Hoshizaki CR60A, CR49A, R2AHS, CR36A, R2AFG User Manual

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Service Manual

Steelheart Series Refrigerated Kitchen Equipment

Models Upright Series

hoshizakiamerica.com

Number: 73237 Issued: 2-25-2019 Revised: 5-8-2019

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: techsupport@hoshizaki.com

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 ............................................................................................................ 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,

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

2. F2A-FG/FS/HG/HS ............................................................................................... 44

3. PT2A-FG-FG/FS-FS/HS-HS ................................................................................. 45

4. R3A-FG/FGCL/FGCR/FS/FSCL/FSCR/HS/HG ..................................................... 46

5. F3A-FS/HS ............................................................................................................ 47

6. DT1A-HS ............................................................................................................... 48

7. DT2A-FS/HS .......................................................................................................... 49

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

WARNING

NOTICE

IMPORTANT

Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

Indicates a situation that, if not avoided, could result in damage to the appliance or property.

Indicates important information about the use and care of the appliance.

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.

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 factoryinstalled 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

• 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.

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.

• 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

Defrost Thermistor

Evaporator Fan

Condenser

Wick

Evaporator

Evaporator Cover

Cabinet Thermistor

Compressor

Power Cord Thermostatic Expansion Valve

Front Panel

Door Lock

Light

Door Switch

Control Module

Control Panel

Door

Door Gasket

Model Shown: R1A-FS

2. Glass Door Models

Condenser Fan Motor

Condenser

Wick

Evaporator Fan

Compressor

Defrost Thermistor

Evaporator

Evaporator Cover

Cabinet Thermistor

Thermostatic Expansion Valve

Power Cord

Front Panel

24VDC Driver Glass Door Models

Door Lock

Model Shown: R2A-FG

Control Module

Control Panel

LED Lights Glass Door Models

Door

Door Gasket

Model Shown: R2A-FG

B. Refrigeration Flow Chart

Condenser

High-Pressure Switch

Thermostatic Expansion Valve

Defrost Heater and Defrost Thermostat (freezer only)

Condenser Fan

Evaporator Fans (quantity depends on model)

Drier

Compressor

Defrost Thermistor

Evaporator

Cabinet Thermistor

Condensate Pan

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Charts

1. Refrigerator

DTh warms to

44°F (6.6°C) or

1-hr maximum

defrost timer

2-hr continuous compressor run

defrost timer terminates

terminates

Comp energized

ConFM energized

EvapFM energized

DTh in control

5-min.

minimum

defrost

5. Defrost Termination

2-hr cumulative compressor run or

4. Defrost

EvapFM energized

Comp de-energized

ConFM de-energized

CTh warms

to 3°F (1.7°C)

above setpoint

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

38°F (3°C)

2-min. Comp off

2. Cool Down Achieved

Refrigerator Sequence Flow Chart

timer starts

a) EvapFM de-energizes when door is opened on -FS models and when upper door is opened on -HS models.

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

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

d) 5-min. minimum defrost time.

e) 1-hr. maximum defrost time.

f) "dEF" displayed during defrost.

Comp de-energized

ConFM de-energized

EvapFM de-energized

(60-sec. delay

before de-energized)

Note:

CTh in control

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

3. Cool Down Restart

2-min. Comp on

timer starts

Comp energized

ConFM energized

EvapFM energized

1. Startup/Cool Down

Legend:

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DTh-defrost thermistor

EvapFM-evaporator fan motor

MH-mullion heater

Cycle Steps

Slight

Delay at

Startup

MH energized

Power on

2. Freezer

DTh warms to 77°F (25°C)

5. Defrost Termination

5-hr. cumulative Comp run or

4. Defrost

or 1-hr maximum defrost

4-hr. continuous run defrost

timer terminates

DTh in

control

5-min.

minimum

defrost

DH de-energized

DH energized

*After Drip Time Delay:

