Hoshizaki CRMF48, CRMR60W, CRMF48W, CRMR60, CRMR27WD Service Manual

Service Manual

Commercial Series
Refrigerated Kitchen Equipment

Models
Undercounter
Worktop
Prep Table

hoshizakiamerica.com

Number: 73191
Issued: 9-29-2011
Revised: 5-1-2017

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 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: [phone]
Fax: [phone]

E-mail: [e-mail]

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.

2

IMPORTANT

This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this booklet carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this booklet for any further reference that may be necessary.

CONTENTS

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

I. Construction and Refrigeration Circuit Diagram ................................................................. 8

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

B. Refrigeration Circuit Diagram ........................................................................................ 9

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

A1. Thermostat Control Sequence of Operation Flow Chart ............................................ 10

1. Undercounter and Work Top: Refrigerator .............................................................. 10

2. Prep Table ...............................................................................................................11

3. Undercounter and Work Top: Freezer .....................................................................11

A2. Thermistor/Control Module Sequence of Operation Flow Chart ............................... 12

1. Undercounter and Work Top: Refrigerator .............................................................. 12

2. Prep Table .............................................................................................................. 13

3. Undercounter and Work Top: Freezer .................................................................... 14

B1. Thermostat Control Service Diagnosis ...................................................................... 15

1. Undercounter and Worktop: Refrigerator ................................................................ 15

2. Prep Table .............................................................................................................. 16

3. Undercounter and Worktop: Freezer ...................................................................... 17

B2. Thermistor/Control Module Service Diagnosis .......................................................... 19

C. Defrost Timer Check ................................................................................................... 23

D. Control Module Check ................................................................................................. 24

E. Diagnostic Table .......................................................................................................... 26

III. Controls and Adjustments ............................................................................................... 28

A. Temperature Settings .................................................................................................. 28

B. Defrost ......................................................................................................................... 28

C. Safety Devices ............................................................................................................ 30

D. Perimeter and Mullion Heaters .................................................................................... 30

IV. Refrigeration Circuit and Component Service Information.............................................. 31

A. Refrigeration Circuit Service Information .................................................................... 31

B. Component Service Information .................................................................................. 33

C. Door Reversal ............................................................................................................. 34

D. Door/Drawer Location Reversal .................................................................................. 37

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

VI. Disposal .......................................................................................................................... 49

3

VII. Technical Information ..................................................................................................... 50

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

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

1a. Undercounter and Worktop: Refrigerator; Cabinet Thermostat ............................ 51

1b. Undercounter and Worktop: Refrigerator; Cabinet Thermistor/Control Module .... 52

2a. Prep Table; Cabinet Thermostat (Without Defrost Heater) ................................... 53

2b. Prep Table; Cabinet Thermostat (With Defrost Heater) ........................................ 54

2c. Prep Table; Cabinet Thermistor/Control Module ................................................... 55

3a. Undercounter and Work Top: Freezer; Cabinet Thermostat ................................. 56

3b. Undercounter and Work Top: Freezer; Cabinet Thermistor/Control Module ......... 57

4

Important Safety Information

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

WARNING Indicates a hazardous situation which could result in death or

serious injury.

NOTICE Indicates a situation which could result in damage to the

appliance or property.

IMPORTANT Indicates important information about the use and care of the

appliance.

WARNING

This 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 this appliance.

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

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

• Unplug the appliance before servicing.

• This 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.

• THIS APPLIANCE MUST BE GROUNDED. This 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 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.

to reduce the risk of potential shock

5

WARNING, continued

• The GREEN ground wire in the factory-installed power cord is connected to the
appliance. If it becomes necessary to remove or replace the power cord, be sure
to connect the power cord's ground wire.

• Do not splash, pour, or spray water directly onto or into the appliance. This might
cause short circuit, electric shock, corrosion, or failure.

• Do not make any alterations to the appliance. Alterations could result in electric
shock, injury, re, or damage to the appliance.

• This appliance is not intended for use by persons (including children) with reduced
physical, sensory, or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.

• Children should be properly supervised around this 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 doors or rail cover
(prep table models). Be careful when opening and closing the doors or rail cover
when children are in the area.

• Open and close the doors and rail cover (prep table models) with care. Opening
the doors or rail cover 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.

• This 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.

6

WARNING, continued

• 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.

Additional Warnings for Prep Table Models

• The entire rail must always be covered by rail dividers and pans (1/6 size, up to
6"(15cm)deep). Otherwise, the appliance will not cool properly.

• Use only 1/6 size pans up to 6"(15cm) deep. Do not use damaged pans.

• Ingredients must be pre-chilled to 37°F (3°C) or less before placing in rail.

• Keep the rail cover closed when not actively preparing food.

• The rail is for keeping ingredients cool while preparing food. If not actively
preparing food for a long period such as overnight, seal pans with plastic
wrap in addition to closing the rail cover. Depending on conditions, the cabinet
temperature setting may need to be adjusted to prevent items from freezing.
Alternatively, seal ingredients and store them in a refrigerator or freezer.

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 in an
undercounter installation. There must be at least 1.5" (4 cm) overhead clearance
for proper ventilation. The factory-installed rear bumpers must be in place
to ensure proper rear clearance. Blockage of airow could negatively affect
performance and damage the appliance.

• 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.

• To avoid damage to the top seal, do not lift the appliance by the top panel or
remove the top panel.

Additional Notice for Prep Table and Mega Top Models

• Do not place anything on top of the rail hood or rail cover and do not lift the
appliance by the rail hood or rail cover. The rail hood and rail cover are not
designed to bear any outside weight.

• CRMR27-8(-12M) Auxiliary Code B-5 to C-7: Do not place anything on the air
distribution table beneath the pans. The air distribution table is not a load-bearing
surface.

7

I. Construction and Refrigeration Circuit Diagram

A. Construction

Undercounter, Worktop, Prep Table

Common Parts

• Evaporator

• Evaporator Fan

• Evaporator Fan Shroud
Nameplate

Thermometer

Door Gasket

Door

Cabinet Temperature Control Dial
(Cabinet Thermostat/Thermistor)
Verify Auxiliary Code in Parts List
for Change

Power Cord

Prep Table

Specic Parts

Air Distribution Table Panels

CRMR27-8, CRMR27-12M
Auxiliary Codes B-5 to C-7

Upper Front

Lower Front

Pans

Rail Dividers

Upper Rear

Lower Rear

Rail Hood

Defrost Timer:
Prep Table and
Freezer.
Verify Auxiliary
Code in Parts List
for Change

Rear Panel

Control Module:
Verify Auxiliary Code in
Parts List for Change

Condenser

Condenser Fan Motor

Compressor

Model Shown: CRMF27

Model Shown: CRMR36-10

Rail Cover

Cutting Board

Model Shown: CRMR27-12M

8

B. Refrigeration Circuit Diagram

1. Refrigerator and Freezer

Condenser

High-Pressure Switch
CRMR60 and CRMR72 Prep Table,
CRMF48, and CRMF60

Capillary Tube

Thermostatic
Expansion Valve

CRMF48(-W)
Auxiliary Code: A-5 and B-5

Condenser Fan

Evaporator Fans
(1, 2, or 3 depending on model)

Drier

Compressor

Evaporator

Cabinet Thermostat Bulb

Freezer and Prep Table Models: Defrost Heater, Defrost Safety Thermostat, and Defrost Thermistor

9

II. Sequence of Operation and Service Diagnosis

The steps in the sequence are as outlined below.
See the table for default cabinet temperature control settings.

