Hoshizaki MODULAR FLAKER F-801MAH/-C Service Manual
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Hoshizaki MODULAR FLAKER F-801MAH/-C Service Manual

Hoshizaki MODULAR FLAKER F-801MAH/-C Service Manual

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HOSHIZAKI
MODULAR FLAKER
F-801MAH/-C
F-801MWH/-C
SERVICE MANUAL
MODEL
NO:
June 7, 2004
ISSUED:
REVISED:
June 15, 2005
73113

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Summary of Contents for Hoshizaki MODULAR FLAKER F-801MAH/-C

  • Page 1 HOSHIZAKI MODULAR FLAKER MODEL F-801MAH/-C F-801MWH/-C SERVICE MANUAL 73113 June 7, 2004 ISSUED: REVISED: June 15, 2005...
  • Page 2 No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance.

  • 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. I.
  • Page 4 5. Removal and Replacement of Expansion Valve ... 43 6. Removal and Replacement of Water Regulating Valve (water-cooled model only) ... 44 7. Removal and Replacement of Evaporator Assembly ... 45 8. Removal and Replacement of Fan Motor ... 49 9.

  • Page 5: Specification

    I. Specification 1. Icemaker F-801MAH AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR FAN MOTOR OTHER MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY...

  • Page 6: F-801Mwh

    F-801MWH AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR OTHER MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 7: F-801Mah-C

    F-801MAH-C AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR FAN MOTOR OTHER MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 8: F-801Mwh-C

    F-801MWH-C AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR OTHER MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day ) Reference without *marks SHAPE OF ICE ICE QUALITY APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 9: General Information

    II. General Information 1. Construction F-801MAH/-C Control Water Valve Bin Control Ice Chute Evaporator Expansion Valve Flush Water Valve Control Box Gear Motor Water Supply Inlet Junction Box Condenser Fan Motor Compressor Drier...

  • Page 10: F-801Mwh/-C

    F-801MWH/-C Control Water Valve Bin Control Ice Chute Evaporator Expansion Valve Flush Water Valve Control Box Gear Motor Water Supply Inlet Junction Box Water Regulator Compressor Drier...

  • Page 11: Control Box Layout

    2. Control Box Layout F-801MAH/-C CONNECTOR PRESSURE SWITCH START CAPACITOR CAPACITOR Note: The above component names are identical with the wiring label, but not with the parts list. WATER CONTROL RELAY FLUSH TIMER TRANSFORMER GEAR MOTOR RELAY CIRCUIT PROTECT RELAY MOTOR GEAR MOTOR PROTECT RELAY...

  • Page 12: F-801Mwh/-C

    F-801MWH/-C...

  • Page 13: Technical Information

    III. Technical Information 1. Water Circuit and Refrigeration Circuit F-801MAH/-C...

  • Page 14: F-801Mwh/-C

    F-801MWH/-C...

  • Page 15: Wiring Diagrams

    2. Wiring Diagrams F-801MAH/-C, F-801MWH/-C...

  • Page 16: Sequence Of Electrical Circuit

    3. Sequence of Electrical Circuit [a] When power switch is moved to “ON” position and flush switch to “ICE” position, water starts to be supplied to reservoir.
  • Page 17 [b] When reservoir has been filled, gear motor starts immediately.
  • Page 18 [c] Compressor starts about 60 sec. after gear motor starts.
  • Page 19 [d] Bin control operates, and about 6 sec. later, compressor and gear motor stop simultaneously.
  • Page 20 [e] Low water (except water-cooled model).
  • Page 21 [f] Low water (water-cooled model), or dirty air filter (air-cooled model), pressure switch to “OPEN”, compressor and gear motor operate intermittently.
  • Page 22 [g] When flush switch is moved to “FLUSH” position, flush water valve opens and flushes reservoir and evaporator.
  • Page 23 [h] When flush timer operates (for 15 min. every 12 hours).
  • Page 24 [i] When 208-230V are supplied to circuit protect relay, it protects the circuit from miswiring. If the power supply is properly connected, the contact of circuit protect relay does not move even when the coil is energized.
  • Page 25 [j] When input voltage is too low, (less than 70%), gear motor fuse (1.5A) is blown causing the compressor and gear motor to turn off immediately.

  • Page 26: Timing Chart

    4. Timing Chart 1. CIRCUIT PROTECT RELAY UPPER 2. WATER LEVEL LOWER BOTTOM UPPER 3. FLOAT SWITCH LOWER 4. WATER CONTROL RELAY 5. CONTROL WATER VALVE 1 - 2 6. FLUSH TIMER 2 - 3 FLUSH 7. FLUSH SWITCH 8. FLUSH WATER VALVE 9.
  • Page 27 LOW WATER 1. CIRCUIT PROTECT RELAY UPPER 2. WATER LEVEL LOWER BOTTOM UPPER 3. FLOAT SWITCH LOWER 4. WATER CONTROL RELAY 5. CONTROL WATER VALVE 1 - 2 6. FLUSH TIMER 2 - 3 FLUSH 7. FLUSH SWITCH 8. FLUSH WATER VALVE 9.
  • Page 28 1. CIRCUIT PROTECT RELAY UPPER 2. WATER LEVEL LOWER BOTTOM UPPER 3. FLOAT SWITCH LOWER 4. WATER CONTROL RELAY 5. CONTROL WATER VALVE 1 - 2 6. FLUSH TIMER 2 - 3 FLUSH 7. FLUSH SWITCH 8. FLUSH WATER VALVE 9.

  • Page 29: Performance Data

    5. Performance Data F-801MAH APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. (TOTAL) gal. / day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm SUCTION PRESSURE PSIG (kg/cm TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.

  • Page 30: F-801Mwh

    F-801MWH APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. (TOTAL) gal. / day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm SUCTION PRESSURE PSIG (kg/cm WATER FLOW FOR CONDENSER PRESSURE DROP OF COOLING WATER LINE HEAT OF REJECTION FROM CONDENSER HEAT OF REJECTION FROM COMPRESSOR...

  • Page 31: F-801Mah-C

    F-801MAH-C APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day (kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. (TOTAL) gal. / day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm SUCTION PRESSURE PSIG (kg/cm TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.

  • Page 32: F-801Mwh-C

    F-801MWH-C APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. (TOTAL) gal. / day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm SUCTION PRESSURE PSIG (kg/cm WATER FLOW FOR CONDENSER PRESSURE DROP OF COOLING WATER LINE HEAT OF REJECTION FROM CONDENSER HEAT OF REJECTION FROM COMPRESSOR...

  • Page 33: Adjustment Of Components

    IV. Adjustment of Components 1. Adjustment of Water Regulating Valve (water-cooled model only) The water regulating valve or also called “water regulator” is factory-adjusted. No adjustment is required under normal use. Adjust the water regulator , if necessary, using the following procedures.

  • Page 34: Adjustment Of Flake Size

    2. Adjustment of Flake Size To adjust the flake size, change the direction of the cutter head on the top of the auger, according to the following procedures: 1) Remove the bolt and the cutter head. 2) The cutter head has two holes, one for fine flake and the other for coarse flake size.

  • Page 35: Service Diagnosis

    V. Service Diagnosis 1. No Ice Production PROBLEM [1] The icemaker will not start. [2] Water flow does not stop, and the icemaker will not start [3] Water has been supplied, but the icemaker will not start. POSSIBLE CAUSE Power Supply OFF position.
  • Page 36 PROBLEM [4] Water has been a) Gear Motor Fuse supplied, Fan Motor starts, but Gear Motor and b) Thermal Protector Compressor will not start. [5] Gear Motor and a) Pressure Switch Compressor start but operate intermittently. [6] Gear Motor starts, a) X2 Relay on Control but Compressor will not start or operates...

  • Page 37: Low Ice Production

    2. Low Ice Production PROBLEM [1] Low ice production a) Refrigerant Line b) High-side Pressure c) Expansion Valve POSSIBLE CAUSE 1. Gas leaks. 2. Refrigerant line clogged. 3. Overcharged. 1. Dirty Air Filter or Too High Condenser. 2. Ambient or condenser water temperature too warm.

  • Page 38: Other

    3. Other PROBLEM [1] Abnormal noise a) Fan Motor b) Compressor c) Refrigerant Lines d) Gear Motor (Ice e) Evaporator [2] Overflow from a) Water Supply Reservoir (Water does not stop.) b) Control Water Valve c) Float Switch [3] Gear Motor Fuse a) Power Supply blown frequently.

  • Page 39: Removal And Replacement Of Components

    VI. Removal and Replacement of Components Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced. 1. The Polyolester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

  • Page 40: Brazing

    5) Disconnect the vacuum pump, and attach a refrigerant service cylinder to the high- side line. 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 No. 700-88 be used.

  • Page 41: Removal And Replacement Of Compressor

    3. Removal and Replacement of Compressor 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, and remove the panels. 2) Remove the terminal cover on the compressor, and disconnect the compressor wiring.

  • Page 42: Removal And Replacement Of Drier

    14) Evacuate the system, and charge it with refrigerant. For the air-cooled and water-cooled models, see the nameplate for the required refrigerant charge and type. For the remote air- cooled models, see the label on the control box. 15) Connect the terminals to the compressor, and replace the terminal cover in its correct position.

