Hoshizaki MODULAR CRESCENT CUBER KM-650MAH Service Manual
  1. Manuals
  2. Brands
  3. Hoshizaki Manuals
  4. Ice Maker
  5. KM-650MAH
  6. Service manual
Hoshizaki MODULAR CRESCENT CUBER KM-650MAH Service Manual

Hoshizaki MODULAR CRESCENT CUBER KM-650MAH Service Manual

Modular crescent cuber
Hide thumbs Also See for MODULAR CRESCENT CUBER KM-650MAH:
Table of Contents

Advertisement

Quick Links

See also: Instruction Manual , Manual
Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Modular Crescent Cuber
Models
KM-650MAH
KM-650MWH
KM-650MRH
SERVICE MANUAL
1
™
Number: 73147
Issued: 12-12-2006

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MODULAR CRESCENT CUBER KM-650MAH and is the answer not in the manual?

Questions and answers

Robert Johndreau
May 9, 2025

HOW TO ADJUST THE FLOAT TO INCREASE CUBE SIZE

0

Related Manuals for Hoshizaki MODULAR CRESCENT CUBER KM-650MAH

Summary of Contents for Hoshizaki MODULAR CRESCENT CUBER KM-650MAH

  • Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Modular Crescent Cuber Models KM-650MAH KM-650MWH KM-650MRH SERVICE MANUAL ™ Number: 73147 Issued: 12-12-2006...
  • 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.

  • Page 3: Table Of Contents

    Please review this manual. It should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified service technicians should service and maintain the icemaker. This manual should be made available to the technician prior to service or maintenance.
  • Page 4 III. Technical Information ... 23 A. Water Circuit and Refrigeration Circuit ... 23 1. KM-650MAH (air-cooled) ... 23 2. KM-650MWH (water-cooled) ... 24 3. KM-650MRH (remote air-cooled) ... 25 B. Wiring Diagrams ... 26 1. KM-650MAH (air-cooled) and KM-650MWH (water-cooled) ... 26 2.

  • Page 5: Specifications

    I. Specifications A. Icemaker SPECIFICATION NO. 06A019 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER 1. KM-650MAH (air-cooled) MODEL: KM-650MAH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks...

  • Page 6: Km-650Mwh (Water-Cooled)

    SPECIFICATION NO. 06A020 2. KM-650MWH (water-cooled) ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-650MWH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 7: Km-650Mrh (Remote Air-Cooled)

    ITEM: HOSHIZAKI MODULAR CRESCENT CUBER 3. KM-650MRH (remote air-cooled) MODEL: KM-650MRH AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 8: Condensing Unit

    B. Condensing Unit 1. URC-5F 24" (610 mm.) 23-1/32" (585 mm.) 19-11/16" 6/16" x 3/4" (10 mm. x 20 mm.) (500 mm.) 4 x 2 (SLOTTED HOLES) 18-1/8" (460 mm.) 20-15/32" (520 mm.) 21-15/16" (557 mm.) 7/8" DIA. HOLE (23 mm. DIA.) 6-5/16"...

  • Page 9: Specifications

    SPECIFICATION NO. 06A022 ITEM: HOSHIZAKI REMOTE CONDENSER UNIT Specifications MODEL URC-5F MODEL: URC-5F AC SUPPLY VOLTAGE FAN MOTOR EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH WEIGHT CONNECTIONS - ELECTRIC - REFRIGERANT CONDENSER FAN MOTOR PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE...

  • Page 10: General Information

    II. General Information A. Construction 1. KM-650MAH (air-cooled) Spray Tubes Water Supply Inlet Condenser Control Box Control Switch Bin Control Thermostat Fan Motor Expansion Valve Hot Gas Valve Float Switch Drier Compressor Water Pump...

  • Page 11: Km-650Mwh (Water-Cooled)

    2. KM-650MWH (water-cooled) Spray Tubes Water Supply Inlet Water Regulator Valve Control Switch Bin Control Thermostat Control Box Expansion Valve Condenser Float Switch Water Pump Drier Hot Gas Valve Compressor...

