1. Manuals
  2. Brands
  3. Hoshizaki Manuals
  4. Ice Maker
  5. DCM-500BAF
  6. Service manual

Hoshizaki DCM-500BAF Service Manual

Cubelet ice dispenser
Hide thumbs Also See for DCM-500BAF:
Table of Contents

Advertisement

Quick Links

See also: Instruction Manual
CUBELET ICE DISPENSER
MODEL
HOSHIZAKI
DCM-500BAF
DCM-500BWF
DCM-750BAF
DCM-750BWF
SERVICE MANUAL
73071
NO:
MAR. 11, 1999
ISSUED:
REVISED: DEC. 17, 2003

Advertisement

Table of Contents
loading

Related Manuals for Hoshizaki DCM-500BAF

Summary of Contents for Hoshizaki DCM-500BAF

  • Page 1 HOSHIZAKI CUBELET ICE DISPENSER DCM-500BAF MODEL DCM-500BWF DCM-750BAF DCM-750BWF SERVICE MANUAL 73071 MAR. 11, 1999 ISSUED: REVISED: DEC. 17, 2003...
  • 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

    This manual should be made available to the technician prior to installation, service or maintenance. I. SPECIFICATIONS ... 5 1. DCM-500BAF (Air-cooled) ... 5 2. DCM-500BWF (Water-cooled) ... 6 3. DCM-750BAF (Air-cooled) ... 7 4. DCM-750BWF (Water-cooled) ... 8 II.
  • Page 4 VI. REMOVAL AND REPLACEMENT OF COMPONENTS ... 50 1. SERVICE FOR REFRIGERANT LINES ... 50 [a] REFRIGERANT RECOVERY ... 50 [b] EVACUATION AND RECHARGE [R-404A] ... 50 2. BRAZING ... 51 3. REMOVAL AND REPLACEMENT OF COMPRESSOR ... 52 4. REMOVAL AND REPLACEMENT OF DRIER ... 53 5.

  • Page 5: Specifications

    I. SPECIFICATIONS 1. DCM-500BAF (Air-cooled) AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR FAN MOTOR AGITATING MOTOR DISPENSING MOTOR OTHERS MAXIMUM FUSE SIZE MAX. HACR BREAKER (USA ONLY) MAX. CIRC. BREAKER (CANADA ONLY) MINIMUM CIRCUIT AMPACITY APPROXIMATE ICE PRODUCTION PER 24 HR.

  • Page 6: Dcm-500Bwf (Water-Cooled)

    2. DCM-500BWF (Water-cooled) AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR AGITATING MOTOR DISPENSING MOTOR OTHERS 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 7: Dcm-750Baf (Air-Cooled)

    3. DCM-750BAF (Air-cooled) AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR FAN MOTOR AGITATING MOTOR DISPENSING 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 8: Dcm-750Bwf (Water-Cooled)

    4. DCM-750BWF (Water-cooled) AC SUPPLY VOLTAGE COMPRESSOR GEAR MOTOR AGITATING MOTOR DISPENSING 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 9: General Information

    II. GENERAL INFORMATION 1. CONSTRUCTION DCM-500BAF, DCM-750BAF...

  • Page 10: Dcm-500Bwf, Dcm-750Bwf

    DCM-500BWF, DCM-750BWF...

  • Page 11: Control Box Layout

    2. CONTROL BOX LAYOUT DCM-500BAF, DCM-500BWF...

  • Page 12: Dcm-500Bwf, Dcm-750Bwf

    DCM-750BAF, DCM-750BWF...

  • Page 13: Cabinet Stand

    3) Remove the Front Panel by lifting up and pulling toward you. 4) Place the ice dispenser on the Cabinet Stand. Combination: SD-450 ..DCM-500BAF, BWF SD-700 ..DCM-750BAF, BWF 5) You must secure the ice dispenser to the Cabinet Stand with four bolts (Cabinet Stand accessory).
  • Page 14 DIMENSIONS WITH DCM-500BAF ON SD-450 Unit: inch (mm.) Fig. 2...
  • Page 15 DIMENSIONS WITH DCM-750BAF ON SD-700 Unit: inch (mm.) Fig. 3...

  • Page 16: Technical Information

    III. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT DCM-500BAF...

  • Page 17: Dcm-500Bwf (Water-Cooled)

    DCM-500BWF...

  • Page 18: Dcm-750Baf (Air-Cooled)

    DCM-750BAF...

  • Page 19: Dcm-750Bwf (Water-Cooled)

    DCM-750BWF...

  • Page 20: Wiring Diagram

    2. WIRING DIAGRAM DCM-500BAF, DCM-500BWF...

  • Page 21: Dcm-750Baf, Dcm-750Bwf

    DCM-750BAF, DCM-750BWF...