Model Default Cabinet Temperature

Approximate Default Temperature

Control Setting

Undercounter
Worktop

Between 4 and 5 Refrigerator: 34°F (1°C)

Freezer: -5°F (-21°C)

Prep Table 6 34°F (1°C)

A1. Thermostat Control Sequence of Operation Flow Chart

1. Undercounter and Work Top: Refrigerator

Refrigerator Sequence Flow Chart

1. Startup/Cool Down

CTh above setpoint CTh cools to setpoint

CTh closed
Comp energized
ConFM energized
EvapFM energized

Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermostat
EvapFM-evaporator fan motor

CTh open
EvapFM energized CRMR60 and CRMR72
Comp de-energized
ConFM de-energized
EvapFM de-energized CRMR27 and CRMR48

2. Cool Down Achieved

CTh in control

CTh above

Off cycle defrost
between run cycles.

setpoint

10

2. Prep Table

Prep Table/Mega Top Sequence Flow Chart

1. Startup

EvapFM energized

(without DH)

Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermistor
DH-defrost heater
DTh-defrost thermistor
EvapFM-evaporator fan motor
MH-mullion heater
PH-perimeter heater

2. Cool Down

CTh above setpoint

CTh closed
Comp energized
ConFM energized
EvapFM energized

(with DH)

3. Cool Down Achieved

CTh cools to setpoint

CTh in control

CTh open
EvapFM energized
Comp de-energized
ConFM de-energized

4. Defrost

20 or 25 min. DT in

CTh above

8 or 6-hr. DT terminates
20 or 25-min. DT starts
DH energized
EvapFM energized (without DH)
Comp de-energized
ConFM de-energized
EvapFM de-energized (with DH)

control

setpoint

8 or 6-hr. DT terminates
20 or 25-min. DT starts
DH de-energized (if applicable)

CTh above

setpoint

3. Undercounter and Work Top: Freezer

Freezer Sequence Flow Chart

1. Startup/Cool Down

CTh above setpoint

CTh in control

CTh closed
Comp energized
ConFM energized
EvapFM energized
MH energized
PH energized

Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermistor
DH-defrost heater
DTh-defrost thermistor
EvapFM-evaporator fan motor
MH-mullion heater
PH-perimeter heater

2. Cool Down Achieved

CTh cools to setpoint

CTh open
Comp de-energized
ConFM de-energized
EvapFM de-energized
MH de-energized
PH de-energized

3. Defrost

DT* in control

CTh above

setpoint

8 or 6-hr. DT terminates

20 or 25-min. DT starts
DH energized
Comp de-energized
ConFM de-energized
EvapFM de-energized
MH de-energized
PH de-energized

CTh above

setpoint

20 or 25-min. DT terminates
8 or 6-hr. DT starts
DH de-energized

11

A2. Thermistor/Control Module Sequence of Operation Flow Chart

1. Undercounter and Work Top: Refrigerator

Refrigerator Sequence Flow Chart

1. Startup/Cool Down

CTh above setpoint

*

2-min. Comp

Power on
Red LED On
(5 sec. Delay)

Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermistor
EvapFM-evaporator fan motor

on timer starts

Green LED Flashes
If Red LED ashes, check CTh

Comp energized
ConFM energized
EvapFM energized

2. Cool Down Achieved

CTh cools to setpoint

CTh in control

*

2-min. Comp
off timer starts

Green LED Flashes
If Red LED ashes, check CTh

Comp de-energized
ConFM de-energized
EvapFM de-energized

Note: Delays

*

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

Off cycle defrost
between run cycles

CTh above

setpoint

12

2. Prep Table

°F (4.4°C).

achieved
44°F (6.7°C)

4. Defrost

3. Cool Down Achieved

Defrost:

time/temp. initiated

temp. terminated

DTh in control

*

2-min. Comp off

CTh cools to setpoint

CTh in control

setpoint
CTh above

timer starts

DH de-energized

*

25-min. max. DT starts

ConFM de-energized

*

6-hr DT starts

After DOT Delay:

Comp energized

DH energized

Comp de-energized

ConFM de-energized

Evap. Temp.

reaches 44°F (6.7°C)

*

6-hr. DT terminates

5-min. min. DT starts

EvapFM energized

Comp de-energized

ConFM energized

EvapFM de-energized

*

After FDD

EvapFM energized

Prep Table Top Sequence Flow Chart

*

*

2-min. Comp on

2. Cool Down

CTh above setpoint

timer starts

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

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

c) 5-min. minimum defrost time.

d) 25-min. maximum defrost time.

e) DOT (drip off time) 1-min. Comp/ConFM delay timer starts when defrost termination temperature is met (drip off time (DOT)).

f) FDD (fan delay after defrost) EvapFM starts once 30-sec. EvapFM delay timer terminates or DTh reaches 40

Comp energized

ConFM energized

EvapFM energized

Note: Delays

g) If evaporator temperature raises above 50°F (10°C) during the cooling cycle, 6-hr. DT resets.

1. Startup

Red LED Off

Green LED Flashes

If Red LED Flashes,

check CTh or DTh

Power on

EvapFM energized

Red LED On

(5 sec. Delay)

13

Legend:

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DH-defrost heater

DTh-defrost thermistor

EvapFM-evaporator fan motor

3. Undercounter and Work Top: Freezer

5. Defrost Termination

Defrost Termination:

Temp. achieved:

45°F (7°C) or 50°F (°10C)

DTh in control

Defrost

DH de-energized

Terminated

6-hr. or 8-hr. DT starts

*

After DOT Delay:

Comp energized

ConFM energized

MH energized

PH energized

*

After FDD

EvapFM energized

Defrost Initiation:

3. Defrost

Time/Temp achieved.

CTh warms

above

setpoint

6-hr. or 8-hr. DT terminates

Evap. temp. below 41°F (5°C)

6-hr. or 8-hr. DT terminates

Evap. temp. below 41°F (5°C)

5-min. min. DT starts

60-min. max. DT starts

DH energized

Comp de-energized

ConFM de-energized

EvapFM de-energized

MH de-energized

PH de-energized

Freezer Sequence Flow Chart

2. Cool Down Achieved

Achieved

2-min. Comp off

timer starts

Comp de-energized

ConFM de-energized

EvapFM de-energized

MH de-energized

PH de-energized

Setpoint

*

CTh in control

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

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

c) 5-min. minimum defrost time.

d) 1-hr. maximum defrost time.

e) DOT (drip off time) 3-min. Comp/ConFM delay timer starts when defrost termination temperature is met (drip off time (DOT)).

f) FDD (fan delay after defrost) EvapFM starts once 7-minute EvapFM delay timer terminates or DTh reaches 25°F (-4°C).

1. Startup/Cool Down

Red LED off

Green LED Flashes

If Red LED ashes,

check CTh or DTh

6-hr. or 8-hr. DT starts

2-min. Comp on

timer starts

Note: Delays

Comp energized

Power on

Red LED On

(5 sec. Delay)

ConFM energized

EvapFM energized

14

MH energized

PH energized

Legend:

Comp-compressor

ConFM-condenser fan motor

CTh-cabinet thermistor

DH-defrost heater

DTh-defrost thermistor

EvapFM-evaporator fan motor

MH-mullion heater

PH-perimeter heater

B1. Thermostat Control 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.

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.

See the table for default cabinet temperature control settings.

Model Default Cabinet Temperature

Control Setting

Undercounter
Worktop

Prep Table 6 34°F (1°C)

Between 4 and 5 Refrigerator: 34°F (1°C)

Approximate Default Temperature

Freezer: -5°F (-21°C)

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

establish a good neutral connection.

1. Undercounter and Worktop: Refrigerator

1) Unplug the appliance from the electrical outlet.

2) Remove the rear panel.

3) Plug the appliance back into the electrical outlet.

4) Startup/Cool Down–Temperature above setpoint. CTh closed. Comp, ConFM, and
EvapFM energize. Diagnosis: Conrm that Comp, ConFM, and EvapFM energize.
Ifnot, conrm that temperature is above setpoint and CTh is closed. Check both
terminals of CTh (BK) or (BR) to a neutral (W) for 115VAC. If 115VAC is present on
one terminal and not the other, replace CTh. If 115VAC is present on both terminals,
Check voltage at Comp, external protector, and Comp terminals. Check Comp winding
continuity. Check voltage on ConFM and EvapFM. Check ConFM and EvapFM winding
continuity and check fan blades for binding.

If Comp, ConFM, and EvapFM are energized and the cabinet temperature does not

cool down, check for a restriction in the refrigeration circuit, low refrigerant charge, or
inefficient Comp.5)

5) Cool Down Achieved–Temperature cools to setpoint. CThopens. Comp, ConFM, and
EvapFM de-energize. Note: EvapFM continues on CRMR60 and CRMR72.
Diagnosis: If temperature has cooled to setpoint and Comp and ConFM do not
de-energize, check CTh continuity. If CTh defective, replace CTh.
Note: EvapFM de-energizes with Comp on CRMR27 and CRMR48 and continues on
CRMR60 and CRMR72.

15

2. Prep Table

1) Unplug the appliance from the electrical outlet.

2) Remove the rear panel.

3) Plug the appliance back into the electrical outlet.

4) Startup/Cool Down–Temperature above setpoint. CTh closed. Comp, ConFM, and
EvapFM energize. Diagnosis: Check that Comp, ConFM, and EvapFM energize.
Ifnot, conrm that the appliance is not in a defrost cycle. DT is operating properly,
temperature is above setpoint, and CTh is closed. Check voltage on DT. In cooling,
115VAC is present on both DT terminal #1 (BK) and DT terminal #4(BK) or (BR) to a
neutral (W). If 115VAC is present on terminal #2 (R) to a neutral (W), advance DT out
of defrost cycle or replace DT. Check both terminals of CTh (BK) or (BR) to a neutral
(W) for 115VAC. If 115VAC is present on one terminal and not the other, replace CTh.
If115VAC is present on both terminals, check for voltage at Comp, external protector,
and Comp terminals. Check Comp winding continuity. Check voltage on ConFM and
EvapFM. Check ConFM and EvapFM winding continuity and fan blades for binding.
Note: CRMR60-xx and CRMR72-xx, also see "HPS Activation (CRMR60 and CRMR72
Prep Table)" below.