  • Page 12: Km-650Mrh (Remote Air-Cooled)

    3. KM-650MRH (remote air-cooled) Spray Tubes Water Supply Inlet Junction Box Control Box Control Switch Bin Control Thermostat Receiver Tank Hot Gas Valve Expansion Valve Drier Float Switch Compressor Water Pump Liquid Line Valve...

  • Page 13: Sequence Of Operation

    B. Sequence of Operation The steps in the sequence are as outlined below. When power is supplied, a 5 second delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is 1, 4, 3, 2. 1.

  • Page 15: Control Board

    C. Control Board • A HOSHIZAKI exclusive solid-state control is employed in KM-650MAH, KM-650MWH and KM-650MRH Modular Crescent Cubers. • All models are pretested and factory-adjusted. 1. Fragile, handle very carefully. 2. A control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 16: Control Board Layout

    1. Control Board Layout Control Products "E" Control Board Dip Switch Alarm Reset Switch Backup Freeze Timer LED Backup Harvest Timer LED Alarm Buzzer Power LED (lights when power is supplied to the board) Relay LEDs (4) (indicate which relays are energized as listed below) LED 2 Hot Gas Valve (HGV)

  • Page 17: Features

    2. Features a) Maximum Water Supply Period – 6 minutes Inlet water valve opening, in the harvest cycle, is limited by the harvest timer. The water valve cannot remain open longer than the maximum period. The water valve can close in less than six minutes if the harvest cycle is completed.

  • Page 18: F) Led Lights And Audible Alarm Safeties

    f) LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs. At startup a 5 second delay occurs while the board conducts an internal timer check. A short beep occurs when the power switch is turned OFF. The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below.

  • Page 19: Controls And Adjustments

    3. Controls and Adjustments a) Default Dip Switch Settings The dip switch is factory-adjusted to the following positions: Dip Switch No. KM-650MAH KM-650MWH KM-650MRH b) Harvest Control – Thermistor A thermistor (semiconductor) is used for a harvest control sensor. The resistance varies depending on the suction line temperatures.

  • Page 20: C) Harvest Timer (Dip Switch 1 & 2)

    However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, call the HOSHIZAKI Technical Support Department at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting will decrease 24 hour production.

  • Page 21: E) Pump-Out Frequency Control (Dip Switch 5 & 6)

    e) Pump-Out Frequency Control (dip switch 5 & 6) The pump motor drains the water tank at the frequency set by the pump-out frequency control. The pump-out frequency control is factory-adjusted to drain the water tank every 10 cycles, and no adjustment is required. However, where water quality is bad and the icemaker needs a pump drain more often, the pump-out frequency can be adjusted as shown in the table below.

  • Page 22: Control Board Check Procedure

    4. Control Board Check Procedure Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. 1) Check the dip switch settings to assure that #3, 4, 7, 8, 9, & 10 are in the factory default position.

  • Page 23: Technical Information

    III. Technical Information A. Water Circuit and Refrigeration Circuit 1. KM-650MAH (air-cooled)

  • Page 24: Km-650Mwh (Water-Cooled)

    2. KM-650MWH (water-cooled)

  • Page 25: Km-650Mrh (Remote Air-Cooled)

    3. KM-650MRH (remote air-cooled)

  • Page 26: Wiring Diagrams

    B. Wiring Diagrams 1. KM-650MAH (air-cooled) and KM-650MWH (water-cooled) * Pressure Switch Air-Cooled Model Water-Cooled Model Cut-out 412± PSIG 384± PSIG Cut-in 327±21 PSIG 284±21 PSIG...

  • Page 27: Km-650Mrh (Remote Air-Cooled)

    2. KM-650MRH (remote air-cooled) * Pressure Switch Cut-out 412± PSIG Cut-in 327±21 PSIG...

  • Page 28: Performance Data

    C. Performance Data PERFORMANCE DATA NO. 06A019 1. KM-650MAH (air-cooled) ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-650MAH APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min.

  • Page 29: Km-650Mwh (Water-Cooled)

    PERFORMANCE DATA NO. 06A020 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER 2. KM-650MWH (water-cooled) MODEL: KM-650MWH APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min.

  • Page 30: Km-650Mrh (Remote Air-Cooled)

    ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-650MRH 3. KM-650MRH (remote air-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min.

  • Page 31: Service Diagnosis

    IV. Service Diagnosis A. 10-Minute KM Diagnostic Procedure The 10 minute check out procedure is basically a sequence check which can be used at unit start-up or for system diagnosis. Using this check out procedure will allow you to diagnose electrical system and component failures in approximately 10 minutes under normal operating conditions of 70°F or warmer air and 50°F or warmer water temperatures.

  • Page 32: Diagnostic Charts

    freeze with the float switch removed, replace the board. Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual. 6) Pump-Out Cycle (10/20 second pump out) – the compressor remains energized, the hot gas valve energizes, the fan motor de-energizes, the pump motor stops for 2 seconds and starts in reverse rotation for 10/20 seconds.
  • Page 33 Problem Possible Cause [1] The icemaker will not e)High Pressure Control start. (continued) (continued) f) Transformer g)Wiring to Control Board 1. Loose connections or h)Thermistor i) Hot Gas Valve j) Water Supply Line k) Inlet Water Valve l) Control Board Remedy 3.
  • Page 34 Problem Possible Cause [1] The icemaker will not m)Interlock Switch start. (continued) (Cleaning Valve) n)Wash Switch [2] Water continues to a)Float Switch be supplied, and the icemaker will not start. b)Control Board [3] Compressor will a)Magnetic Contactor not start or stops operating.
  • Page 35 Problem Possible Cause [5] No water comes from c) Water System spray tubes. Water (continued) pump will not start, or freeze cycle time is d)Pump Motor too short. (continued) e)Control Board [6] Fan motor will a)Fan Motor not start, or is not operating.

  • Page 36: Evaporator Is Frozen Up

    2. Evaporator is Frozen Up Problem Possible Cause [1]Freeze cycle time is a) Float Switch too long. b) Inlet Water Valve c) Control Board [2]All ice formed on a) Evaporator evaporator does not b) Water Supply Line fall into bin in harvest cycle.

  • Page 37: Low Ice Production

    Problem Possible Cause [3]Other (continued) g) Water Supply Line h) Water Filter 3. Low Ice Production Problem Possible Cause [1] Freeze cycle time is a) See chart 1.[3] and check dirty air filter or condenser, ambient or water long. temperature, water pressure, condenser water regulating valve (water-cooled model), and refrigerant charge.
  • Page 38 Problem Possible Cause [2] Abnormal noise. c) Compressor (continued) (continued) d) Refrigerant Lines [3] Ice in storage bin a) Drain Line(s) often melts. b) Icemaker and Bin c) Ice Cube Guide Remedy 2. Mounting pad out of 2. Reinstall. position. 1.

  • Page 39: Removal And Replacement Of Components

    For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the charge label in the machine compartment. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No. 700-88 be used.

  • Page 40: Brazing

    6) A liquid charge is recommended for charging an R-404A system. Invert the service cylinder and place it on scales. Open the high-side, service manifold valve. 7) Allow the system to charge with liquid until the proper charge weight is met. 8) If necessary, add any remaining charge to the system through the low-side.

  • Page 41: Removal And Replacement Of Drier

    2) Remove the panels. 3) Recover the refrigerant and store it in an approved container. 4) Remove the terminal cover on the compressor and disconnect the compressor wiring. 5) Remove the hold-down bolts, washers and rubber grommets. 6) Remove the discharge and suction pipes. 7) Remove the compressor.

  • Page 42: Removal And Replacement Of Expansion Valve

    E. Removal and Replacement of Expansion Valve Sometimes moisture in the refrigeration circuit exceeds the drier capacity and freezes up at the expansion valve. 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.

  • Page 43: Removal And Replacement Of Hot Gas Valve And Line Valve

    F. Removal and Replacement of Hot Gas Valve and Line Valve 1. Always use a copper tube of the same diameter and length when replacing the hot gas lines; otherwise the performance may be reduced. Always install a new drier every time the sealed refrigeration system is opened.

  • Page 44: Removal And Replacement Of Evaporator

    G. Removal and Replacement of Evaporator Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repairs or replacement have been made. 1) Turn off the power supply. 2) Remove the panels and the top insulation over the evaporator.

  • Page 45: Adjustment Of Water Regulating Valve - Water-Cooled Model Only

    7) Remove the screws and the valve from the bracket. 8) Install the new valve. 9) Remove the drier, then place the new drier in position. 10) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG. 11) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.

  • Page 46: Removal And Replacement Of Headmaster (Condensing Pressure Regulator - C

    J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.) - Remote Air-Cooled Model Only 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.

  • Page 47: Removal And Replacement Of Thermistor

    K. Removal and Replacement of Thermistor 1. Fragile, handle very carefully. 2. Always use a recommended sealant (High Thermal Conductive Type), Model KE4560RTV manufactured by SHINETSU SILICONE, Part Code 60Y000- 11, or Part Code 4A0683-01 equivalent. 3. Always use a recommended foam insulation (Non-absorbent Type) or equivalent.

  • Page 48: Removal And Replacement Of Inlet Water Valve

    3) Remove the junction box cover from the remote condenser unit (remote air-cooled model). 4) Remove the closed end connectors from the fan motor leads. 5) Remove the fan motor bracket and fan motor. 6) Install the new fan motor and replace the removed parts in the reverse order of which they were removed.

  • Page 49: Removal And Replacement Of Spray Tubes

    9) Remove the screw attaching the pump motor to the pump motor bracket. 10) Remove the screws attaching the pump housing to the pump motor. Remove the housing and check the impeller. 11) If the impeller is defective, install a new impeller. 12) Install the new motor or new parts, and replace the removed parts in the reverse order of which they were removed.

  • Page 50: Cleaning And Maintenance Instructions

    Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. A. Cleaning and Sanitizing Procedures 1. HOSHIZAKI recommends cleaning this unit at least once a year. More frequent cleaning, however, may be required in some existing water conditions.

  • Page 51: Cleaning Procedure

    1. Cleaning Procedure 1) Dilute approximately 16 fl. oz. of Hoshizaki "Scale Away" with 3 gal. (11 l) of water. 2) Remove all ice from the evaporator and the storage bin. Note: To remove cubes on the evaporator, turn off the power supply and turn it on after 3 minutes.

  • Page 52: Sanitizing Procedure - Following Cleaning Procedure

    20) Remove the front panel and fully open the cleaning valve. 21) Move the control switch to the "WASH" position. 22) Replace the front panel in its correct position. 23) Turn on the power supply to rinse off the cleaning solution. 24) Turn off the power supply after 5 minutes.

  • Page 53: Preparing The Icemaker For Long Storage

    damp cloth containing a neutral cleaner to wipe off oil or dirt build up. 2. Storage Bin and Scoop • Wash your hands before removing ice. Use the plastic scoop provided (bin accessory). • The storage bin is for ice use only. Do not store anything else in the bin. •...
  • Page 54 10) Blow the water-cooled condenser out, using compressed air or carbon dioxide until water stops coming out. 2. Drain the potable water supply line: 1) Remove the front panel. 2) Move the control switch on the control box to the "OFF" position. 3) Wait 3 minutes.

This manual is also suitable for:

Km-650mwhKm-650mrh

Table of Contents