Hoshizaki CR1S-FSL, CF1S-HSL Service Manual

Service Manual

Commercial Series Refrigerated Kitchen Equipment

Models Upright S-Series

hoshizakiamerica.com

Number: 73207 Issued: 8-3-2015 Revised: 6-24-2016

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

HOSHIZAKI AMERICA, INC. 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

1a. Refrigerator Auxiliary Code F-6 and Earlier ..........................................................11

1b. Refrigerator: Auxiliary Code F-7 and Later ........................................................... 12

2a. Freezer: Auxiliary Code F-7 and Earlier ............................................................... 13

2b. Freezer: Auxiliary Code F-8 and Later ................................................................. 14

B. Service Diagnosis ....................................................................................................... 15

1a. Refrigerator: Auxiliary Code F-6 and Earlier ........................................................ 16

1b. Refrigerator: Auxiliary Code F-7 and Later ........................................................... 19

2a. Freezer: Auxiliary Code F-7 and Earlier ............................................................... 22

2b. Freezer: Auxiliary Code F-8 and Later ................................................................. 27

C. Control Module Check ................................................................................................. 32

D. Thermistor Check ........................................................................................................ 34

E. Diagnostic Tables ........................................................................................................ 35

III. Controls and Adjustments ............................................................................................... 37

A. Control Module ............................................................................................................ 37

1. Display Icons ...................................................................................................... 37

2. Display Layout .................................................................................................... 37

3. Control Module Connections ............................................................................... 38

B. Temperature ............................................................................................................... 39

1. Default Settings ...................................................................................................... 39

2. Temperature Setpoint ............................................................................................ 39

3. Changing the Temperature Display Scale (°F or °C) ............................................. 39

C. Defrost ........................................................................................................................ 40

D. Alarm Safeties ............................................................................................................. 41

E. Safety Devices ............................................................................................................ 42

F. Mullion/Perimeter Heater ............................................................................................. 42

IV. Replacement of Components ......................................................................................... 43

A. Service for Refrigerant Lines ....................................................................................... 43

B. Important Notes for Component Replacement ............................................................ 46

C. Door Reversal ............................................................................................................. 46

V. Maintenance .................................................................................................................... 47

VI. Preparing the Appliance for Periods of Non-Use ............................................................ 48

VII. Disposal ......................................................................................................................... 49

VIII. Technical Information .................................................................................................... 50

A. Electrical and Refrigerant Data ................................................................................... 50

B. Wiring Diagrams .......................................................................................................... 51

1. CR1S-FS/FSL/HS/HSL Auxiliary Code E-5 and Earlier ......................................... 51

2. CR2S-FS/HS Auxiliary Code E-5 and Earlier ........................................................ 52

3. CR1S-FGY/FS/FSL/HS/HSL, CR2S-FGY/FS/HS/FGY,

CR3S-FS/HS Auxiliary Code E-6 to F-6 ................................................................ 53

4. CR1S-FGE/FGECL/FGECR/FS/FSL/HS/HSL,

CR2S-FGE/FS/HS Auxiliary Code F-7 and Later .................................................. 54

5. CF1S-FS/FSL/HS/HSL Auxiliary Code E-5 and Earlier ......................................... 55

6. CF1S-FS/FSL/HS/HSL Auxiliary Code E-6 to F-7 ................................................. 56

7. CF1S-FGE/FGECL/FGECR/FS/HS F-8 and Later ................................................. 57

8. CF2S-FS/HS Auxiliary Code E-5 and Earlier ......................................................... 58

9. CF2S-FS/FSL/HS/HSL Auxiliary Code E-6 to F-7 ................................................. 59

10. CF2S-FGE/FGECL/FGECR/FS/FSL/HS/HSL Auxiliary Code F-8 and Later ....... 60

11. CR3S-FS/HS Receptacle Box Connection ........................................................... 61

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the appliance or damage to property.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

NOTICE Indicates a situation which could result in damage to the

appliance or property.

IMPORTANT Indicates important information about the use and care of the

appliance.

WARNING

The appliance should be destined only to the use for which it has been expressly conceived. Any other use should be considered improper and therefore dangerous. The manufacturer cannot be held responsible for injury or damage resulting from improper, incorrect, and unreasonable use. Failure to service and maintain the appliance in accordance with this manual will adversely affect safety, performance, component life, and warranty coverage.

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.

• The appliance must be installed in accordance with applicable national, state, and local codes and regulations.

