Table of Contents
Related Manuals for Hoshizaki Commercial Series
Summary of Contents for Hoshizaki Commercial Series
- Page 1 Hoshizaki Hoshizaki America, Inc. Commercial Series Refrigerated Kitchen Equipment Model Reach-In SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73179 Issued: 6-18-2010...
- Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the unit. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.
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Page 3: Table Of Contents
https://appliancetechmanuals.com IMPORTANT This manual should be read carefully before the unit is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the unit. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary. - Page 4 https://appliancetechmanuals.com V. Removal and Replacement of Components ..............33 A. Service for Refrigerant Lines ..................33 1. Refrigerant Recovery ..................... 33 2. Brazing ........................34 3. Evacuation and Recharge ..................34 B. Removal and Replacement of Compressor ..............36 C. Removal and Replacement of Evaporator..............37 D.
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Page 5: Important Safety Information
https://appliancetechmanuals.com Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit. WARNING Indicates a hazardous situation which could result in death or serious injury. CAUTION Indicates a situation which could result in damage to the unit. -
Page 6: Specifications
https://appliancetechmanuals.com I. Specifications A. Nameplate Ratings Design Pressure (PSIG) Refrigerant (oz.) AC Supply Model Voltage Amperes HIGH R-134a R-404A CR1A-FS/HS 10.6 CF1A-FS/HS 115/60/1 CR2A-FS/HS 12.5 CF2A-FS/HS 16.9 See the nameplate for electrical and refrigeration specifications. The nameplate is located on the inner right side wall of the cabinet behind the front panel. Note: We reserve the right to make changes in specifications and design without prior notice. -
Page 7: One Section/Two Section
https://appliancetechmanuals.com Unit: mm (in.) DOOR OPENING DOOR OPENING DOOR OPENING DOOR EXTERIOR EXTERIOR EXTERIOR INTERIOR INTERIOR INTERIOR DOOR SWING CASTER MODELS WIDTH HEIGHT HEIGHT STAY OPEN WIDTH (W) HEIGHT (H) DEPTH (D) WIDTH HEIGHT DEPTH (DS) HEIGHT HEIGHT (DW) (DH) (DHU/DHL) POSITION COMMERCIAL... -
Page 8: General Information
https://appliancetechmanuals.com II. General Information A. Construction 1. One Section Compressor Condenser Fan Motor Condensate Pump Control Box Cover Condenser Air Filter Control Box Front Panel Power Cord Door Switch Control Module Float Switch Door Power Switch Display Module Float Reservoir Door Lock Switch Cover... -
Page 9: Two Section
https://appliancetechmanuals.com 2. Two Section Thermostatic Expansion Valve (CF2A-FS/HS) Compressor Condensate Pump Condenser Fan Motor Power Switch Condenser Air Filter Power Cord Front Panel Control Box Cover Float Switch Bracket Control Box Door Switch Light Door Lock Float Switch Control Module Reservoir Reservoir Cover Display Module... -
Page 10: Sequence Of Operation
https://appliancetechmanuals.com B. Sequence of Operation 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. Note: 1. There is a slight delay at startup. 2. There is a 2-minute minimum Comp on time and a 2-minute minimum Comp off time. -
Page 11: B) Freezer
https://appliancetechmanuals.com b) Freezer 1. Startup/Cool Down MH and PH energize. There is a slight delay before cabinet temperature appears on DM and Comp, ConFM, and EvapFM energize. 2. Cool Down Achieved CM monitors cooling of the cabinet via CTh. CTh cools to 3 F (1.7 C) below setpoint. -
Page 12: Sequence Flow Charts
https://appliancetechmanuals.com Refrigerator Sequence Flow Chart 1. Startup/Cool Down 2. Cool Down Achieved 4. Defrost 5. Defrost Termination 3. Cool Down Restart DTh warms to CTh cools CTh warms DTh cools to 40°F (4.4°C) to 3°F (1.7°C) to 3°F (1.7°C) 8.6°F (-13°C) Slight below setpoint. -
Page 13: B) Freezer
https://appliancetechmanuals.com Freezer Sequence Flow Chart 2. Cool Down Achieved 1. Startup/Cool Down 4. Defrost 5. Defrost Termination 3. Cool Down Restart DTh is at or below 32°F (0°C) DTh warms to 59°F (15°C) CTh cools to and 4-hour cumulative Comp DTh reaches 32°F (0°C), 3-min. -
Page 14: Display Module
https://appliancetechmanuals.com C. Display Module When the power switch is moved to the "ON" position there is a slight delay, then the current cabinet temperature is displayed. From the display module, the cabinet setpoint and temperature display scale can be changed. For further details, see "II.C.2. Controls and Adjustments."... -
Page 15: Controls And Adjustments
https://appliancetechmanuals.com 2. Controls and Adjustments a) Default Settings 1. Temperature Setting: Refrigerator: 36°F (3°C). Freezer: -4°F (-20°C). 2. Temperature Display Scale: F. b) Temperature Setpoint The temperature setpoint is the value for the average cabinet temperature. The temperature differential for the compressor to turn on and off is ±3°F (±1.7°C) of the temperature setpoint for refrigerators and +2°F/-3°F (+1.1°C/-1.7°C) of the temperature setpoint for freezers. -
Page 16: Control Module
https://appliancetechmanuals.com D. Control Module All models are pretested and factory set CAUTION 1. The control module is fragile, handle very carefully. 2. Do not change wiring and connections. Never misconnect terminals. 3. Do not short out power supply to test for voltage. 1. -
Page 17: Alarm Safeties
https://appliancetechmanuals.com 2. Alarm Safeties Alarm signals are designed to protect the unit and food product. These alarms give information or warnings in the event the unit is operating out of acceptable parameters. Should one of the alarms occur, follow the instructions in the table below to address the alarm. -
Page 18: Compressor Overload And Short Cycle Protection
https://appliancetechmanuals.com F. Compressor Overload and Short Cycle Protection 1. Compressor Overload a) Refrigerator The refrigerator compressor is protected by an external compressor overload and a high-pressure switch (2-section). When the compressor temperature or amperage value is above the limit specified by the compressor manufacturer, the external compressor overload activates, turning off the compressor. -
Page 19: Technical Data
https://appliancetechmanuals.com III. Technical Data A. Wiring Diagrams 1. CR1A-FS/HS... - Page 20 https://appliancetechmanuals.com 2. CR2A-FS/HS...
- Page 21 https://appliancetechmanuals.com 3. CF1A-FS/HS...
- Page 22 https://appliancetechmanuals.com 4. CF2A-FS/HS...
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Page 23: Service Diagnosis
https://appliancetechmanuals.com IV. Service Diagnosis WARNING 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Risk of electric shock. Use extreme caution and exercise safe electrical practices. -
Page 24: Refrigerator
https://appliancetechmanuals.com 1. Refrigerator 7) Startup/Cool Down–EvapFM, MH, and PH energize. There is a slight delay, then Comp and ConFM energize and cabinet temperature appears on DM. a) Startup Diagnosis: Check that EvapFM energizes. If not, confirm that the door(s) are closed and DS contacts are closed. Check EvapFM blade for binding. Next, check for 115VAC at DSR (terminals 7 (white (W)) and 8 (light blue (LBU)). -
Page 25: Freezer
https://appliancetechmanuals.com 9) Defrost Temperature-Initiated Defrost: DTh cools to 8.6°F (-13°C). EvapFM, MH, and PH continue. Comp and ConFM de-energize. Defrost Termination: DTh warms to 40°F (4.4°C). EvapFM, MH, and PH continue. Comp and ConFM energize. 2-minute temperature display delay timer starts. 2 minutes later, cabinet temperature appears on DM. - Page 26 https://appliancetechmanuals.com b) Cool Down Diagnosis: Confirm that Comp and ConFM energize and cabinet temperature appears on DM. If not, confirm 115VAC between CM L3 and CM N5. If 115VAC is not present, confirm wiring connections are secure for both the power wire (CM L3) and the neutral wire (CM N5).
- Page 27 https://appliancetechmanuals.com 9) Defrost Temperature/Time-Initiated Defrost: Once DTh cools to 32°F (0°C), a 4-hour cumulative Comp run timer starts. Once DTh is at or below 32°F (0°C) and 4-hour cumulative Comp run timer terminates, MH and PH continue, DH energizes, and Comp, ConFM, and EvapFM de-energize.
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Page 28: Control Module Check
https://appliancetechmanuals.com 10) MH and PH Diagnosis: Check that MH and PH energize. Check for 115VAC at MH and PH. If 115VAC is not present, check power supply and continuity of power switch. If 115VAC is present, check amp draw of MH or PH. If an amp reading is not present, check the continuity of MH or PH. -
Page 29: Thermistor Check
https://appliancetechmanuals.com 10) Check that the components restart after defrost termination. Refrigerator: Compressor and condenser fan motor energize as soon as the defrost thermistor termination temperature is satisfied. See "Defrost Termination" under "IV.A.1.9) Defrost" and "IV.C. Thermistor Check." If components fail to start, control module must be replaced. -
Page 30: Diagnostic Chart
https://appliancetechmanuals.com D. Diagnostic Chart 1. Unit Not Cooling Problem Possible Cause Remedy [1] Unit does not a) Power Supply 1. Unplugged, off, blown fuse, 1. Plug in, turn on, replace, or reset. start. or tripped or defective circuit breaker. 2. Loose connection. 2. - Page 31 https://appliancetechmanuals.com Problem Possible Cause Remedy [3] Cool down e) Refrigerators and 1. Defective. 1. Let compressor cool and allow does not start. 2-Section Freezer overload to reset. (compressor) External Compressor If overload does not reset: (continued) Overload; Refrigerator - replace the 1-Section Freezer overload.
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Page 32: Evaporator Is Frozen Up
https://appliancetechmanuals.com 2. Evaporator is Frozen Up Problem Possible Cause Remedy [1] Evaporator does a) Defrost Thermistor 1. Out of position or defective. 1. Reposition or replace. See "IV.C. not defrost Thermistor Check." completely. b) Control Module 1. Defective. 1. See "IV.B. Control Module Check." c) Defrost Heater (freezer) 1. -
Page 33: Removal And Replacement Of Components
https://appliancetechmanuals.com V. Removal and Replacement of Components WARNING 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Move the power switch to the "OFF" position, then unplug the unit from the electrical outlet before servicing. -
Page 34: Brazing
https://appliancetechmanuals.com 2. Brazing WARNING 1. R-134a and R-404A themselves are not flammable at atmospheric pressure and temperatures up to 176°F (80°C). 2. R-134a and R-404A themselves are not explosive or poisonous. However, when exposed to high temperatures (open flames), R-134a and R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. - Page 35 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 ARI Standard 700 (latest edition) be used.
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Page 36: Removal And Replacement Of Compressor
https://appliancetechmanuals.com B. Removal and Replacement of Compressor CAUTION 1. Always install a new drier every time the sealed refrigeration system is opened. 2. 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 flow. -
Page 37: Removal And Replacement Of Evaporator
https://appliancetechmanuals.com C. Removal and Replacement of Evaporator See Fig. 4. CAUTION 1. Always install a new drier every time the sealed refrigeration system is opened. 2. Do not replace the drier until after all other repair or replacement has been made. - Page 38 https://appliancetechmanuals.com Evaporator Replacement Refrigeration Circuit Mounting Screw Refrigeration Circuit Evaporator Mounting Mounting Screw Bracket Evaporator Brackets Evaporator Mounting Bracket Evaporator Freezer Defrost Thermistor Location Evaporator Drain Bracket Defrost Thermistor Evaporator Shroud Freezer Defrost Cabinet Thermistor Heater Refrigerator Defrost Thermistor Clip and Tie Evaporator Fan Shroud Fig.
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Page 39: Removal And Replacement Of Condenser
https://appliancetechmanuals.com D. Removal and Replacement of Condenser CAUTION 1. Always install a new drier every time the sealed refrigeration system is opened. 2. 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 flow. -
Page 40: Removal And Replacement Of Expansion Valve (2-Section Freezer)
https://appliancetechmanuals.com E. Removal and Replacement of Expansion Valve (2-Section Freezer) Moisture in the refrigeration circuit may exceed drier capacity and freeze up at the expansion valve. CAUTION 1. Always install a new drier every time the sealed refrigeration system is opened. -
Page 41: Removal And Replacement Of Evaporator Fan Motor
https://appliancetechmanuals.com F. Removal and Replacement of Evaporator Fan Motor 1) Move the power switch to the "OFF" position and unplug the unit. 2) Remove the evaporator fan shroud. Remove the cabinet thermistor from the evaporator fan shroud. 3) Remove the screws securing the evaporator fan bracket and ground wire, then remove the evaporator fan bracket and evaporator fan motor. -
Page 42: Removal And Replacement Of Control Module
https://appliancetechmanuals.com H. Removal and Replacement of Control Module 1) Move the power switch to the "OFF" position, then unplug the unit. 2) Remove the control box cover. 3) Disconnect the display cable, defrost thermistor, and cabinet thermistor from the control module. -
Page 43: Removal And Replacement Of Thermistors
https://appliancetechmanuals.com I. Removal and Replacement of Thermistors This section covers removal and replacement of the cabinet and defrost thermistors. For a thermistor check procedure, see "IV.C. Thermistor Check." CAUTION 1. The thermistors are fragile; handle very carefully. 2. Do not shorten or cut the thermistor leads. 1. - Page 44 https://appliancetechmanuals.com 2. Defrost Thermistor 1) Move the power switch to the "OFF" position, then unplug the unit. 2) Remove the evaporator fan shroud. Remove the cabinet thermistor from the evaporator fan shroud. 3) Note the location of the defrost thermistor, then remove the defrost thermistor. 4) Remove the control box cover.
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Page 45: Removal And Replacement Of Condensate Pump
https://appliancetechmanuals.com J. Removal and Replacement of Condensate Pump 1) Move the power switch to the "OFF" position, then unplug the unit. 2) Remove the control box cover, then disconnect the condensate pump wires. 3) Remove the condensate pump. 4) Place the new condensate pump in position and connect the wires. 5) Route the condensate pump tubing. -
Page 46: Removal And Replacement Of Door Gasket
https://appliancetechmanuals.com K. Removal and Replacement of Door Gasket Remove old gasket by pulling it directly out of the vinyl gasket retainer. Thoroughly clean the gasket area with mild soap and water prior to installing the new gasket. The new gasket should be installed by assembling it at the corners first, then working toward the center at the top, bottom, and sides.