  • Page 22: Sequence Of Electrical Circuit

    3. SEQUENCE OF ELECTRICAL CIRCUIT [a] When Power Switch and ICE MAKING SWITCH are moved to “ON” position, water starts to be supplied to Reservoir. [DCM-500] [DCM-750]...
  • Page 23 [b1] When Reservoir has been filled up, Gear Motor starts immediately. (Reservoir filled) [DCM-500] [DCM-750]...
  • Page 24 [b2] When Reservoir has been filled up, Gear Motor starts immediately. (Gear Motor starts) [DCM-750] [DCM-500]...
  • Page 25 [c] Compressor starts about 60 sec. after Gear Motor starts. [DCM-750] [DCM-500]...
  • Page 26 [d] Bin Control tripped. Compressor stops about 90 sec. later. Agitating Motor operates for about 0.6 sec. [DCM-750] [DCM-500]...
  • Page 27 [e] Gear Motor stops about 60 sec. after Compressor stops [DCM-500] [DCM-750]...
  • Page 28 CONTINUOUS DISPENSING [f1] Dispensing ice. (Bin Control still tripped) (Agitating Motor operates for 0.6 sec. every 12 sec.) [DCM-750] [DCM-500]...
  • Page 29 PORTION CONTROL DISPENSING [f2] Agitating Motor operates for 0.6 sec. when Ice Despensing Button is pushed, after a 12 sec. delay. Agitating Motor operates for 0.6 sec., and then 0.6 sec. every 12 sec. [DCM-500] [DCM-750]...
  • Page 30 [g] Dispensing water. (Bin Control still tripped). [DCM-500] [DCM-750]...
  • Page 31 [h] Low water. [DCM-500] [DCM-750]...
  • Page 32 [i] Switch Control Switch to drain. [DCM-500] [DCM-750]...
  • Page 33 [j] Flush Timer activates. [DCM-500] [DCM-750]...
  • Page 34 [k] When 208-230V are supplied to the Power Supply due to miswiring, Power Protect Relay operates, and the Ice Maker does not run. [DCM-500] [DCM-750]...
  • Page 35 [l] When high pressure causes the Pressure Switch to open, the Compressor stops immediately and the Gear Motor stops 60 sec. later. [DCM-500] [DCM-750]...

  • Page 36: Timing Chart

    4. TIMING CHART...

  • Page 37: Timer Board

    5. TIMER BOARD [a] SOLID-STATE CONTROL 1) A HOSHIZAKI exclusive solid-state control is employed in the DCM-500 and DCM-750 cubelet ice dispenser. This control includes a microprocessor (LSI) developed by HOSHIZAKI. 2) A Printed Circuit Board (hereafter called “Timer Board”) includes a stable and high quality control system.
  • Page 39 [c] SEQUENCE Bin Control Pressure Switch Ice Switch [portion controlled] Ice Switch [continuous] X1 Relay [Gear Motor] X2 Relay [Compressor Relay] X4 Relay [Agitating Motor] X5 Relay [Solenoid] [Dispensing Motor] r - i r - i n i t n i t...
  • Page 40 Functions of Relays 1) X1 - makes just when the Bin Control Circuit closes. - breaks t3 sec. after X2 breaks following the t2 sec. delay since the Bin Control Circuit opens. - will not make for t4 sec. after X2 breaks, even if the Bin Control Circuit closes. 2) X2 - makes t1 sec.

  • Page 41: Performance Data

    4. PERFORMANCE DATA DCM-500BAF (Air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal. / day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG (kg/cm²G) TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.
  • Page 42 DCM-500BWF (Water-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day ( kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. (TOTAL) gal. / day (kl/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG (kg/cm²G) TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.
  • Page 43 DCM-750BAF (Air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day (kg/day) APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day (l/day) EVAPORATOR OUTLET TEMP. °F (°C) HEAD PRESSURE PSIG (kg/cm²G) SUCTION PRESSURE PSIG ( kg/cm²G ) TOTAL HEAT OF REJECTION Note: The data without *marks should be used for reference.
  • Page 44 DCM-750BWF (Water-cooled) 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/cm²G) SUCTION PRESSURE PSIG ( kg/cm²G ) WATER FLOW FOR CONDENSER PRESSURE DROP OF COOLING WATER LINE Less than 7 PSIG HEAT OF REJECTION FROM CONDENSER HEAT OF REJECTION FROM COMPRESSOR...

  • Page 45: Adjustment Of Components

    IV. ADJUSTMENT OF COMPONENTS 1. ADJUSTMENT OF WATER REGULATING VALVE - WATER-COOLED MODEL ONLY The Water Regulating Valve, also called “WATER REGULATOR,” is factory-adjusted. No adjustment is required under normal use. Adjust the Water Regulator, if necessary, using the following procedures. 1) Attach a pressure gauge to the high-side line of the system.

  • Page 46: Service Diagnosis

    V. SERVICE DIAGNOSIS PROBLEM [1] The icemaker will a) Power Supply not start. b) Power Switch (Control Box) c) Fuse (Control Box) d) Door Switch (Control Box) [2] Ice dispensing a) Water Control Relay operates, but no ice is produced. b) Pressure Switch c) Compressor [3] Water Valve...
  • Page 47 PROBLEM b) Overload Protector c) Starter d) Starting or Running Capacitor e) X2 Relay on Timer Board Compressor g) Fan Motor [5] Poor ice production a) Condenser capacity. b) Expansion Valve c) Refrigerant Lines d) Installation Site POSSIBLE CAUSE Refrigerant overcharged.
  • Page 48 PROBLEM e) Inside Wall of Evaporator Water Supply Dispenser will not a) Bin Control stop even if Bin is filled with ice. Fan Motor will not a) Fan Motor start, or is not operating. b) X2 Relay on Timer Board Gear Motor (Ice a) Gear Motor Making) is not...
  • Page 49 PROBLEM Agitator Motor Dispensing Motor g) Solenoid (Shutter) h) Water Valve [11] Water does not a) Water Supply stop. b) Water Valve c) Float Switch d) Water Control Relay [12] No water or poor a) Water Supply flow. b) Water Valve c) Float Switch d) Water Control Relay [13] Much water drains...

  • Page 50: 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 Polyol Ester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the sys- tem when replacing or servicing parts.

  • