Hoshizaki CRMR72W01, CRMR4812, CRMF6001, CRMF27LP, CRMR48WD4 User Manual

Hoshizaki

Hoshizaki America, Inc.

Commercial Series
Refrigerated Kitchen Equipment

Models
Undercounter

“A Superior Degree

of Reliability”

www.hoshizaki.com

Worktop
Prep Table

SERVICE MANUAL

Number: 73191
Issued: 9-29-2011
Revised: 9-20-2013

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]

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.

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

1. Refrigerator and Freezer (except CRMF48(-01)(-W)(-W01) auxiliary codes A-5

andB-5) ................................................................................................................... 9

2. CRMF48(-01)(-W)(-W01) (auxiliary codes A-5 and B-5) ........................................ 10

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

A. Sequence of Operation Flow Chart ..............................................................................11

1. Refrigerator: Undercounter and Worktop .................................................................11

a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) ...........................................11

b) CRMR60(-W), CRMR72(-W) ...............................................................................11

2. Refrigerator: Prep Table ......................................................................................... 12

3. Freezer: All ............................................................................................................. 12

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

1. Refrigerator: Undercounter and Worktop ................................................................ 13

a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) .......................................... 13

b) CRMR60(-W), CRMR72(-W) .............................................................................. 14

2. Refrigerator: Prep Table ......................................................................................... 14

3. Freezer: All ............................................................................................................. 16

C. Diagnostic Table .......................................................................................................... 18

III. Controls and Adjustments ............................................................................................... 21

A. Temperature Settings .................................................................................................. 21

1. Temperature Reading ............................................................................................. 21

2. Cabinet Temperature ............................................................................................. 21

B. Defrost ......................................................................................................................... 21

1. Refrigerator: Undercounter and Worktop ................................................................ 21

2. Refrigerator: Prep Table and Freezer: All ............................................................... 21

C. Safety Devices ............................................................................................................ 22

D. Perimeter/Mullion Heater ............................................................................................. 22

IV. Refrigeration Circuit and Component Service Information.............................................. 23

A. Refrigeration Circuit Service Information .................................................................... 23

1. Refrigerant Recovery ............................................................................................. 23

2. Brazing .................................................................................................................. 24

3. Evacuation and Recharge (R-134a) ...................................................................... 24

B. Component Service Information .................................................................................. 25

C. Door Reversal ............................................................................................................. 26

V. Maintenance .................................................................................................................... 29

1. Condenser .............................................................................................................. 29

2. Power Supply Connection ...................................................................................... 29

3

VI. Preparing the Appliance for Periods of Non-Use ............................................................ 30

VII. Disposal ......................................................................................................................... 31

VIII. Technical Information .................................................................................................... 32

A. Electrical and Refrigerant Data ................................................................................... 32

B. Wiring Diagrams .......................................................................................................... 33

1a. Refrigerator: Undercounter and Worktop Auxiliary Code C-5(D) and Earlier ....... 33

a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) ........................................ 33

b) CRMR60(-W), CRMR72(-W) ............................................................................. 34

1b. Refrigerator: Undercounter and Worktop Auxiliary Code C-5(E) and Later ......... 35

a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) ........................................ 35

b) CRMR60(-W), CRMR72(-W) .............................................................................. 36

2a. Refrigerator: Prep Table Auxiliary Code C-5(D) and Earlier ................................ 37

2b. Refrigerator: Prep Table Auxiliary Code C-5(E) and Later .................................... 38

3a. Freezer: All Auxiliary Code C-5(D) and Earlier..................................................... 39

3b. Freezer: All Auxiliary Code C-5(E) and Later ....................................................... 40

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 to reduce the risk of potential shock
hazards. It must be plugged into a properly grounded, independent 3-prong wall
outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have
a qualied electrician replace it with a properly grounded, independent 3-prong
wall outlet. Do not remove the ground prong from the power cord and do not use
an adapter plug. Failure to follow these instructions may result in death, electric
shock, or re.