Comp de-energized

Comp energized

ConFM de-energized

ConFM energized

EvapFM de-energized

EvapFM energized

*(Once DTh reaches 15°F (-9°C)

or 4-min. EvapFM terminates,

whichever comes rst)

CTh warms

to 3°F (1.7°C)

above setpoint

Freezer Sequence Flow Chart

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

-2°F (-19°C) 2-min. Comp off

Startup

CTh in control

2-min. Comp on

timer starts

Power on

Comp de-energized

Comp energized

DrH energized

ConFM de-energized

ConFM energized

MH energized

EvapFM de-energized

EvapFM energized

PH energized

(60-sec. delay

after Comp

de-energized)

a) EvapFM de-energizes when door is opened on -FS models and when upper door is opened on -HS models.

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

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

d) 5-min. minimum defrost time.

e) 1-hr. maximum defrost time.

f) "dEF" displayed during defrost.

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

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

MH-mullion heater

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

PH-perimeter heater

Note: *Delays

(30-sec. delay

after Comp

energized)

Legend:

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DH-defrost heater

DrH-drain heater

DTh-defrost thermistor

EvapFM-evaporator fan motor

2. Cool Down Achieved

1. Startup/Cool Down

3. Cool Down Restart

5-hr. cumulative Comp run

time defrost timer starts

Slight

Delay at

B. Service Diagnosis

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.

• 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 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

Reach-In Refrigerators and Freezers

Except 2-Section Freezers

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."

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

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 and PH energize. There is a slight delay, Comp, ConFM, and EvapFM 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. 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.

b) 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.

c) 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).

d) 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).

e) 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.

f) 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 "g) 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.

g) 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 continues. 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."

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, 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 and ConFM 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 and ConFM 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. 3 min. Comp delay timer starts. Defrost icon, EvapFM icon, and "dEF" continues. EvapFM remains energized.

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

energize. Defrost icon, EvapFM icon, and "dEF" continues.

(3) 15-min. temperature display delay timer terminates. Cabinet temperature

replaces "dEF" on CM display.

Defrost Diagnosis:

1a) 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, 3-min. Comp delay timer starts. Once 3-min. Comp delay timer terminates, Comp icon turns on and Comp and ConFM energize. 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 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)g) 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: 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; TXV–thermostatic expansion valve; CUR–condensing unit receptacle

2. Freezer

5) Startup/Cool Down– MH, PH, and DrH 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) 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.

d) 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.

e) 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 "g) 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.

f) 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.

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

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

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. continuours 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-minute 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)g) 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; 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

Cord and Plug

2. On three-section model, check receptacle box cord and plug and one-section and two-section cords and plugs.

Wiring

Control Module

4. See "III.D. Alarm Safeties" and "II.C. Control Module Check."

Door Switch

Evaporator Fan Motor

6. High-Pressure Switch

Compressor External Protector

Compressor

9. Condenser

10. Evaporator

11. See "2. Evaporator Frozen Up."

Refrigerant/Refrigerant Lines

12.

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

Loose connection.

Not within specications.

Loose connection.

Defective.

Loose connection.

Faulty.

In alarm.

Defective.

Not engaged.

Defective.

Dirty condenser.

Ambient temperature too warm.

Condenser fan motor not operating.

Refrigerant overcharge.

Refrigerant lines or components restricted.

Defective.

Dirty condenser.

Condenser fan motor not operating.

Compressor capacitor or start relay defective.

Defective.

Dirty.

Clogged or frozen.

Refrigerant leak.

Refrigerant lines restricted.

2. Evaporator Frozen Up

Evaporator Frozen Up - Possible Cause

Evaporator

1. Evaporator Fan Motor

Defrost Thermistor

3. Control Module

4. Refrigerant Charge/Refrigerant

5. Lines

Defrost Heater (freezer)

Dirty.

Fan blades binding.

Defective.

Out of position or defective.

Defective.

Low.

Component restriction (TXV, cap tube, drier).

Defective.