• 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, or damage to existing wiring. This could lead to heat generation or re.

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

• Make sure the power switch is in the "OFF" position before plugging in or unplugging the appliance to reduce the risk of electric shock.

• Before servicing, move the power switch to the "OFF" position. Unplug the appliance from the electrical outlet.

For 115VAC Models

• THE APPLIANCE MUST BE GROUNDED: The appliance is equipped with a NEMA5-15 three-prong grounding plug 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 plug and do not use an adapter plug. Failure to follow these instructions may result in death, electric shock, or re.

to reduce the risk of potential shock

WARNING, continued

For 208-230VAC Models

• THE APPLIANCE MUST BE GROUNDED: The appliance is equipped with a

NEMA L14-20 four-prong locking, grounding plug shock hazards. It must be plugged into a properly grounded, independent 4-prong wall outlet. If the outlet is a 3-prong outlet or a 4-prong non-locking outlet, it is your personal responsibility to have a qualied electrician replace it with a properly grounded, independent 4-prong locking wall outlet. Do not remove the ground prong from the plug and do not use an adapter plug. After plugging in, twist the plug clockwise to lock it into place. Failure to follow these instructions may result in death, electric shock, or re.

For All Models

• 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 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. Before unplugging a 4-prong plug, rotate the plug counter-clockwise to unlock it.

to reduce the risk of potential

• 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.

• Children should be properly supervised around the appliance.

• Do not climb, stand, or hang on the appliance or door 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 door. Be careful when opening and closing the door when children are in the area.

• Open and close the doors with care. Doors opened 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 near the appliance. They might catch re.

• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance could cause harm to individuals or damage to the appliance.

• 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.

WARNING, continued

• Do not place anything on top of the appliance. Foreign objects or moisture could enter the appliance and result in electric shock or re.

• 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 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.

• 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.

• 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 the air outlet. They might 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 place anything on top of the appliance. Blockage of airow could negatively affect performance and damage the appliance.

• 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.

I. General Information

A. Construction

1. Solid Door Models

Control Box

Power Switch

Compressor

Thermostatic Expansion Valve

Condenser Fan Motor

Condenser

Front Panel

Power Cord

Control Module

Light

Door Switch

Door Lock

Door

Door Gasket

Condensate Tube and Spring

Condensate Pan

Pressure Relief Valve

Model Shown: CR1S-FS

• Evaporator

• Cabinet Thermistor

• Defrost Thermistor

• Evaporator Fan Shroud

2. Glass Door Models

Thermostatic Expansion Valve

Condenser Fan Motor

Control Box

Power Cord

Power Switch

Control Module

• Evaporator

• Cabinet Thermistor

• Defrost Thermistor

• Evaporator Fan Shroud

Compressor

Light Switch (glass door models only)

Condenser

Front Panel

Door Lock

24VDC Driver FGE Glass Door Models

LED Lights FGE Glass Door Models

Door

Door Gasket

Fluorescent Light Assembly: FGY Glass Door Models

Fluorescent Light Ballast

Fluorescent Light Mount

Fluorescent Light Bulb

Fluorescent Light Bulb Guard

Model Shown: CR2S-FGE

Pressure Relief Valve

Condensate Tube and Spring

Condensate Pan

Model Shown: CR2S-FGE

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

1a. Refrigerator Auxiliary Code F-6 and Earlier

DTh warms to

40°F (4.4°C) or

1-hr maximum

defrost timer

5. Defrost Termination

terminates

Comp energized

ConFM energized

EvapFM energized

DTh in control

20-min.

minimum

2-hr defrost timer

4. Defrost

2. Cool Down Achieved

terminates

CTh warms

to 3°F (1.7°C)

above

CTh cools

to 3°F (1.7°C)

below setpoint.

setpoint

Factory default

3. Cool Down Restart

Refrigerator Auxiliary Code F-6 and Earlier Sequence Flow Chart

defrost

36°F (2°C)

2-min. Comp off

timer starts

CTh in control

2-min. Comp on

timer starts

EvapFM energized

Comp energized

Comp de-energized

ConFM energized

ConFM de-energized

EvapFM energized

Note:

Legend:

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

Comp-compressor

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) 20-min. minimum defrost time.

e) 1-hr. maximum defrost time.

f) Temperature displayed during defrost.