If Comp, ConFM, and EvapFM are energized and the cabinet temperature does not

cool down, check for a restriction in the refrigeration circuit, low refrigerant charge, or
inefficient Comp.

HPS Activation (CRMR60 and CRMR72 Prep Table): Check continuity of HPS.

If open, allow time for system pressure to equalize and HPS to reset. If HPS does
not reset, replace HPS and diagnose reason for HPS activation. Conrm ConFM is
energized and fan blade turns freely. Check that the condenser coil is not clogged or
restricted. Check that there are no restrictions in the refrigeration circuit (drier).

Conrm that the appliance location meets factory requirements:

• This appliance is not intended for outdoor use. Normal operating ambient temperature
should be within 45°F to 100°F (7°C to 38°C).

• The appliance should not be located next to ovens, grills, or other high heat producing
equipment.

6) Cool Down Achieved–Temperature cools to setpoint. CTh opens. EvapFM continues.
Comp and ConFM de-energize. Diagnosis: If cabinet temperature has cooled to
setpoint and Comp and ConFM do not de-energize, check CTh continuity. If CTh
defective, replace CTh.

7) Defrost–Defrost Initiation: DT terminates. EvapFM continues (auxiliary code C-5 and
earlier). If CTh closed, Comp and ConFM de-energize. EvapFM de-energizes (auxiliary
code C-6 and later) and DH energizes (CRMR48-xx aux. code C-7 and later. All others
aux. code D-8 and later).

Defrost Termination: DT terminates. EvapFM continues (auxiliary code C-5 and earlier).

If CTh closed, Comp and ConFM energize. EvapFM energizes (auxiliary code C-6
and later) and DHde-energizes (CRMR48-xx aux. code C-7 and later. All others aux.
code D-8 and later).

16

Diagnosis: Defrost Initiation: Manually advance DT cam to terminate DT. Conrm

Comp and ConFM de-energize or remain de-energized and on auxiliary code C-6
and later, conrm EvapFM de-energizes. For CRMR48-xx aux. code C-7 and later
and all other aux. code D-8 and later, conrm DH energizes. If not, replace DT.

Defrost Termination: Advance DT cam to terminate DT. If CTh closed, conrm Comp

and ConFM energize and on auxiliary code C-5 and earlier, conrm EvapFM
energizes. For CRMR48-xx aux. code C-7 and later and all other aux. code D-8 and
later, conrm DH de-energizes. If not, check DT voltage terminal #2(R) to a neutral
(W). If115VAC is present, replace DT.

3. Undercounter and Worktop: Freezer

4) Startup/Cool Down–Temperature above setpoint. CTh closed. Comp, ConFM,
EvapFM, PH, and MH energize. Diagnosis: Check that Comp, ConFM, EvapFM,
PH, and MH energize. If not, conrm that the appliance is not in a defrost cycle, DT is
operating properly, temperature is above setpoint, and CTh is closed. Check voltage
onDT. In cooling, 115VAC is present on both DT terminal #1 (BK) and DT terminal
#4 (BK) to a neutral (W). If 115VAC is present on terminal #2 (R) to a neutral (W),
advance DT out of defrost cycle or replace DT. Check both terminals of CTh (BK) to a
neutral (W) for 115VAC. If 115VAC is present on one terminal and not the other, replace
CTh. If 115VAC is present on both terminals, check Comp, ConFM, and EvapFM. For
CRMF48(-01)(-W)(-W01) and CRMF60(-W), also see "HPS Activation (CRMF48(-01)
(-W)(-W01) and CRMF60(-W))" below.

Check voltage at Comp, external protector, and Comp terminals. Check Comp windings.

Check voltage on ConFM and EvapFM. Check ConFM and EvapFM windings. Check
fan blades for binding.

If Comp, ConFM, and EvapFM are energized and the cabinet temperature does not

cool down, check for a restriction in the refrigeration circuit, low refrigerant charge,
inefficient Comp, or defective TXV (CRMF48(-01)(-W)(-W01) auxiliary codes A-5 and
B-5).

HPS Activation (CRMF48 and CRMF60): Check continuity of HPS. If open, allow time

for system pressure to equalize and HPS to reset. If HPS does not reset, replace HPS
and diagnose reason for HPS activation. Conrm ConFM is energized and fan blade
turns freely. Check that the condenser coil is not clogged or restricted. Check that there
are no restrictions in the refrigeration circuit (drier, TXV (auxiliary codes A-5 and B-5)).

Conrm that the appliance location meets factory requirements:

• This appliance is not intended for outdoor use. Normal operating ambient temperature
should be within 45°F to 100°F (7°C to 38°C).

• The appliance should not be located next to ovens, grills, or other high heat producing
equipment.

• A minimum of 1.5" (4 cm) overhead clearance should be provided for proper
ventilation.

5) Cool Down Achieved–Temperature cools to setpoint. CTh opens. Comp, ConFM,
EvapFM, PH, and MH de-energize. Diagnosis: If temperature has cooled to setpoint
and Comp, ConFM, EvapFM, PH, and MH do not de-energize, check CTh continuity.
IfCTh defective, replace CTh.

17

6a) Defrost

Early DT's were designed with 8-hr. interval and 20-min. defrost cycle.
Later DT's were designed with 6-hr. interval and 25-min. defrost cycle.
Manual advance in and out of defrost by turning the defrost dial is quickest way to
troubleshoot components.

Defrost Initiation: DT terminates. DH energizes. If CTh closed, Comp, ConFM,
EvapFM, PH, and MH de-energize.

Defrost Termination: DT terminates. DH de-energizes. If CTh closed, Comp, ConFM,

EvapFM, PH, and MH energize.

Diagnosis: Defrost Initiation: Manually advance DT cam to terminate DT. Conrm DH

energizes and Comp, ConFM, EvapFM, PH, and MH de-energize. If not, replace
DT. If Comp, ConFM, EvapFM, PH, and MH de-energize, check DH. Conrm DST is
closed. If not, let DH cool, then recheck DST. If DST is still open, replace DST. Check
DH amp draw and DH continuity.

Defrost Termination: Advance DT cam to terminate DT. If CTh closed, conrm Comp,

ConFM, EvapFM, PH, and MH energize. Conrm DH de-energizes. If not, check DT
voltage terminal #2 (R) to a neutral (W). If 115VAC is present, replace DT.

7) PH and MH Diagnosis: Check that PH and MH energize. Check for 115VAC at PH and
MH. If 115VAC is not present, check power supply. If 115VAC is present, check amp
draw of PH and MH. If an amp reading is not present, check the continuity of PH and
MH. If defective, replace PH or MH.

Legend: Comp–compressor; ConFM–condenser fan motor; CTh–cabinet thermostat;

DH–defrostheater; DST–defrost safety thermostat; DT–defrost timer;
EvapFM–evaporator fan motor; HPS–high-pressure switch; MH–mullion heater;
PH–perimeterheater; TXV–thermostatic expansion valve

18

B2. Thermistor/Control Module 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.

• 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.

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.

See the table for default cabinet temperature control settings.

Model Default Cabinet Temperature

Control Setting

Undercounter
Worktop

Prep Table 6 34°F (1°C)

Between 4 and 5 Refrigerator: 34°F (1°C)

Approximate Default Temperature

Freezer: -5°F (-21°C)

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.
Conrm that the appliance location meets factory requirements:

• This appliance is not intended for outdoor use. Normal operating ambient
temperature should be within 45°F to 86°F (7°C to 30°C).

• The appliance should not be located next to ovens, grills, or other high heat
producing equipment. Check CM using the steps in "II.C. Control Module Check."

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

establish a good neutral connection.

• CM has high and low voltage protection. If off on either protection, no LED is
visible and all components are off.
High Voltage: 135VAC
Low Voltage: 90VAC

• Solid red LED for 5 sec. at startup.

• Flashing green LED: Normal operation.

• Flashing red LED: check cabinet thermistor and defrost thermistor (if applicable).

• CM has a 2 min. minimum on time and 2 min. minimum off time for Comp.

1. Service Diagnosis: All Refrigerators, Prep Tables, and Freezers

1) Unplug the appliance from the electrical outlet.

2) Remove the rear panel.