3. Defrost

Refrigerator Defrost Fails to Initiate - Possible Cause

1. Control Module (cumulative compressor run or continuous compressor run defrost timer)

Refrigerator Defrost Fails to Terminate - Possible Cause

1. Defrost Thermistor (Conrm DTh status. See "II.D. Thermistor Check.")

2. Control Module a) Defrost thermistor connection loose.

a) Defective.

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

b) Defective.

Freezer Defrost Fails to Initiate - Possible Cause

5-hr. compressor cumulative run time

1. defrost timer terminated.

Control Module

2. Defrost Thermostat

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

Defective.

a) a)

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 Thermistor (Conrm DTh

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

Control Module

Defrost thermostat open.

Defective.

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

Defrost thermistor connection loose.

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

Manual Defrost Button

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.

Front Panel

Compressor Icon

ECO

°C °F

Up Button

Standby Button

Defrost Icon

Evaporator Fan Motor Icon

Alarm Icon

Down Button

Control Panel

2. Display Layout

Cabinet Thermistor

3. Control Module Connections

Cabinet Thermistor

5 VDC

Defrost Thermistor

5 VDC

115 VAC

Defrost Thermistor

Door Switch

5 VDC

Door Switch

1 (C) Compressor (V)

2 (L) Power Supply (BK)

3 (N) Neutral (W)

4 (H) Defrost Heater (R) (Freezer)

5 (F) Evaporator Fan Motor (DBU)

6 (LED) Cabinet Lights (Y)

B. Temperature

EHE

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 41°F (5°C), and the compressor goes off at 31°F (-1°C). If necessary, adjust the temperature setpoint as follows:

1) To change the temperature setpoint, press and hold the up button briey and then

release. 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, follow the steps below. The factory default is °F.

1) Press and hold both the up and down buttons for 5 seconds. "PAS" appears briey in the display, then "000" appears.

2) Press the up button to change the display to "001".

3) Press the standby button. " until "diS" is displayed.

4) Press the standby button. "CFu" appears in the display. Press the standby button again. The current temperature display scale setting appears. Press the up or down button to change the temperature display scale.

5) Press the standby button to save the setting. Wait 1 minute or press the manual defrost button twice to return to the temperature display.

" appears in the display. Press the up or down button

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 an off cycle defrost initiated by a 2-hr. cumulative compressor run or a 2-hr. continuous compressor run defrost timers. As soon as the compressor energizes, the defrost timers start. When either of the 2defrost timers terminate, defrost begins. Cabinettemperature is not displayed during defrost; "dEF" is displayed in its place. The evaporator fan motor runs during defrost. When the defrost thermistor warms to 44°F (6.6°C), defrost terminates. "dEF" is displayed during defrost. Once the compressor energizes the 15-min. display timer starts. Once the 15-min. display timer terminates, cabinet temperature is displayed. Refrigerators have a minimum defrost interval of 2-hrs. The minimum defrost time is 5-min. and the maximum defrost time is 1-hr.

2. Freezers

Freezers use a heated defrost initiated by a 5-hr. cumulative compressor run or a 4-hr.continuous compressor run defrost timer. As soon as the compressor energizes, the defrost timers start. When either of the 2 defrost timers terminate, defrost begins. Cabinettemperature is not displayed during defrost; "dEF" is displayed in its place. When the defrost thermistor warms to 77°F (25°C), defrost terminates. A 3-min. compressor delay timer starts. Once the 3-min. compressor delay timer terminates a 4-min. evaporator fan motor delay timer starts. Once the 4-min. evaporator fan motor terminates, 15-min. temperature display delay timer starts. Once the 15-min. temperature display delay timer terminates, cabinet temperature replaces "dEF" on the display. Note that the 4-min. evaporator fan motor delay time is a maximum; if the defrost thermistor cools to 15°F (-9°C) before the 4-min. evaporator fan motor delay timer terminates, the evaporator fan motor will energize and the 15-min. temperature display delay timer starts. Freezers have a minimum defrost interval of 5-hrs. The minimum defrost time is 5-min. and the maximum defrost time is 1-hr.