• Do not use an extension cord.

• Do not use an appliance with a damaged power cord. The power cord should not

be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions
could result in electric shock or re. To unplug the appliance, be sure to pull the
plug, not the cord, and do not jerk the cord.

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 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-x Prep Table Models: 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)

Prep Table

Specic Parts

Air Distribution Table Panels

CRMR27-8, CRMR27-12M Only

Upper Front

Lower Front

Pans

Rail Dividers

Upper Rear

Lower Rear

Rail Hood

Power Cord

Defrost Timer (prep
table and freezer)

Rear Panel

Rail Cover

Cutting Board

Model Shown: CRMR27-12M

Condenser

Condenser Fan Motor

Compressor

Model Shown: CRMF27

8

B. Refrigeration Circuit Diagram

1. Refrigerator and Freezer (except CRMF48(-01)(-W)(-W01) auxiliary codes A-5 andB-5)

Condenser

Condenser Fan

High-Pressure Switch
CRMR60 and CRMR72 Prep Table,
CRMF48(-01)(-W)(-W01), and CRMF60(-W)

Capillary Tube

Compressor

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

Drier

Evaporator

Defrost Heater and
Defrost Safety Thermostat
(freezer only)

Cabinet Thermostat Bulb

9

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

Condenser

Condenser Fan

High-Pressure Switch

Drier

Compressor

Evaporator Fans

Evaporator

Thermostatic Expansion Valve

Defrost Heater and
Defrost Safety Thermostat

Cabinet Thermostat Bulb

10

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

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)

A. Sequence of Operation Flow Chart

1. Refrigerator: Undercounter and Worktop

a) CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01)

Refrigerator: CRMR27(-01)(-W)(-W01), CRMR48(-01)(-W)(-W01) Sequence Flow Chart

1. Startup/Cool Down

CTh above setpoint CTh cools to setpoint

CTh closed
Comp energized
ConFM energized
EvapFM energized

2. Cool Down Achieved

CTh in control

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

CTh above

setpoint

Off cycle defrost
between run cycles.

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

EvapFM–evaporator fan motor

b) CRMR60(-W), CRMR72(-W)

Refrigerator: CRMR60(-W), CRMR72(-W) Sequence Flow Chart

1. Startup

EvapFM energized

2. Cool Down

CTh above setpoint

CTh in control

CTh closed
Comp energized
ConFM energized
EvapFM energized

3. Cool Down Achieved

CTh cools to setpoint

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

CTh above

setpoint

Off cycle defrost
between run cycles.

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

EvapFM–evaporator fan motor

11

2. Refrigerator: Prep Table

Refrigerator: Prep Table Sequence Flow Chart

1. Startup

EvapFM energized

2. Cool Down

CTh above setpoint

CTh closed
Comp energized
ConFM energized
EvapFM energized

3. Cool Down Achieved

CTh cools to setpoint

CTh in control

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

4. Defrost

20 min. DT in control

CTh above

setpoint

8-hr. DT terminates
20-min. DT starts
EvapFM energized
Comp de-energized
ConFM de-energized

CTh above

20-min. DT terminates
8-hr. DT starts

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

8-hr. DT–8-hour defrost timer; 20-min.DT–20-minutedefrosttimer;
EvapFM–evaporatorfanmotor

3. Freezer: All

Freezer Sequence Flow Chart

setpoint

1. Startup/Cool Down

CTh above setpoint

CTh in control

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

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

20 min. DT in control

CTh above

setpoint

8-hr. DT terminates
20-min. DT starts
DH energized
Comp de-energized
ConFM de-energized
EvapFM de-energized
MH de-energized
PH de-energized

CTh above

setpoint

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

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

DH–defrostheater; 8-hr. DT–8-hour defrost timer;
20-min.DT–20-minutedefrosttimer; EvapFM–evaporatorfanmotor;
MH–mullionheater; PH–perimeterheater

12