ConFM-condenser fan motor

CTh-cabinet thermistor

DTh-defrost thermistor

EvapFM-evaporator fan motor

1. Startup/Cool Down

Cycle Steps

Slight

Delay at

Startup

EvapFM energized

Power On

1b. Refrigerator: Auxiliary Code F-7 and Later

DTh warms to

44°F (6.6°C) or

1-hr maximum

defrost timer

terminates

DTh in control

20-min.

minimum

defrost

5. Defrost Termination

2-hr defrost timer

4. Defrost

Comp energized

ConFM energized

EvapFM energized

Comp de-energized

ConFM de-energized

EvapFM de-energized

CTh warms

to 3°F (1.7°C)

above setpoint

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

33°F (1°C)

2-min. Comp off

2. Cool Down Achieved

Refrigerator Auxiliary Code F-7 and Later 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) 20-min. minimum defrost time.

e) 1-hr. maximum defrost time.

Comp de-energized

ConFM de-energized

EvapFM de-energized

CTh in control

Note:

f) Temperature displayed during defrost.

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

Cycle Steps

Slight

Delay at

Startup

Power on

2a. Freezer: Auxiliary Code F-7 and Earlier

DTh warms to 59°F (15°C)

5. Defrost Termination

MH energized

DTh in control

PH energized

DH de-energized

DrH de-energized

After Delay:

Comp energized

ConFM energized

EvapFM energized

4-hr cumulative Comp run

4. Defrost

2. Cool Down Achieved

Freezer Auxiliary Code F-7 and Earlier Sequence Flow Chart

time defrost timer terminates

DH energized

DrH energized

MH energized

PH energized

Comp de-energized

ConFM de-energized

EvapFM de-energized

CTh warms

to 3°F (1.7°C)

above setpoint

CTh cools to

3°F (1.7°C)

below setpoint.

Factory default

-4°F (-20°C) 2-min. Comp off

timer starts

EvapFM energized

MH energized

PH energized

Comp de-energized

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

g) 7-minute EvapFM delay timer starts when defrost termination temperature is met (3-minute delay timer when defrost initiated manually)

h) 18-minute temperature display delay timer starts when defrost termination temperature is met (15-minute delay timer when defrost

Note:

CTh in control

initiated manually).

3. Cool Down Restart

2-min. Comp on

4-hr. cumulative Comp run

time defrost timer starts

timer starts

Comp energized

ConFM energized

EvapFM energized

MH energized

PH energized

1. Startup/Cool Down

Slight

Delay at

Startup

Power on

MH energized

PH energized

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

2b. Freezer: Auxiliary Code F-8 and Later

DTh warms to 45°F (7.2°C)

5. Defrost Termination

DH de-energized

DTh in control

DrH energized

After Delay:

Comp energized

ConFM energized

EvapFM energized

MH energized

PH energized

5-hr. cumulative Comp run

4. Defrost

2. Cool Down Achieved

time defrost timer terminates

CTh cools to

CTh warms

to 3°F (1.7°C)

3°F (1.7°C)

below setpoint.

above setpoint

Factory default

-4°F (-20°C) 2-min. Comp off

CTh in control

DH energized

DrH energized

Comp de-energized

ConFM de-energized

EvapFM de-energized

MH de-energized

PH de-energized

timer starts

Comp de-energized

ConFM de-energized

DrH energized

EvapFM de-energized

MH de-energized

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

g) 7-minute EvapFM delay timer starts when defrost termination temperature is met (3-minute delay timer when defrost initiated manually)

h) 18-minute temperature display delay timer starts when defrost termination temperature is met (15-minute delay timer when defrost

Note:

initiated manually).

Freezer Auxiliary Code F-8 and Later Sequence Flow Chart

3. Cool Down Restart

2-min. Comp on

timer starts

Comp energized

ConFM energized

DrH energized

EvapFM energized

MH energized

PH energized

1. Startup/Cool Down

5-hr. cumulative Comp run

time defrost timer starts

Slight

Delay at

Startup

Power on

DrH energized

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

B. Service Diagnosis

WARNING

• The appliance should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re.

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

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

• 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 (7.2°C to 38°C) – Glass Door Freezers 45°F to 80°F (7.2°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:

Side Top Rear

3" (8 cm) 12" (31 cm) 1" (3 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 F-6 and Earlier 36°F (2°C)

F-7 and Later 33°F (1°C)

Freezer All -4°F (-20°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) Move the power switch to the "OFF" position.

2) Unplug the appliance from the electrical outlet.

3) Remove the control box cover.