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

Cabinet Thermistor Malfunction Alarm

Call a qualied service technician.

E01

E02

Cabinet thermistor has failed.

Defrost Thermistor Malfunction Alarm

Defrost thermistor has failed.

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.

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.

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. 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. 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.

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

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.

F. Mullion/Perimeter Heater

Refrigerators are equipped with mullion heaters and the freezers are equipped with mullion and perimeter heaters. The heaters are energized when the appliance is plugged into the electrical outlet.

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.

• 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

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 Thermistor

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.E. 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. 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.

2. 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.

5) Plug the appliance back in.

3. 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

AC Supply

Model

R1A-FG/FGCL/FGCR//HG R1A-FS/FSJ/FSL/FSLJ/HS/HSL PT1A-FG-FG/FS-FS/HS-HS

R2A-FG/HG/FS/HS PT2A-FS-FS/HS-HS/FG-FG

R3A-FS/HS

F1A-FG/HG 9 F1A-FS/FSL/HS/HSL 9 F2A-FG/HG 9.5 F2A-FS/HS 9.5

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

DT1A-HS 115/60/1

DT2A-FS/HS 115/60/1 14

Voltage Amperes

5 4.6

115/60/1

9.5

5.5

Refrigerant

(oz.)

R290 HIGH LOW

4.9

5.3

4.6 Right

4.6 Left

4.1

4.2

4.1 Right

4.1 Left Freezer

2.5

Refrigerator

2.1

Freezer

4.1

Refrigerator

4.6

Design Pressure

(PSIG)

360 190

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

Glass Door LEDs Controlled Through Control Module Light Switch.

115 VAC

5 to 12VDC

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

2. F2A-FG/FS/HG/HS

Glass Door LEDs Controlled Through Control Module Light Switch.

115 VAC

5 to 12VDC

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

3. PT2A-FG-FG/FS-FS/HS-HS

115 VAC

5 to 12VDC

Glass Door LEDs Controlled Through Control Module Light Switch.

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

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

5 to 12VDC

115 VAC

Solid Door LEDs Controlled Through Door Switch.

Glass Door LEDs Controlled Through Control Module Light Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

5. F3A-FS/HS

115 VAC

5 to 12VDC

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

6. DT1A-HS

PSIG

* High-Pressure Switch

Cut-out 360±

Cut-in 249±10 PSIG

7. DT2A-FS/HS

Main Connection

System Connection

Glass Door LEDs Controlled Through Control Module Light Switch.

115 VAC

5 to 12VDC

Solid Door LEDs Controlled Through Door Switch.

* High-Pressure Switch

Cut-out 360±30PSIG

Cut-in 249±10 PSIG

Hoshizaki CR60A, CR49A, R2AHS, CR36A, R2AFG User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important Safety Information

I. General Information

A. Construction

B. Refrigeration Flow Chart

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Charts

1. Refrigerator

2. Freezer

B. Service Diagnosis

1. Refrigerator

2. Freezer

C. Control Module Check

D. Thermistor Check

E. Diagnostic Tables

III. Controls and Adjustments

A. Control Module

B. Temperature

1. Default Settings

2. Temperature Setpoint

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

C. Defrost

D. Alarm Safeties

E. Safety Devices

F. Mullion/Perimeter Heater

IV. Refrigeration Circuit and Component Service Information

A. Service for Refrigerant Lines

B. Component Service Information

C. Door Reversal

V. Maintenance

VI. Preparing the Appliance for Periods of Non-Use

VII. Disposal

VIII. Technical Information

A. Electrical and Refrigerant Data

B. Wiring Diagrams

2. F2A-FG/FS/HG/HS

3. PT2A-FG-FG/FS-FS/HS-HS

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

5. F3A-FS/HS

6. DT1A-HS

7. DT2A-FS/HS