Hoshizaki CRMR27 Service Manual
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Hoshizaki CRMR27 Service Manual

Commercial series refrigerated kitchen equipment
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Service Manual
Commercial Series
Refrigerated Kitchen Equipment
Models
Undercounter
Worktop
Prep Table
hoshizakiamerica.com
Number: 73191
Issued: 9-29-2011
Revised: 5-1-2017

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Summary of Contents for Hoshizaki CRMR27

  • Page 1 Service Manual Commercial Series Refrigerated Kitchen Equipment Models Undercounter Worktop Prep Table Number: 73191 hoshizakiamerica.com Issued: 9-29-2011 Revised: 5-1-2017...
  • Page 2 Hoshizaki provides this manual primarily to assist qualified 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;...

  • Page 3: Table Of Contents

    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 ....................
  • Page 4 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.

  • Page 5: Important Safety Information

    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.
  • Page 6 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.
  • Page 7 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...

  • Page 8: Construction And Refrigeration Circuit Diagram

    Prep Table and Freezer. Verify Auxiliary Code in Parts List for Change Rail Cover Cutting Board Condenser Condenser Fan Motor Rear Panel Model Shown: CRMR27-12M Compressor Model Shown: CRMF27 Control Module: Verify Auxiliary Code in Parts List for Change Model Shown: CRMR36-10...

  • Page 9: Refrigeration Circuit Diagram

    B. Refrigeration Circuit Diagram 1. Refrigerator and Freezer Condenser Condenser Fan Drier High-Pressure Switch CRMR60 and CRMR72 Prep Table, CRMF48, and CRMF60 Capillary Tube Thermostatic Expansion Valve Compressor CRMF48(-W) Auxiliary Code: A-5 and B-5 Evaporator Fans (1, 2, or 3 depending on model) Evaporator Cabinet Thermostat Bulb Freezer and Prep Table Models: Defrost Heater, Defrost Safety Thermostat, and Defrost Thermistor...

  • Page 10: Sequence Of Operation And Service Diagnosis

    Off cycle defrost between run cycles. CTh open CTh closed EvapFM energized CRMR60 and CRMR72 Comp energized Comp de-energized ConFM energized ConFM de-energized EvapFM energized EvapFM de-energized CRMR27 and CRMR48 Legend: Comp-compressor ConFM-condenser fan motor CTh-cabinet thermostat EvapFM-evaporator fan motor...

  • Page 11: Prep Table

    2. Prep Table Prep Table/Mega Top Sequence Flow Chart 2. Cool Down 4. Defrost 3. Cool Down Achieved 1. Startup CTh cools to setpoint CTh above setpoint CTh in control 20 or 25 min. DT in control CTh open EvapFM energized CTh closed 8 or 6-hr.

  • Page 12: A2. Thermistor/Control Module Sequence Of Operation Flow Chart

    A2. Thermistor/Control Module Sequence of Operation Flow Chart 1. Undercounter and Work Top: Refrigerator Refrigerator Sequence Flow Chart 2. Cool Down Achieved 1. Startup/Cool Down CTh cools to setpoint CTh above setpoint CTh in control Off cycle defrost 2-min. Comp 2-min.

  • Page 13: Prep Table

    2. Prep Table...

  • Page 14: Undercounter And Work Top: Freezer

    3. Undercounter and Work Top: Freezer...

  • Page 15: B1. Thermostat Control Service Diagnosis

    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.

  • Page 16: Prep Table

    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, confirm that the appliance is not in a defrost cycle.

  • Page 17: Undercounter And Worktop: Freezer

    Diagnosis: Defrost Initiation: Manually advance DT cam to terminate DT. Confirm Comp and ConFM de-energize or remain de-energized and on auxiliary code C-6 and later, confirm EvapFM de-energizes. For CRMR48-xx aux. code C-7 and later and all other aux. code D-8 and later, confirm DH energizes. If not, replace DT. Defrost Termination: Advance DT cam to terminate DT.
  • Page 18 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.

  • Page 19: B2. Thermistor/Control Module Service Diagnosis

    B2. Thermistor/Control Module Service Diagnosis WARNING • The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Risk of electric shock. Use extreme caution and exercise safe electrical practices. •...
  • Page 20 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 flashing green LED).
  • Page 21 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.
  • Page 22 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: Confirm DH energizes (if applicable) and Comp, ConFM, and EvapFM (if applicable) de-energize.

  • Page 23: Defrost Timer Check

    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.