  • Page 43: Removal And Replacement Of Expansion Valve

    5. Removal and Replacement of Expansion Valve Sometimes moisture in the refrigerant 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 repairs or replacement have been made.

  • Page 44: Removal And Replacement Of Water Regulating Valve (Water-Cooled Model Only)

    6. Removal and Replacement of Water Regulating Valve (water-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 repairs or replacement have been made. 1) Turn off the power supply, remove the panels and close the water supply line shut-off valve.

  • Page 45: Removal And Replacement Of Evaporator Assembly

    7. Removal and Replacement of Evaporator Assembly 1) Turn off the power supply. 2) Remove the panels. 3) Move the flush switch to the "FLUSH" position. 4) Turn on the power supply and drain out all water from the water line. 5) Turn off the power supply.
  • Page 46 13) Recover the refrigerant and store it in an approved container, if required by an applicable law. 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.
  • Page 47 26) Assemble the removed parts in the reverse order of the above procedure. Be careful not to scratch the surface of the O-ring, or it may cause water leaks. Handle the mechanical seal with care not to scratch nor to contaminate its contact surface.
  • Page 48 Auger Mechanical Seal O-ring Bearing - Lower Bolt Washer Coupling - Spline Gear Motor Rubber O-ring Nylon Ring Bolt Washer Cutter Extruding Head Washer Socket Head Cap Screw Evaporator Washer Socket Head Cap Screw Barrier...

  • Page 49: Removal And Replacement Of Fan Motor

    8. Removal and Replacement of Fan Motor 1) Turn off the power supply and remove the panels. 2) Remove the wire connectors from the fan motor leads. 3) Remove the fan motor bracket and fan motor. 4) Install the new fan motor. 5) Replace the fan motor bracket and the wire connectors.

  • Page 50: Removal And Replacement Of Flush Water Valve

    10. Removal and Replacement of Flush Water Valve 1) Turn off the power supply, remove the panels and close the water supply line shut-off valve. 2) Remove the clamp and disconnect the hose from the flush water valve. Note: Water may still remain inside the evaporator. Be sure to drain the water into the drain pan.

  • Page 51: Cleaning And Maintenance

    VII. Cleaning and Maintenance Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. 1. Preparing the Icemaker for Long Storage When shutting off the icemaker for an extended time, drain out all water from the water line and remove the ice from the storage bin.

  • Page 52: Cleaning And Sanitizing Instructions

    [a] Cleaning Solution Dilute 4.8 fl. oz. (142 ml) of recommended cleaner Hoshizaki “Scale Away” or “LIME-A-WAY” (Economics Laboratory, Inc.) with 0.8 gallons (3 l) of warm water. This is a minimum amount. Make more solution if necessary.

  • Page 53: [B] Cleaning Procedure

    [b] Cleaning Procedure The cleaning process will remove lime deposits from the water system. 1) Remove the front panel and top panel, then turn off the power supply. 2) Close the water supply line shut-off valve. 3) Remove all ice from the storage bin. 4) Move the flush switch to the “FLUSH”...

  • Page 54: [C] Sanitizing Solution

    [c] Sanitizing Solution Dilute 2.5 fl. oz. (74 ml or 5 tbs) of IMS-II Sanitizer or a 5.25% sodium hypochlorite solution (chlorine bleach) with 5 gallons (19 l) of warm water. For safety and maximum effectiveness, use the solution immediately after dilution.

  • Page 55: [E] Sanitizing Procedure - Final

    14) Replace all parts in their correct positions. When installing the baffles, make sure that the bent surface (the one without the studs) faces the actuator so that the bent surface can guide the ice to the center of the actuator. 15) Move the flush switch to the “ICE”...
  • Page 56 16) When the gear motor starts, remove the front panel and turn off the power supply. 17) Drain out all water from the water line. See 2) and 3). 18) Move the flush switch to the “ICE” position and run the icemaker. 19) Turn off the power supply after 30 minutes.

  • Page 57: Maintenance

    Consult with your local distributor about inspection and maintenance service. To obtain the name and phone number of your local distributor, call Hoshizaki Technical Support at 1-800-233-1940. 1) Stainless Steel Exterior To prevent corrosion, wipe the exterior occasionally with a clean and soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up.
  • Page 58 3) Air Filter (air-cooled model only) A plastic mesh air filter removes dirt or dust from the air, and keeps the condenser from getting clogged. As the filter gets clogged, the icemaker’s performance will be reduced. Check the filter at least twice a month. When clogged, use warm water and a neutral cleaner to wash the filter.

This manual is also suitable for:

F-801mwhF-801mwh-cF-801mah

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