19

3) Plug the appliance back into the electrical outlet. If appliance was in defrost when power
supply was disconnected, defrost is terminated and normal cooling cycle begins when
power supply is reconnected.

4) Startup/Cool Down–There is a slight delay (solid red LED for 5 sec., then ashing
green LED). Temperature above setpoint at CTh and if applicable, conrm appliance is
not in a defrost cycle (PT and Freezers). Comp, CondFM, and EvapFM energize. 2-min.
Comp on timer starts.
Freezers: PH, and MH energize.

a) CTh Diagnosis: If CTh fails, a red LED ashes along with the green LED on the CM.

Conrm CTh is properly connected to CM. Check Ohm reading of CTh. Replace as
needed.

b) TD Diagnosis: Conrm TD is set between 4 and 5. Check Ohm reading of TD.

Replace as needed.

c) CM Diagnosis: Conrm green LED is ashing. If not, check for 115VAC between

CM 2 (L) black (BK) wire and CM 3 white (W) neutral wire. If 115VAC is not present,
check power cord connections and breaker/fuse. Conrm wiring connections are
secure for both CM 2 (L) black (BK) (power supply) and CM 3 white (W) (neutral).
If 115VAC is present and green LED is not ashing, replace CM.

d) Comp/CondFM Diagnosis: Check that Comp and ConFM energize. If not, conrm

that the temperature is above setpoint. Next, check for 115VAC at CM (C) 1 brown
(BR) wire to neutral (W) wire. If 115VAC is not present, replace CM. If 115VAC is
present, check HPS continuity (if applicable). See "f) HPS Activation" below.
Comp: If 115VAC is present, check Comp external overload, start cap, start relay, and
Comp motor windings. Replace as needed.
CondFM: If 115VAC is present, check fan blade for binding, then check ConFM motor
windings.

e) EvapFM Diagnosis: Check that EvapFM(s) energize. If not, check for 115VAC at

CM (F) 5 dark blue (DBU) wire to neutral (W) wire. If 115VAC is not present, replace
CM. If 115VAC is present, check fan blades for binding, then check EvapFM motor
windings.

f) HPS Activation (CRMR60 and CRMR72 Prep Table and Freezer Models):

Check continuity of HPS. If open, allow time for system pressure to equalize and
HPS to reset. If HPS does not reset, replace HPS and diagnose reason for HPS
activation. Conrm ConFM is energized and fan blade turns freely. Check that the
condenser coil is not clogged or restricted. Check that there are no restrictions in the
refrigeration circuit (drier).

g) PH and MH Diagnosis (Freezer only): PH and MH follow Comp operation. When

Comp is energized, PH and MH are energized. If 115VAC is present, check amp draw
of PH and MH. If an amp reading is not present, check the continuity of PH and MH.
If defective, replace PH or MH.

If Comp, ConFM, and EvapFM are energized and the cabinet does not cool down,

check for a restriction in the refrigeration circuit, low refrigerant charge, or inefficient
Comp.

20

5) Cool Down Achieved–Temperature cools to setpoint. Comp and ConFM de-energize.
UC/WT Refrigerators and Freezers: EvapFM de-energizes.
Prep Table: EvapFM continues.
Diagnosis: If temperature setpoint achieved and Comp, ConFM, and EvapFM(except
PT models) does not de-energize, check CTh and TD continuity. If CTh or TD is
defective, replace. If CTh and TD are good and either the Comp, ConFM, and/or
EvapFM (except PT models) continue, or if EvapFM on PT models de-energizes,
replace CM.

6) Defrost–Manually initiated defrost, off cycle defrost, and time-initiated
temperature-terminated heated defrost.

1a) Manually-Initiated (All): Turn the TD all the way to the right. Wait 1 to 3 sec. then

back to original setting. Defrost initiated. If defrost does not initiate, wait 1 to 2 min.
and repeat process.

1b) Off Cycle-Initiated (UC/WT Refrigerators): Off cycle between cooling cycles.

CTh cools below TD setting. TD setting satised. Comp, CondFM, and EvapFM
de-energize.

1c) Time-Initiated (Heated) (Prep Table and All Freezers): 6-hr. DT terminates.

(1) Prep Tables: Comp and ConFM de-energizes, EvapFM continues. DH energizes.

5-min. minimum DT starts and 25-min. maximum DT starts.

(2) Freezers: Comp, ConFM, PH, MH, and EvapFM de-energize. DH energizes.

5-min. minimum DT starts and 1-hr maximum DT starts.

Note: When DTh is above 50°F on Prep Tables or above 41°F on Freezers, defrost

will not initiate and 6-hr. DT resets and starts once DTh temperature cools
below 50°F on Prep Tables and cools below 41°F on Freezers.

2a) Manually-Terminated: Turn the TD all the way to the right. Wait 1 to 3 sec. then

back to original setting. Defrost terminated. If DH continues or Comp does not
energize, make several more attempts of manual termination.

2b) Off Cycle-Terminated: CTh warms above TD setting. Comp, CondFM, EvapFM

energize.

2c) Temperature-Terminated: DTh achieves termination temperature or backup DT

terminates.

(1) Prep Tables: 44

°F achieved or 25-min. backup DT terminates. DH de-energizes.

IfCTh calling for cooling, 1-min. Comp delay timer starts (drip time) and 90-sec.
EvapFM delay timer starts. 1-min. Comp delay timer terminates. Comp and
ConFM energize. 30 sec. later, 90-sec. EvapFM delay timer terminates and
EvapFM energizes.
Note: If DTh achieves 40°F before 90-sec. EvapFM delay timer terminates,
90-sec. EvapFM delay timer terminates and EvapFM energizes.

(2) Freezers: 45°F achieved or 1-hr. DT terminates. DH de-energizes. If CTh calling

for cooling, 3-min. Comp delay timer starts (drip time) and 7-min. EvapFM delay
timer starts. 3-min. Comp delay timer terminates. Comp and ConFM energize. 4
min. later, 7-min. EvapFM delay timer terminates and EvapFM energizes.
Note: If DTh achieves 25°F before 7-min. EvapFM delay timer terminates, 7-min.
EvapFM delay timer terminates and EvapFM energizes.

21

Defrost Diagnosis:

1) Manual-Initiation or Time-Initiation: TD rotated to max. position and back or
6-hr. or 80hr. DT terminates. After rotating TD several times and defrost still not
activated, wait 1 to 2 min. and repeat process. Replace TD as needed.

(2) CM Diagnosis: Conrm DH energizes (if applicable) and Comp, ConFM, and

EvapFM (if applicable) de-energize. If not, replace CM.

(3) Comp and ConFM Diagnosis: Conrm Comp and ConFM de-energize. If not,

check for 115VAC at CM 1 (C) (BR) to neutral (W). If 115VAC is present, Check
DTh continuity. Replace as needed. If DTh conrmed, replace CM.

(4) EvapFM (if applicable): Conrm EvapFM de-energizes. If not, check for 115VAC

at CM 5 (F) (DBU) to neutral (W). If 115VAC is present, conrm Comp and ConFM
de-energized. Next, check DTh continuity. Replace as needed. If DTh conrmed,
replace CM.

2) Off Cycle Defrost: Off cycle defrost. Has CTh warmed above temperature setpoint?
If not, conrm CTh continuity. Replace as needed. If CTh conrmed, replace CM.

3) Heated Defrost Diagnosis: Initiation; Conrm Comp is energized, then manually
initiate defrost. Rotate TD all the way to the right. Wait 1 to 5sec. then rotate back
to original setting. Defrost initiated.

a) Prep Table: Check that Comp and ConFM de-energize. DH energizes.

EvapFMcontinues.

b) Freezer: Check that Comp, ConFM, PH, MH, and EvapFM de-energize.

DHenergizes.

(1) TD: If Comp and ConFM continue, wait 1 to 2 min. and make several more

attempts of manual initiation. Ifmanual initiation fails, replace TD.
(2) CM: If TD conrmed and Comp and ConFM continue, replace CM.
(3) DH: If Comp and ConFM de-energize, check that DH energizes. Check for

115VAC at CM 4 (H) (R) to CM 3 (N) (W). If 115VAC is not present, replace CM.

If115VAC is present, and DH is not energized, check for 115VAC at DTS black (B)

wire to any white (W) neutral wire. If 115VAC is not present, DTS is open. Let cool

and reset. If DTS does not reset (close), replace DTS. If 115VAC is present, check

continuity of DH. Replace as needed.

4) Heated Defrost Diagnosis: Termination;
a) Prep Table

(1) DTh: DTh warms to 44°F (6.6°C). DH de-energizes. Conrm continuity of DTh.
Replace as needed. If DTh is good and DH continues after DTh achieves 44°F
(6.6°C), replace CM.

b) Freezer

(1) DTh: DTh warms to 45°F. (7°C) DH de-energizes. Conrm continuity of DTh.
Replace as needed. If DTh is good and DH continues after DTh achieves 45°F
(7°C), replace CM.

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

CTh–cabinet thermistor; TD–temperature dial; DH–defrostheater; DST–defrost
safety thermostat; DT–defrost timer; DTh–defrost thermistor; EvapFM–evaporator
fan motor; HPS–high-pressure switch; MH–mullion heater; PH–perimeterheater

22

C. Defrost Timer Check

The defrost timer (DT) starts once the appliance in plugged into the electrical outlet.
There are 2 possible interval and defrost cycle times: 8-hr./20min. and 6-hr./25min.

1. Defrost Timer

Before replacing a DT that does not show a visible defect and that you suspect is bad,
conduct the folowing check procedure. This procedure will help you verify your diagnosis.
Always choose a neutral (W) to establish a good power supply and neutral connection to
DT: 115VAC at DT 1 (BK) to DT 3 (W).

2. Normal Operation

DT 8-hr. or 6-hr. interval timer starts. DT switch (internal) closed between DT 1 (BK)
and DT 4 (BK or BR) and open between DT 1 (BK) and DT 2 (R). Once DT terminates
DT switch (internal) opens. DT switch (internal) opens between DT4 (BK or BR) and
DT1(BK) and closes between DT 1 (BK) and DT 2 (R).
Diagnosis: In normal operation, Comp, ConFM, and EvapFM energized, check for
115VAC between DT1(BK) and neutral (W). Next, check for 115VAC at DT4 (BK or
BR) and neutral (W). If 115VAC is not present between DT4 (BK or BR) and neutral
(W) (Comp, ConFM, and EvapFM de-energized), check for 115VAC between DT 2 (R)
and neutral (W). If 115VAC is not present between DT4 (BK or BR) and neutral (W) or
between DT 2 (R) and neutral (W), DT switch (internal) defective. Replace DT. If 115VAC
is present between DT4 (BK or BR) and neutral (W) (Comp, ConFM, and EvapFM
energized), advance the cam dial on DT until it clicks (defrost initiated). Comp, ConFM,
and EvapFM de-energize. If not, replace DT. Next, check for 115VAC between DT 2 (R)
and neutral (W). If 115VAC is not present, replace DT.
Off Cycle Defrost: If 115VAC is present, off cycle defrost initiated and 20-min. or 25-min.
DT starts. After 20-min. or 25-min. defrost cycle terminates, Comp, ConFM, and EvapFM
energize. If not, replace DT.
Heated Defrost: If 115VAC is present, DH energized and 20-min. or 25-min. DT starts.
Once DST achieves termination temperature, DH de-energized. After 20-min. or 25-min.
defrost cycle terminates, Comp, ConFM, and EvapFM energize. If not, replace DT.

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

CTh–cabinet thermistor; TD–temperature dial; DH–defrostheater; DST–defrost
safety thermostat; DT–defrost timer; DTh–defrost thermistor; EvapFM–evaporator
fan motor; HPS–high-pressure switch; MH–mullion heater; PH–perimeterheater

23

D. Control Module Check

1. Control Module

Before replacing a 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 power supply and neutral connection to
CM: 115VAC at CM 2 (L) (BR)

2. Startup/Cool Down

At startup, CM displays a solid red LED for 5 sed. After 5 sec. CM turns red LED off and
begins ashing a green LED. This is normal operation. If a red LED ashes (fault code),
check CTh or DTh for continuity and good connection to CM.

1) Check all wiring connections.

2) Be sure the power supply is connected to the electrical outlet.

3) Conrm the CTh and DTh are properly connected (no red LED ashing). A Red LED
turns on for 5 sec. at startup. After 5 sec. the red LED turns off and a green LED starts
ashing. This is normal operation. If the red LED starts ashing, check CTh and DTh
continuity. Replace as needed.

4) Check that Comp, ConFM, and EvapFM energize (PH and MH on freezers). If not check
CTh status. If CTh ohm reading is in proper range,
Comp and ConFM and PH and MH (freezers); check for 115VAC at CM 1 (C) (BR)
to neutral (W). If 115VAC is not present, replace CM. If 115VAC is present and Comp
energized and ConFM did not, check ConFM blades for binding and motor winding
continuity. If PH or MH (freezers) does not energize, check continuity, replace as
needed.
EvapFM; 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 motor winding
continuity.

3. Defrost initiation

5) Manual Defrost Check: Turn the TD all the way to the right. Wait 1 to 3 sec. then back
to original setting. Defrost initiated. If Comp and ConFM continue, wait 1 to 2 min. and
repeat process of manual initiation. If Comp remains energized, replace CM.

6) Conrm Comp, ConFM, EvapFM (UC/WT refrigerator and freezer), PH and MH
(freezers) de-energize. If not, for Comp, ConFM and PH and MH (freezers), check for
115VAC at CM 1 (C) (BR) to neutral (W) and for EvapFM (if applicable) CM 5 (F) (DBU)
to neutral (W). If 115VAC is present, replace CM. Note: EvapFM continues on Prep Table
models.

7) Heated Defrost: Conrm DH energizes. Check for 115VAC at CM 4 (H) (R) to neutral
(W). If 115VAC is not present, replace CM.

4. Defrost Termination

8) Check that all components restart after defrost termination.

a) UC/WT Refrigerator: CTh above setpoint. Cool cycle starts. Comp, ConFM, and

EvapFM energize.

24

b) Prep Table: DTh warms to 44°F (6.6°C). DH de-energizes. Conrm continuity of

DTh. Replace as needed. If DTh is good and DH continues after DTh achieves
44°F (6.6°C), replace CM.

c) Freezer: DTh warms to 45°F (7°C) or 50°F (10°C). DH de-energizes. Conrm

continuity of DTh. Replace as needed. If DTh is good and DH continues after DTh
achieves 45°F (7°C) or 50°F (10°C), replace CM.

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

CTh–cabinet thermistor; DH–defrost heater; DTh–defrost thermistor;
EvapFM–evaporator fan motors, MH–mullion heater; PH–perimeter heater

25

E. Diagnostic Table

Before consulting the diagnostic tables, check the following:

• Check the cabinet temperature control setting. See the table for default cabinet
temperature control settings.

Model Default Cabinet Temperature

Control Setting

Undercounter
Worktop

Prep Table 6 34°F (1°C)

Between 4 and 5 Refrigerator: 34°F (1°C)

Approximate Default Temperature

Freezer: -5°F (-21°C)

• Make sure the doors are not left open or opened too often and that they are sealing
properly.

• On prep tables, pans and rail dividers must be in place. Otherwise, the rail will not cool
properly.

• Make sure product is not blocking airow and that the cabinet is not overloaded with
warm or hot product. Product should be allowed to cool before putting in the appliance.
On prep tables, only load ingredients that have been pre-chilled to 37°F (3°C) or less.

• Check for correct installation and proper voltage per appliance nameplate. This
appliance is not intended for outdoor use. Normal operating ambient temperature:
– Undercounter and Worktop 45°F to 100°F (7°C to 38°C)
– Prep Table 45°F to 86°F (7°C to 30°C)

• The appliance should not be located next to ovens, grills, or other high heat producing
equipment. A minimum of 1.5" (38 mm) overhead clearance is required for proper
ventilation.

1. Appliance Not Cooling

Appliance Not Cooling - Possible Cause

Power Supply

1.

Power Supply Cord and Plug

2.

Wiring

3.

Cabinet Thermostat or Cabinet

4.

Thermistor
Cabinet Temperature Dial

5.

Defrost Timer or Control Module

6.

(if applicable)

Evaporator Fan Motor

7.

Condenser Fan Motor

8.

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

a)

Loose connection.

b)

Not within specications.

c)

Loose connection.

a)

Defective.

b)

Loose connection or open.

a)

Faulty.

b)

Loose, disconnected, or defective.

a)

Loose, disconnected, or defective.

a)

Defrost timer defective. If applicable.

a)

Control module in alarm (red LED ashing). If applicable.

b)

Control module defective. If applicable.

c)

Defective.

a)

Fan blade binding.

b)

Defective.

a)

Fan blade binding.

b)

26

Appliance Not Cooling - Possible Cause

Compressor External Protector

9.

a)
b)
c)
d)
e)

f)

Compressor

10.

Condenser

11.

Evaporator

12.

Refrigerant/Refrigerant Lines

13.

a)
a)
a)
a)
b)

High-Pressure Switch

10.
(if applicable)

a)

b)

c)

d)

e)

f)

Thermostatic Expansion Valve

11.