  • Page 24: Control Module Check

    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.
  • Page 25 b) Prep Table: DTh warms to 44°F (6.6°C). DH de-energizes. Confirm 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. Confirm continuity of DTh.

  • Page 26: Diagnostic Table

    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 Approximate Default Temperature Control Setting Undercounter Between 4 and 5 Refrigerator: 34°F (1°C) Worktop Freezer: -5°F (-21°C)
  • Page 27 Appliance Not Cooling - Possible Cause Compressor External Protector Dirty condenser. Condenser fan motor not operating. Defective. Start relay defective. Low charge. Start capacitor (if applicable) defective. Compressor Defective. Condenser Dirty. Evaporator Dirty or frozen up. Refrigerant/Refrigerant Lines Gas leak. Refrigerant lines or components restricted.

  • Page 28: Controls And Adjustments

    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.
  • Page 29 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.

  • Page 30: Safety Devices

    2. High-Pressure Switch If pressure on the high-side of the appliance exceeds Hoshizaki specifications, the high-pressure switch activates and interrupts the compressor circuit, de-energizing the compressor until the pressure returns to an acceptable level.

  • Page 31: Refrigeration Circuit And Component Service Information

    IV. Refrigeration Circuit and Component Service Information WARNING • This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • To reduce the risk of electric shock, do not touch the plug with damp hands. •...
  • Page 32 2. Brazing WARNING • R-134a itself is not flammable 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 flames), R-134a can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous.

  • Page 33: Component Service Information

    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.

  • Page 34: Door Reversal

    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.
  • Page 35 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 filler cap, filler screws, and spring cartridge.
  • Page 36 Door Installation 12) Remove the black plastic filler cap located from the hole above where the spring cartridge screw will line up. Note: The black plastic filler 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.

  • Page 37: Door/Drawer Location Reversal

    16) Close the door and tighten the upper hinge bracket outer screw. See Fig. 14. Door Fully Closed Upper Hinge Bracket Outer Screw Upper Hinge Bracket 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.
  • Page 38 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.
  • Page 39 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 Right Drawer Frame Rear Bracket Right Rear...
  • Page 40 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 Vertical Mullion Center Rear Center Rear Pilaster Drawer Frame Pilaster Bracket Fig. 19 6) Remove the center rear drawer frame bracket and the filler screw. See Fig. 20. Slide the center rear drawer frame bracket over to the new location and secure it.
  • Page 41 8) Place and secure the pilasters and shelf support clips in their new location. See Fig. 22. Replace the shelf. Center Rear Drawer Center Rear Frame Bracket Pilaster Left Side Pilasters Vertical Mullion Bracket Vertical Mullion Pilaster Vertical Mullion Fig. 22 Door Relocation 9) With the door closed, loosen, but do not remove, the upper hinge bracket outer screw.
  • Page 42 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 Bracket Thrust Washer...
  • Page 43 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.
  • Page 44 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.
  • Page 45 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.
  • Page 46 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. Horizontal Mullion Model Shown: CRMR48-D2 Silicone Location for...
  • Page 47 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 flashlight, check that there are no openings around all gaskets.

  • Page 48: Preparing The Appliance For Periods Of Non-Use

    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.

  • Page 49: Disposal

    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.

  • Page 50: Technical Information

    (PSIG) (oz.) AC Supply Model (includes drawer models) Voltage Amperes HIGH LOW 134a CRMR27 Undercounter, Worktop, and Prep Table 115/60/1 CRMF27 Undercounter and Worktop 115/60/1 CRMR36 Undercounter, Worktop, Prep Table, and Mega 115/60/1 CRMR48 Undercounter and Worktop 115/60/1 CRMR48 Prep Table and Mega Top...

  • Page 51: Wiring Diagrams

    B. Wiring Diagrams 1a. Undercounter and Worktop: Refrigerator; Cabinet Thermostat...

  • Page 52: 1B. Undercounter And Worktop: Refrigerator; Cabinet Thermistor/Control Module

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

  • Page 53: 2A. Prep Table; Cabinet Thermostat (Without Defrost Heater)

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

  • Page 54: 2B. Prep Table; Cabinet Thermostat (With Defrost Heater)

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

  • Page 55: 2C. Prep Table; Cabinet Thermistor/Control Module

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

  • Page 56: 3A. Undercounter And Work Top: Freezer; Cabinet Thermostat

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

  • Page 57: 3B. Undercounter And Work Top: Freezer; Cabinet Thermistor/Control Module

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

This manual is also suitable for:

Crmf27Crmr60Crmr36Crmf60Crmr72Crmr48 ... Show all

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