4) Plug the appliance back into the electrical outlet.

5) Move the power switch to the "ON" position.

6) Conrm 115VAC at the power switch. On 3-section models, also conrm proper supply voltage at the receptacle box (115VAC for refrigerator/208-230VAC for freezer).

1a. Refrigerator: Auxiliary Code F-6 and Earlier

7) Startup/Cool Down–There is a slight delay, cabinet temperature appears on display. Comp, ConFM, EvapFM, and MH energize. 2-hr defrost timer starts.

a) EvapFMDiagnosis: Conrm EvapFM energizes. If not, conrm doors are closed

and DS engaged. Next, check for 115VAC at DSR #8 (LBU or GY) to DSR #7(W). If115VAC is not present, check DS continuity. If DS is engaged and contacts are open, replace DS. If 115VAC is present, check for 115VAC at DSR #4(DBU) to neutral (W). If115VAC is not present, check for 115VAC at DSR #6(BK or W/BU) to neutral(W). If 115VAC is present at DSR #6 (BK or W/BU) to neutral (W) and not at DSR#4(DBU) to neutral (W), replace DSR. If 115VAC is present at DSR #4 (DBU) to neutral (W), check EvapFM blades for binding and EvapFM continuity.

b) Cabinet Light FGY (FGYCR and FGYCL) Diagnosis: Open the door and conrm

CLS is in the ON position. If not, move CLS to the ON position. CLS turns on. If CLS does not turn on, check for 115VAC at both CLS (BK) wires to neutral(W). If 115VAC is present at 1 CLS(BK) wire and not at the other, conrm power supply and continuity of CLS switch. If power supply is ok, check CLS continuity. IfCLS is engaged and CLS switch is open, replace CLS. If CLS is engaged, contacts are closed, and 115VAC is present at CLS(BK) and CL is not energized, replace CL. FS/HS CL Diagnosis: Open the door (upper on HS) and conrm CL is energized. Ifnot, with the door open, check for 115VAC at DSR #5 (BK) to neutral(W) and DSR #1 (V or Y) to neutral(W). If115VAC is not present at DSR #5 (BK), conrm power supply and continuity of power switch. If 115VAC is present at DSR #5 (BK) and not present at DSR #1 (V or Y), check DS continuity. IfDS is disengaged and contacts are closed (DSR energized), replace DS. If DSR is de-energized and 115VAC is present at DSR#5(BK) and not at DSR #1 (V or Y) to neutral (W), replace DSR. If 115VAC is present at DSR #1 (V or Y) and CL is not energized, replace CL.

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

CM L2 (BK) to CM N3 neutral (W). If 115VAC is not present, check power switch, power cord connections, and breaker/fuse. Conrm wiring connections are secure for both CM L2 (BK) (power supply) and CMN3(W) (neutral). If 115VAC is present and display is off, replace CM.

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

115VAC at CM C1 (R or 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, replace CM. If115VAC is present at CM C1 (R or V) to neutral (W), check for 115VAC at CR #0 (GY or P) to CR#1(W). If 115VAC is not present, check continuity of HPS. If open, allow time for HPS to reset (cut out: 300±10 PSIG, cut in: 190±20 PSIG). If HPS does not reset, see "e) HPS Activation" below. IfHPS is closed and 115VAC is present, check for 115VAC at CR#4(BK) and CR #6(R) to neutral (W). If 115VAC is present at CR #4 (BK) and not at CR#6(R), replace CR. If115VAC is present at CR #6 (R) to neutral (W) and ConFM is energized but Comp is not, give time for Comp internal protector to cool and reset. Next, check Comp start capacitor, start relay, and Comp motor windings. If Comp does not start, replace Comp. 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.

e) HPS Activation (cut out: 300±10 PSIG, cut in: 190±20 PSIG): 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.

8) Cool Down Achieved–CTh cools to 3°F (1.7°C) below setpoint. EvapFM continues. Comp and ConFM de-energize. Diagnosis: Conrm 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." If CTh ohm reading is in range and Comp and ConFM continue longer than 2 min., check for 115VAC at CM C1 (R or V) to neutral(W). If115VAC is present, replace CM. If 115VAC is not present and Comp and ConFM continue, check for 115VAC at CR #1 (R or V). If 115VAC is present, replace CR.

9) Defrost–Cabinet temperature is displayed during defrost. There is a 20-min. minimum defrost time, a 1-hr. maximum defrost time, and a 2-hr. minimum defrost interval.