(not adjustable)
CRMF48(-01)(-W)(-W01)
(auxiliary codes A-5 and B-5)

a)

Dirty condenser.

Condenser fan motor not operating.

Defective.

Start relay defective.

Low charge.

Start capacitor (if applicable) defective.

Defective.

Dirty.

Dirty or frozen up.

Gas leak.

Refrigerant lines or components restricted.

Dirty condenser.

Ambient temperature too warm.

Condenser fan motor not operating.

Refrigerant overcharge.

Refrigerant lines or components restricted.

Bad contacts.

Defective.

2. Evaporator is Frozen Up

Evaporator is Frozen Up - Possible Cause

Evaporator

1.

Evaporator Fan Motor

2.

Refrigerant Charge

3.

Defrost Heater (if applicable)

4.

Defrost Timer or Control Module

5.

(if applicable)
Defrost Safety Thermostat Open

6.

(if applicable)
Thermostatic Expansion Valve

7.

(not adjustable)
CRMF48(-01)(-W)(-W01)
(auxiliary codes A-5 and B-5)

Dirty.

a)

Defective.

a)

Fan blade binding.

b)

Low.

a)

Defective.

a)

Defective.

a)

Defective.

a)

Defective.

a)

3. Defrost Fails to Initiate or Terminate

Defrost Fails to Initiate or Terminate - Possible Cause

Defrost Thermistor (if applicable)

1.

Defrost Timer or Control Module

2.

(if applicable)
Defrost Heater (if applicable)

3.

Defective.

a)

Defective.

a)

Defective

a)

27

III. Controls and Adjustments

A. Temperature Settings

1. Temperature Reading

A thermometer with both °F and °C scales is mounted in the cabinet. See Fig. 1.

2. Cabinet Temperature

The appliance features a cabinet temperature control dial (TD). The warmest setting
is 1and the coldest setting is 7. See the table for default cabinet temperature control
settings.

Model Default Cabinet Temperature

Control Setting

Undercounter
Worktop

Prep Table 6 34°F (1°C)

Between 4 and 5 Refrigerator: 34°F (1°C)

Approximate Default Temperature

Freezer: -5°F (-21°C)

Fig. 1

Warmer Colder

Cabinet Temperature
Control Dial

B. Defrost

There are 2 types of defrost: Off Cycle Defrost and Heated Defrost.

Manual Initiation (All Models): Turn the TD all the way to the right. Wait 3 sec. then

back to original setting. Defrost initiated.

Automatic Initiation: 8-hr. or 6hr. Defrost timer terminates.
Manual Termination: Turn the TD all the way to the right. Wait 3 sec. then back to

original setting. Defrost terminated.
Automatic Termination: Cabinet temperature above setpoint, or defrost thermistor
above termination temperature, or back defrost timer terminates.

Thermometer

1. Undercounter and Worktop Refrigerators

Off-cycle defrost between run cycles.

28

2. Prep Table and Freezer

Time-Initiated Defrost Cycle: 20-min. or 25-min. defrost cycle once every 8 or 6 hrs. (25/8
or 20/6). Defrost cycle initiation and termination are controlled by the defrost timer or
control module and defrost thermistor.

Prep Table Refrigerators: The evaporator fan motor remains energized and all other
components de-energize during the defrost cycle.

Freezers: The defrost heater energizes and all other components de-energize during the
defrost cycle. There is an in-line defrost safety thermostat.

a) Defrost Timer Defrost:
To initiate a manual defrost cycle follow the steps below.

1) Make sure the appliance is unplugged, then
remove the rear panel. See Fig. 2.

Defrost
Timer Cam

2) Rotate the defrost timer cam clockwise until
it clicks. When the appliance is plugged
in it will start a 20-min. or 25-min. defrost

Fig. 2

cycle. To bypass the defrost cycle and start
at the beginning of an 8-hr. or 6 hr. interval,
rotate the defrost timer cam clockwise until

nd

it clicks a 2

time.

Rear Panel

3) Replace the rear panel in its correct position.

4) Plug the appliance into the electrical outlet.

b) Control Module with Defrost Thermistor Defrost:
To initiate a manual defrost cycle follow the steps below.

1) Rotate TD all the way to the right. Wait 1 to 5sec. then rotate back to original setting.
Defrost initiated. See Fig. 3.

2) Repeat step 1 to terminate defrost.

Fig.3

29

C. Safety Devices

1. Compressor External or Internal Protector (All Models)

If combined temperature/amperage value is above the limit specied by the
compressor manufacturer, the compressor protector operates independently to turn
off the compressor. The compressor protector de-energizes the compressor until the
temperature/amperage value returns to an acceptable level.

2. 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.

D. Perimeter and Mullion Heaters

Freezers are equipped with perimeter and mullion heaters. If condensation occurs,
check continuity of heaters.

30

IV. Refrigeration Circuit and Component Service Information

WARNING

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

• 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. Refrigeration Circuit Service Information

WARNING

• Repairs requiring the refrigeration circuit to be opened must be performed by
properly trained and EPA-certied service personnel.

• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the system (if using an electronic leak detector), and then raise
the pressure using nitrogen gas (140 PSIG). Do not use R-134a 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-134a 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).

1. Refrigerant Recovery

No refrigerant access valves are provided on this appliance. Using proper refrigerant
practices, utilize a temporary tap-line valve on the high side to recover the refrigerant.
Store the refrigerant in an approved container. Do not discharge the refrigerant into the
atmosphere.
After recovery is complete, replace the tap-line valve with a proper, permanent access
valve.

31

2. Brazing

WARNING

• R-134a itself is not ammable at atmospheric pressure and temperatures up to
212°F (100°C).

• R-134a itself is not explosive or poisonous. However, when exposed to high
temperatures (open ames), R-134a can be decomposed to form hydrouoric
acid and carbonyl uoride both of which are hazardous.

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

• 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-134a as a mixture with
pressurized air for leak testing.

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

2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the system (if using an electronic leak detector), and then raise
the pressure using nitrogen gas (140 PSIG). Do not use R-134a as a mixture with
pressurized air for leak testing.

3. Evacuation and Recharge (R-134a)

1) Attach a vacuum pump to the system. Be sure the high-side charging hose is connected
to the eld-installed high-side access valve.

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 high-side valve on the gauge manifold. Never
allow the oil in the vacuum pump to ow backwards.

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

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

32

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. See the nameplate for the required refrigerant charge. Hoshizaki recommends
only virgin refrigerant or reclaimed refrigerant which meets the requirements of ARI
Standard 700 (latest edition) be used.

6) A liquid charge is recommended when charging an R-134a system. Place the service
cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the
service cylinder, then place it on the scales. Open the high-side valve on the gauge
manifold.

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

8) Close the high-side valve on the gauge manifold, then close the refrigerant access valve
(if applicable). Disconnect the gauge manifold hose.

9) Cap the access valve to prevent a possible leak.

B. Component Service Information

NOTICE

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

Component Notes

Compressor 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
CRMF48(-01)
(-W)(-W01)
(auxiliary codes
A-5 and B-5)

• 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.

33

C. Door Reversal

This 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, follow the steps below. Example shows change from right hinged
to left hinged.

WARNING

• Wear eye protection when reversing the doors.

• Keep ngers away from edge of upper hinge bracket. Spring cartridge can cause
the upper hinge bracket to move suddenly with extreme force.

Door and Lower Hinge Removal and Relocation

1) Remove all items from the appliance. Make sure the appliance is unplugged from the
electrical outlet. Move the appliance out for ease of access then lock the casters.

2) With the door closed, loosen, but do not remove, the upper hinge bracket outer screw.
See Fig. 4. Next, open the door to the fully open position and remove the upper hinge
bracket inner screw. See Fig. 5.

3) Slide the upper hinge bracket out from under the outer screw and remove the door.

WARNING! Keep away from upper hinge bracket. Upper hinge bracket may spring
closed.

4) Replace the upper hinge bracket inner screw in its original position and tighten, then
tighten the upper hinge bracket outer screw.

Upper Hinge Bracket

WARNING! Upper
hinge bracket may
spring closed

Upper Hinge
Bracket

Upper Hinge Bracket
Outer Screw

Door Closed

Fig. 4

Upper Hinge
Bracket Inner
Screw

Door Fully Open

Fig. 5

5) Remove the lower hinge bracket. See Fig. 6. Be sure to leave the thrust washer in place.

6) Clear the foam from the lower hinge bracket mounting holes prior to securing lower
hinge bracket in its new location. Install the lower hinge bracket in its new location.
Besure the lower hinge bracket is pushed all the way in and the thrustwasher is in its
original position.

