Hoshizaki CRMR48W, CRMF27, CRMR48, CRMF27W Service 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: 3-28-2012
WARNING
Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied 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 qualied 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: 1-800-233-1940; (770) 487-2331
Fax: 1-800-843-1056; (770) 487-3360
E-mail: techsupport@hoshizaki.com
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: Hoshizaki Technical Support Department
Web Site: www.hoshizaki.com
NOTE: To expedite assistance, all correspondence/communication MUST include the
following information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem.
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. Specications ...................................................................................................................... 8
A. Electrical and Refrigerant Data ..................................................................................... 8
II. General Information ........................................................................................................... 9
A. Construction .................................................................................................................. 9
1. One Section ............................................................................................................. 9
2. Two Section ........................................................................................................... 10
B. Sequence of Operation ................................................................................................11
1. Refrigerator: Undercounter and Worktop .................................................................11
2. Refrigerator: Prep Table ......................................................................................... 12
3. Freezer: All ............................................................................................................. 13
C. Controls and Adjustments ........................................................................................... 14
1. Temperature Reading ............................................................................................. 14
2. Cabinet Temperature ............................................................................................. 14
D. Defrost ......................................................................................................................... 14
1. Refrigerator: Undercounter and Worktop ................................................................ 14
2. Refrigerator: Prep Table and Freezer: All ............................................................... 14
E. Compressor Protector and High-Pressure Switch ....................................................... 15
F. Perimeter/Mullion Heater ............................................................................................. 15
III. Technical Data ................................................................................................................ 16
A. Refrigeration Circuit .................................................................................................... 16
1. Refrigerator and Freezer (except CRMF48(-W)) .................................................... 16
2. CRMF48(-W) ......................................................................................................... 17
B. Wiring Diagrams .......................................................................................................... 18
1. Refrigerator: Undercounter and Worktop ................................................................ 18
2. Refrigerator: Prep Table ......................................................................................... 19
3. Freezer: All ............................................................................................................. 20
IV. Service Diagnosis ........................................................................................................... 21
A. Diagnostic Procedure .................................................................................................. 21
1. Refrigerator: Undercounter and Worktop ................................................................ 21
2. Refrigerator: Prep Table ......................................................................................... 22
3. Freezer: All ............................................................................................................. 23
B. Diagnostic Chart ......................................................................................................... 25
V. Replacement of Components .......................................................................................... 27
A. Service for Refrigerant Lines ....................................................................................... 27
1. Refrigerant Recovery ............................................................................................. 27
2. Brazing .................................................................................................................. 28
3. Evacuation and Recharge (R-134a) ...................................................................... 28
B. Important Notes for Component Replacement ............................................................ 29
C. Door Reversal ............................................................................................................. 30
3
VI. Cleaning and Maintenance Instructions ......................................................................... 33
A. Cleaning ...................................................................................................................... 33
1. Exterior ................................................................................................................... 33
2. Cabinet Interior ...................................................................................................... 33
3. Door Gaskets ......................................................................................................... 33
4. Shelves .................................................................................................................. 33
5. Worktop (Worktop Models) .................................................................................... 33
6. Cutting Board (Prep Table Models) ........................................................................ 33
7. Rail, Rail Hood, and Rail Cover (Prep Table Models) ............................................. 34
8. Air Distribution Table (Prep Table CRMR27-x Models) ........................................... 34
B. Maintenance ................................................................................................................ 35
1. Condenser .............................................................................................................. 35
2. Power Supply Connection ...................................................................................... 35
VII. Preparing the Appliance for Periods of Non-Use ........................................................... 36
VIII. Disposal ........................................................................................................................ 37
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 qualied 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 specications. 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
NEMA5-15 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 qualied 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
120lb. (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"(15cm)deep). Otherwise, the appliance will not cool properly.
• Use only 1/6 size pans up to 6"(15cm) 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 airow 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. Specications
A. Electrical and Refrigerant Data
Design
Pressure
AC Supply
Model
CRMR27(-W)(-8)(-12M)
CRMF27(-W) 3.4 310 5.0
CRMR48(-W)
CRMR48 Prep Table (-8)(-12)(-12M)(-18M) 290
CRMF48(-W) 6 360 140 13.2
Voltage Amperes
2.6 290
115/60/1
2.6
(PSIG)
HIGH LOW 134a
240
See the nameplate for electrical and refrigeration specications. The nameplate is located
inside the cabinet.
We reserve the right to make changes in specications and design without prior notice.
Refrigerant
(oz.)
5.6
120
6.5
8
II. General Information
A. Construction
1. One Section
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
Specic Parts
Air Distribution Table Panels
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
Models
CRMR27(-W)(-8)(-12M) and CRMF27(-W)
9
2. Two Section
Undercounter, Worktop, Prep Table
Common Parts
• Evaporator
• Evaporator Fan
• Evaporator Fan Shroud
Nameplate
Thermometer
Cabinet Temperature
Control Dial
(Cabinet Thermostat)
Door
Gasket
Door
Prep Table
Specic Parts
Pans
Rail Dividers
Rail Cover
Rail Hood
Power Cord
Defrost Timer (prep
table and freezer)
Rear Panel
Cutting Board
Model Shown: CRMR48-18M
Condenser
Condenser
Fan Motor
Compressor
Model Shown: CRMF48
Models
CRMR48(-W)(-8)(-12)(-12M)(-18M) and CRMF48(-W)
10
B. Sequence of Operation
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)
1. Refrigerator: Undercounter and Worktop
When power is supplied and cabinet temperature is above setpoint (CTh closed), all
components energize and cooling begins.
a) Startup/Cool Down
Temperature above setpoint. CTh closed. Comp, ConFM, and EvapFM energize.
b) Cool Down Achieved
Temperature cools to setpoint. CTh open. Comp, ConFM, and EvapFM de-energize.
Cycle continues until power is disconnected.
c) Defrost
Off-cycle defrost between run cycles.
Refrigerator: Undercounter and Worktop 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
Legend: Comp–compressor; ConFM–condenser fan motor; CTh–cabinet thermostat;
EvapFM–evaporator fan motor
11
2. Refrigerator: Prep Table
When power is supplied, EvapFM energizes. If cabinet temperature is above setpoint
(CTh closed), Comp and ConFM energize and cooling begins.
a) Startup
EvapFM energizes.
b) Cool Down
Temperature above setpoint. CTh closed. EvapFM continues. Comp and ConFM energize.
c) Cool Down Achieved
Temperature cools to setpoint. CTh open. EvapFM continues. Comp and ConFM
de-energize.
Cycle continues until power is disconnected or the 8-hr. DT terminates.
d) Defrost
DT energizes at startup. Timing of DT depends on the position of the DT cam.
• Time Initiation: 8-hr. DT terminates. EvapFM continues. If CTh closed, Comp and
ConFM de-energize.
• Manual Initiation/Termination: Rotate the DT cam.
• Time Termination: 20-min. DT terminates. EvapFM continues. If CTh closed, Comp and
ConFM energize.
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–cabinetthermostat;
8-hr. DT–8-hour defrost timer; 20-min.DT–20-minutedefrosttimer;
EvapFM–evaporatorfanmotor
setpoint
12
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