state. A liquid charge is preferred.

Service kit SP-5459 is recommended when recharging an R-290 refrigeration circuit.

Connect the refrigerant hose to the service cylinder and bleed air out of refrigerant

hose. Next, invert the service cylinder and place it on the scales. Zero out 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) Close the high-side valve on the gauge manifold. If charging is complete, skip to step 10.

9) 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 access valve with the compressor running. Close the refrigerant cylinder

valve and let the low-side refrigerant equalize to the system, then close the low-side

manifold gauge. Unplug the appliance from the electrical outlet.

10) Remove the refrigerant hose from the service cylinder. Pinch off (crimp down) the

process tubes just below the piercing valves.

11) Remove the piercing valves. Cut the process tubes to remove the piercing valve holes

then braze the process tubes closed. Note: Be sure there is no refrigerant leak or

refrigerant in the area before brazing.

12) Use a combustible gas leak detector or soap bubbles to check for leaks again.

13) Place red sleeves over the process tubes.

14) Plug the appliance back into the electrical outlet. Allow the appliance to cool to setpoint

before reloading.

B. Component Service Information

DANGER

• Component parts shall be replaced with like components.

• Les pièces des composants doivent être remplacées par des pièces et accessoires

équivalents.

NOTICE

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

operation.

Component Notes

Compressor Install a new start relay and compressor external protector. WARNING! To reduce the

risk of electric shock, be sure to reconnect the compressor's ground wire.

Thermostatic

Expansion Valve

• 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.

Defrost Thermis-

tor

After working with or around the defrost thermistor on a freezer, make sure the defrost

thermistor wire is not touching the defrost heater.

C. Door Reversal

The appliance is provided with a cabinet design which, after being delivered to the

installation location, permits changing of the door swing from left to right or right to left.

To change the door swing, See Instruction Manual "I.F. Door Reversal".

NOTICE! Improper installation may result in the doors not closing completely and/

or the gaskets not sealing correctly. For further details, contact your local Hoshizaki

distributor or Hoshizaki Technical Support at 1-800-233-1940.

V. Maintenance

WARNING

• Unplug the appliance before performing maintenance to prevent electric shock or

injury by moving parts. To reduce the risk of electric shock, do not touch the plug

with damp hands.

• Before performing maintenance, move all foods into another clean refrigerator or

freezer.

1. Air Filter

Check the air lter at least twice a month. When clogged, use warm water and a neutral

cleaner to wash the lter.

2. Condenser

Inspect the condenser air lter bi-weekly. Wash with warm water and neutral cleaner if

dirty. Check the condenser once a year and use a brush or vacuum cleaner to clean the

condenser as required.

3. Condensate Wick (Except DT1A-HS and Freezer on DT2A-FS)

The condensate wick must be cleaned at least once a year. More frequent cleaning may

be required in some conditions to maintain proper ow. Follow the steps below.

1) Unplug the appliance from the electrical outlet. WARNING! To reduce the risk of electric

shock, do not touch the plug with damp hands.

2) Remove the wick from the retainers.

3) Clean or replace the wick. NOTICE! If the wick is clogged/deteriorating replace.

4) Replace the wick in its correct position.

NOTICE! Be sure the wick is positioned into the condensate pan.

Fig. 1

Wick

Retainer

Wick

5) Plug the appliance back in.

4. Power Supply Connection

If the plug or power cord is damaged, contact your local Hoshizaki service representative

or local Hoshizaki distributor immediately and ask for repairs.

All other maintenance or service on this appliance should be performed in accordance

with the Hoshizaki Instruction Manual by a qualied service technician.

VI. Preparing the Appliance for Periods of Non-Use

WARNING

Prevent the doors from closing to reduce the risk of children getting trapped.

NOTICE

Clean the cabinet interior, door gaskets, and shelves.

1) Before shutting down the appliance, move the stored food into another refrigerator or

freezer.

2) Unplug the appliance. WARNING! To reduce the risk of electric shock, do not touch

the plug with damp hands.

VII. Disposal

DANGER

Risk of Fire or Explosion Flammable Refrigerant Used

• Follow handling instructions carefully in compliance with U.S. government

regulations.

• Do not puncture refrigerant tubing. Risk of re or explosion due to puncture of

refrigerant tubing; follow handling instructions carefully.

• Dispose of properly in accordance with federal or local regulations.

Risque De Feu Ou D'Explosion Le Frigorigène Est Inammable

• Suivre attentivement les instructions de manipulation conformément à la

réglementation gouvernementale.

• Ne pas perforer la tubulure contenant le frigorigène. Risque de feu ou d'explosion

si la tubulure contenant le frigorigène est perforée; suivre les instructions de

manutention avec soin.

• Éliminer conformément aux règlements fédéraux ou locaux.

WARNING

When preparing the appliance for disposal, remove the doors/drawers to reduce the

risk of children getting trapped. Leave any shelves in place so that children may not

easily climb inside.

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

A. Electrical and Refrigerant Data

Model

AC Supply

Voltage Amperes

Refrigerant

(oz.)

Design Pressure

(PSIG)

R290 HIGH LOW

R1A-FG/FGCL/FGCR//HG

R1A-FS/FSJ/FSL/FSLJ/HS/HSL

PT1A-FG-FG/FS-FS/HS-HS

115/60/1

5 4.6

360 190

R2A-FG/HG/FS/HS

4.9

PT2A-FS-FS/HS-HS/FG-FG 5.3

R3A-FS/HS

9.5

4.6 Right

4.6 Left

RN1A-FS

RT1A-FS-FS

6.4 4.6

RN2A-FS

RT2A-FS-FS

8.2 5.1

F1A-FG/FS/FSL/HG/HS/HSL 9 4.1

F2A-FG/HG/FS/HS 9.5 4.2

F3A-FS/HS 208-230/115/60/1 11

4.1 Right

4.1 Left

DT1A-HS 115/60/1

5.5

Freezer

2.5

Refrigerator

2.1

DT2A-FS/HS 115/60/1 14

Freezer

4.1

Refrigerator

4.6

See the nameplate for electrical and refrigerant data. The nameplate is located inside the

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

notice.

B. Wiring Diagrams

1. R1A/R2A/F1A-FG/FGCL/FGCR/FS/FSJ/FSL/FSLJ/HG/HS/HSL,

PT1A-FG-FG/FS-FS/HS-HS

5 to 12VDC

115 VAC

Glass Door LEDs Controlled Through

Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

2. RN1A-FS, RT1A-FS-FS

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

3. RN2A-FS, RT2A-FS-FS

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

5 to 12VDC

115 VAC

Glass Door LEDs Controlled Through

Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

4. PT2A-FG-FG/FS-FS/HS-HS

5. R3A-FG/FGCL/FGCR/FS/FSCL/FSCR/HS/HG

5 to 12VDC

115 VAC

Glass Door LEDs Controlled Through

Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

6. F2A-FG/FS/HG/HS

5 to 12VDC

115 VAC

Glass Door LEDs Controlled Through

Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

7. F3A-FS/HS

5 to 12VDC

115 VAC

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

8. DT1A-HS

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

9. DT2A-FS/HS

5 to 12VDC

115 VAC

Glass Door LEDs Controlled Through

Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

Main Connection

System Connection

* High-Pressure Switch

Cut-out 360±

PSIG

Cut-in 249±10 PSIG

Hoshizaki F1A-HS 27.5'' 23.1 cu. ft. Top Mounted 1 Section Solid Half Door Reach-In Freezer

Product's Documents

Service manual

Specifications

Hoshizaki F1A-HS Questions and Answers