Thrust
Washer

Lower Hinge
Bracket
Mounting Holes

Lower Hinge Bracket

Thrust Washer

Lower Hinge Bracket

Bolts

Fig. 6

34

Bolts

Upper Hinge Bracket Removal and Spring Cartridge Relocation

7) While preventing the upper hinge bracket from rotating, remove the upper hinge bracket
from the spring cartridge. See Fig. 7. Note which side of the upper hinge bracket is
facing up.

8) Remove the ller cap, ller screws, and spring cartridge. See Fig. 16. Leave the thrust
washers in place on the spring cartridge. NOTICE! Spring cartridge may be difficult
to remove. Be careful not to damage the nish. See Fig. 8.

Upper Hinge
Bracket

Screw

Washer

Door

Filler Screws

Filler Cap

Door

Screws

Thrust Washers

Spring Cartridge

Fig. 7

Fig. 8

9) Clear foam from the spring cartridge hole to allow for spring cartridge installation.
See Fig. 9. Install the spring cartridge in its new location. Reinstall the ller cap and ller
screws on the opposite side of the door.

Screws

Spring Cartridge

Spring Cartridge Hole

Filler Screws

Door

Filler Cap

Fig. 9

Lower Door Prep and Upper Hinge Bracket Relocation

10) Remove the ller cap and nylon bearing from the bottom of the door. SeeFig.10.
Reinstall on the opposite side.

11) Make sure the thrust washers are in place on the spring cartridge, then ip the upper
hinge bracket over from its original position and install onto the spring cartridge in
the door open position. See Fig. 11. The upper hinge bracket should be positioned as

Filler Cap

shown.

Fig. 10

Upper Hinge
Bracket Outer
Screw Slot

Nylon Bearing

Screw

Washer

Upper Hinge
Bracket Inner
Screw Hole

Upper Hinge Bracket

Thrust Washers

Inside of
Door

Fig. 11

35

Door Installation

12) Remove the black plastic ller cap located from the hole above where the spring
cartridge screw will line up. Note: The black plastic ller cap is not reusable.

13) Remove the upper hinge bracket screws from the new location and apply Loctite
Threadlocker Blue 242 or 243 to the threads. Next, start the upper hinge bracket
outer screw into the appliance. Rotate a few threads into the appliance; do not tighten
thescrew. See Fig. 12.

Upper Hinge Bracket
Outer Screw

Black Plastic Filler Cap

Upper Hinge
Bracket Inner
Screw

Upper Hinge
Bracket Outer
Screw

Fig. 12

14) Be sure the lower hinge bracket thrust washer is in place, then place the door on the
lower hinge bracket in the fully open position. Slide the door upper hinge bracket outer
slot onto the upper hinge bracket outer screw. See Fig. 13.

15) Install the upper hinge bracket inner screw and tighten.

Upper Hinge Bracket

Upper Hinge
Bracket

Outer Screw

Upper Hinge
Bracket Outer
Screw

Upper Hinge
Bracket

WARNING! Upper
hinge bracket may
spring closed

Door Fully Open

Lower Hinge Bracket

Thrust
Washer

Fig. 13

36

Upper Hinge
Bracket Inner
Screw

Door Fully Open

16) Close the door and tighten the upper hinge bracket outer screw.
See Fig. 14.

Upper Hinge Bracket
Outer Screw

Upper Hinge
Bracket

Door Fully Closed

Fig. 14

17) Check the door operation to assure it opens and closes properly. Note: Hold door at
45°angle from closed position and release. Door should close on its own. If not, adjust
hinge bracket.

18) Unlock the casters and move the appliance back into its original position. Lock the
casters once in position, then plug the appliance back into the electrical outlet. Allow the
appliance to cool down prior to putting product back in.

D. Door/Drawer Location Reversal

The appliance is provided with a cabinet design which, after being delivered to the
installation location, permits changing of the drawer and door locations. To change the
drawer and door locations, follow the steps below. Example shows CRMR48-D2.

WARNING

• Wear proper PPE (personal protection equipment) when executing these
procedures (safety glasses and gloves).

• Keep ngers away from edge of upper hinge bracket. Spring cartridge can cause
the upper hinge bracket to move suddenly with extreme force.

Drawer and Drawer Frame Removal

1) Remove all items from the appliance. Make sure the appliance is unplugged from the
electrical outlet. Move the appliance out for ease of access then lock the casters.
See Fig. 15.

Model Shown: CRMR48-D2

Casters

Fig. 15

37

2) Remove the drawers. Pull the drawer out to its fully extended position. Open the safety
clips (one on each side) by sliding them forward, then rotating them up. See Fig. 16.
Lift up on the handle slightly, then pull to disengage the drawer. Be sure to support the
rear and front of the drawer while removing it. WARNING! Be sure to close the safety

clips when reinstalling the drawer.

Safety Clip

Closed

Safety Clip

Open

Safety Clips

Drawer
Slides

Upper Drawer

Lower Drawer

Fig. 16

3) Remove the 4 horizontal mullion screws, then cut the horizontal mullion silicone loose
and remove the horizontal mullion. See Fig. 17.

Horizontal Mullion Screws

Horizontal Mullion Silicone

Horizontal Mullion
Silicone

Horizontal Mullion

Fig. 17

38

4) Remove the hex-bolts from the 2 right (front and rear) and 2 left (front and rear) brackets
(2 hex-bolts per bracket), then remove the right and left drawer frames. See Fig. 18.

Right Drawer Frame

Right Rear
Hex-Bolts

Right Front
Hex-Bolts

Left
Rear
Bracket

Left Drawer Frame

Right
Rear
Bracket

Right Front
Bracket

Right Drawer Frame

Right
Rear
Bracket

Right Front
Bracket

Left Drawer
Frame

Left Front
Bracket

Fig. 18

Left
Rear
Bracket

Left Rear
Hex-Bolts

Left Front
Hex-Bolts

Left Drawer
Frame

Left Front
Bracket

Left
Rear
Bracket

Left Front
Bracket

Right Drawer
Frame

Right Front
Bracket

Right
Rear
Bracket

39

Pilaster and Inner Brackets Relocation

5) Remove the shelf from the door section, then remove the pilasters.
See Fig. 19.

Right Side Pilasters

Vertical Mullion

Shelf

Center Rear
Drawer Frame
Bracket

Center Rear
Pilaster

Vertical Mullion
Pilaster

Fig. 19

6) Remove the center rear drawer frame bracket and the ller screw. See Fig. 20. Slide the
center rear drawer frame bracket over to the new location and secure it. Place the ller
screw in the former center rear drawer frame bracket hole.

New Center
Rear Drawer
Frame Bracket
Location

Center Rear
Drawer Frame
Bracket

Filler Screw

Filler Screw

Center Rear
Drawer Frame
Bracket

Fig. 20

7) Remove the vertical mullion bracket. Rotate 180 degrees and mount it in the vertical
mullion right mounting holes. See Fig. 21.

Vertical Mullion Bracket Rotation

Vertical Mullion Left
Mounting Holes

Vertical Mullion
Bracket

Vertical Mullion

Vertical
Mullion
Bracket

Fig. 21

Vertical Mullion
Bracket

Vertical Mullion
Right Mounting
Holes

Vertical Mullion

40

8) Place and secure the pilasters and shelf support clips in their new location. See Fig. 22.
Replace the shelf.

Center Rear
Pilaster

Left Side Pilasters

Vertical Mullion Pilaster

Vertical Mullion

Center Rear Drawer
Frame Bracket

Vertical Mullion
Bracket

Fig. 22

Door Relocation

9) With the door closed, loosen, but do not remove, the upper hinge bracket outer screw.
See Fig. 23. Next, open the door to the fully open position and remove the upper hinge
bracket inner screw. See Fig. 24.

10) Slide the upper hinge bracket out from under the outer screw and remove the door.

WARNING! Keep away from upper hinge bracket. Upper hinge bracket may spring
closed.

11) Replace the upper hinge bracket inner screw in its original position and tighten, then
tighten the upper hinge bracket outer screw.

Upper Hinge Bracket

Fig. 24

Upper Hinge Bracket

Upper Hinge
Bracket Outer
Screw

Door Closed

Fig. 23

WARNING! Upper
hinge bracket may
spring closed

Upper Hinge
Bracket Inner
Screw

Door Fully Open

41

12) Remove the lower hinge bracket. See Fig. 25. Be sure to leave the thrust washer in
place.

13) Install the lower hinge bracket in its new location. Be sure the lower hinge bracket is
pushed all the way in and the thrust washer is in its original position.