1a) Time-Initiated: 2-hr. defrost timer terminates. EvapFM continues. Comp and ConFM

de-energize.

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

on display. Defrost icon turns on and, if energized, Comp and ConFM de-energize. Cabinet temperature is displayed during defrost.

2) Defrost Termination: DTh warms to 40°F (4.4°C). EvapFM and MH continue. Comp and ConFM energize.

Defrost Diagnosis:

1a) Time-Initiation: 2-hr. defrost timer terminates.

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

icon turns off. If not, replaceCM.

(2) Comp and ConFM Diagnosis: Conrm Comp and ConFM de-energize.

If not, check for 115VAC at CM C1 (R or V) to neutral (W). If 115VAC is present, replace CM. If 115VAC is not present and Comp and ConFM continue, check CR#6(R) to neutral (W). If 115VAC is present, replace CR.

1b) Manual-Initiation: After pressing the manual defrost button, check the following:

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

displayed. If not, replace CM.

(2) Comp and ConFM Diagnosis: Conrm Comp and ConFM de-energize.

2) Defrost Temperature Termination: DTh warms to 40°F (4.4°C). If not, conrm DTh status. See "II.D. Thermistor Check." If DTh is in proper range, have Comp and ConFM energized? If not, see "7d) Comp and ConFM Diagnosis"above.

Legend: CL–cabinet light; CLS–cabinet light switch (FGY); CM–control module;

Comp–compressor; ConFM–condenser fan motor; CR–compressor relay; CTh–cabinet thermistor; DS–door switch (FS/HS); DSR–door switch relay (FS/HS); DTh–defrost thermistor; EvapFM–evaporator fan motors; HPS–high-pressure switch; TXV–thermostatic expansion valve

1b. Refrigerator: Auxiliary Code F-7 and Later

7) Startup/Cool Down–There is a slight delay, cabinet temperature appears on display. Comp, ConFM, EvapFM, and MH energize. 2-hr. defrost timer starts.

a) EvapFMDiagnosis: Conrm EvapFM energizes. If not, conrm doors are closed

and DS engaged. Next, check for 115VAC at DSR #8 (GY) to #7(W). If115VAC is not present, check DS continuity. If DS is engaged and contacts are open, replace DS. If 115VAC is present, check for 115VAC at DSR #4(DBU) to neutral (W). If115VAC is not present, check for 115VAC at DSR #6(W/BU) to neutral(W). If 115VAC is not present at DSR #6 (W/BU) to neutral (W) check for 115VAC at CM #5 (W/BU) to neutral (W). If115VAC is not present at CM #5 (W/BU) to neutral (W), replace CM. If 115VAC is present at CM #5 (W/BU) to neutral (W) and not at DSR#6(W/BU) to neutral (W), check wiring connections from CM to DSR. If 115VAC is present at DSR #6 (W/BU) to neutral (W) and not at DSR #4 (DBU) to neutral (W), replace DSR. If115VAC is present at DSR #4 (DBU) to neutral (W) and EvapFM is not energized, check EvapFM blades for binding and EvapFM continuity.

b) Cabinet Light FGE (FGECR & FGECL) Diagnosis: Open the door and conrm CLS

is in the ON position. If not, move CLS to the ON position. LEDs turn on. If LEDs do not turn on, check for 115VAC at CLS yellow (Y) wire to neutral(W) and CLS black (BK) wire to neutral (W). If 115VAC is present at CLSyellow (Y) wire and not at CLS black (BK) wire, conrm continuity of CLS switch. IfCLS is engaged and CLS switch is open, replace CLS. IfCLS is engaged, contacts are closed, and 115VAC is present at CLSblack (BK) wire 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. FS/HS CL Diagnosis: Open the door (upper on HS), conrm CL energizes. If not, check for 115VAC at DSR #5 (BK) to neutral(W) and DSR #1 (Y) to neutral(W). If115VAC is not present at DSR #5 (BK), conrm power supply and continuity of power switch. If 115VAC is present at DSR #5 (BK) to neutral (W) and not present at DSR #1 (Y) to neutral (W), conrm DS is open (not engaged). IfDS is disengaged and contacts are closed (DSR energized), replace DS. IfDSR is de-energized and 115VAC is present at DSR#5(BK) and not at DSR #1 (Y) to neutral (W), replace DSR. If 115VAC is present at DSR #1 (Y) and CL is not energized, replace CL.

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

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