Lower Hinge

Thrust
Washer

Bracket
Mounting Holes

Lower Hinge Bracket

Thrust Washer

Lower Hinge Bracket

Bolts

Fig. 25

Bolts

14) Remove the black plastic ller cap located from the hole above where the spring
cartridge screw will line up. Note: The black plastic ller cap is not reusable.

15) Remove the upper hinge bracket screws from the new location and apply Loctite
Threadlocker Blue 242 or 243 to the threads. Next, start the upper hinge bracket
outer screw into the appliance. Rotate a few threads into the appliance; do not tighten
thescrew. See Fig. 26.

Upper Hinge

Upper Hinge Bracket
Outer Screw

Upper Hinge
Bracket Inner
Screw

Black Plastic Filler Cap

Bracket Outer
Screw

Fig. 26

16) Be sure the lower hinge bracket thrust washer is in place, then place the door on the
lower hinge bracket in the fully open position. Slide the door upper hinge bracket outer
slot onto the upper hinge bracket outer screw. See Fig. 27.

17) Install the upper hinge bracket inner screw and tighten.

Upper Hinge
Bracket

Upper Hinge
Bracket Outer
Screw

Thrust Washer

Lower Hinge
Bracket

WARNING! Upper
hinge bracket may
spring closed

Upper Hinge
Bracket Inner
Screw

Door Fully
Open

Door Fully Open

Fig. 27

42

Upper Hinge
Bracket

Upper Hinge
Bracket Outer
Screw

18) Close the door and tighten the upper hinge bracket outer screw. See Fig. 28.

Upper Hinge Bracket

Door Fully Closed

Upper Hinge Bracket
Outer Screw

Fig. 28

19) Check the door operation to assure it opens and closes properly. Note: Hold door at
45°angle from closed position and release. Door should close on its own. If not, adjust
hinge bracket.

Drawer Relocation

Left Drawer Frame Relocation

20) Place the left rear bracket in place on the center rear drawer frame bracket with
hex-bolts removed in step4. Leave loose, do not tighten at this time. See Fig. 36.

21) Place the left front bracket in place on the vertical mullion bracket with the hex-bolts
removed in step 4. See Fig. 29. Leave loose, do not tighten at this time.

Fig. 29

Center Rear
Drawer Frame
Bracket

Left Rear
Bracket

Hex-Bolts

Center Rear
Drawer Frame
Bracket

Left Rear
Bracket

Vertical
Mullion

Vertical Mullion
Bracket

Left Front Bracket

43

Vertical
Mullion

Vertical Mullion
Bracket

Left Front Bracket

22) Place the left drawer frame in the appliance and align under the left rear bracket and
tighten, then align under the left front bracket and tighten. See Fig. 30.

Note: Be sure the left drawer frame is under both the left rear bracket lip and left front

bracket lip.

Left Rear Bracket Lip

Left Drawer Frame

Left Front Bracket Lip

Fig. 30

Right Drawer Frame Relocation

23) Place the right rear bracket in place on the right side panel with the hex-bolts removed
in step4. Leave loose, do not tighten at this time. See Fig. 31.

24) Place the right front bracket in place on the right side panel with the hex-bolts removed
in step4. Leave loose, do not tighten at this time. See Fig. 31.

Hex-Bolts

Right Rear
Bracket

Right Front Bracket

Vertical
Mullion

Fig. 31

44

Right Rear
Bracket

Right Front Bracket

Vertical
Mullion

25) Place the right drawer frame in the appliance and align under the right rear bracket and
tighten, then align under the right front bracket and tighten. See Fig. 32.

Note: Be sure the right drawer frame is under both the right rear bracket lip and right

front bracket lip.

Right Rear
Bracket Lip

Right Front
Bracket Lip

Right Drawer Frame

Fig. 32

45

Horizontal Mullion Replacement

26) Place the horizontal mullion in its correct position and secure with screws removed in
step3.

27) Place a bead of food grade silicone down the 2 outside vertical gaps between the
mullion and appliance. See Fig. 33.

Model Shown: CRMR48-D2

Silicone Location for
Horizontal Mullion

Fig. 33

Horizontal Mullion

Silicone Location for
Horizontal Mullion

46

28) Place the lower drawer in the lower drawer slides and the upper drawer in the upper
drawer slides. See Fig. 34. WARNING! Be sure to close the safety clips when

reinstalling the drawer.

29) Make sure all gaskets are making good contact. Using a ashlight, check that there are
no openings around all gaskets.

30) Unlock the casters and move the appliance back into its original position. Lock the
casters once in position, then plug the appliance back into the electrical outlet. Allow the
appliance to cool down prior to loading it with food products.

Model Shown: CRMR48-D2

Fig. 34

47

V. Preparing the Appliance for Periods of Non-Use

When shutting down the appliance for periods of non-use, follow the instructions below.

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.

48

VI. Disposal

When disposing of the appliance, follow the instructions below.

WARNING

Remove the door to reduce the risk of children getting trapped. Leave the shelves in
place so that children may not easily climb inside.

This 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.

49

VII. Technical Information

A. Electrical and Refrigerant Data

Design

Pressure

AC Supply

Model (includes drawer models)

CRMR27 Undercounter, Worktop, and Prep Table 115/60/1 2.6 290 120 5.6
CRMF27 Undercounter and Worktop 115/60/1 3.4 310 120 5.0
CRMR36 Undercounter, Worktop, Prep Table, and Mega

To p
CRMR48 Undercounter and Worktop 115/60/1 2.6 240 120 6.5
CRMR48 Prep Table and Mega Top 115/60/1 2.6 290 120 6.5
CRMF48 Undercounter and Worktop F-7 and Earlier
CRMF48 Undercounter and Worktop G05 and Later 4.7 360 140 7
CRMR60 Undercounter and Worktop 115/60/1 4.2 290 120 8
CRMR60 Prep Table and Mega Top F-7 and Earlier
CRMR60 Prep Table and Mega Top F-8 and Later and

Models Converted with SP-5227 Kit
CRMF60 Undercounter and Worktop F-7 and Earlier
CRMF60 Undercounter and Worktop G-5 and Later 9.5 360 140 9.5
CRMR72 Undercounter and Worktop 115/60/1 4.2 290 120 8
CRMR72 Prep Table and Mega Top F-7 and Earlier
CRMR72 Prep Table and Mega Top F-8 and Later and

Models Converted with SP-5227 Kit

Voltage Amperes

115/60/1 2.9 290 120 5.6

115/60/1

115/60/1 6 360 140

115/60/1

115/60/1 6 360 140

6 360 140 9.2

6 360 140 10.6

(PSIG)

HIGH LOW 134a

Refrigerant

(oz.)

10.3

10.4

9.5

12

See the nameplate for electrical and refrigeration specications. The nameplate is located
inside the cabinet.
We reserve the right to make changes in specications and design without prior notice.

50

B. Wiring Diagrams

1a. Undercounter and Worktop: Refrigerator; Cabinet Thermostat

CRMR27 and CRMR48:

Auxiliary Code C-6 and Later

CRMR27: DBU

for auxiliary code

A-5(K) and earlier

51

1b. Undercounter and Worktop: Refrigerator; Cabinet Thermistor/Control Module

52

2a. Prep Table; Cabinet Thermostat (Without Defrost Heater)

* High-Pressure Switch

Cut-Out 300±10 PSIG

Cut-In 190±20 PSIG

*

53

2b. Prep Table; Cabinet Thermostat (With Defrost Heater)

*

**

°F±5°F (49°C±3°C)

°F±5°F (21°C±3°C)

70

120

* Defrost Thermostat

Cut-Out

Cut-In

54

* High-Pressure Switch

Cut-Out 300±10 PSIG

Cut-In 190±20 PSIG

2c. Prep Table; Cabinet Thermistor/Control Module

*

**

** High-Pressure Switch

Cut-Out 300±10 PSIG

Cut-In 190±20 PSIG

°F±5°F (49°C±3°C)

°F±5°F (21°C±3°C)

70

120

55

* Defrost Thermostat

Cut-Out

Cut-In

3a. Undercounter and Work Top: Freezer; Cabinet Thermostat

DBU for auxiliary code A-5(K) and earlier

*

**

°F±5°F (49°C±3°C)

°F±5°F (21°C±3°C)

70

120

56

** High-Pressure Switch

Cut-Out 300±10 PSIG

Cut-In 190±20 PSIG

* Defrost Thermostat

Cut-Out

Cut-In

3b. Undercounter and Work Top: Freezer; Cabinet Thermistor/Control Module

*

**

°F±5°F (49°C±3°C)

120

°F±5°F (21°C±3°C)

70

57

* Defrost Thermostat

Cut-Out

Cut-In

** High-Pressure Switch

Cut-Out 300±10 PSIG

Cut-In 190±20 PSIG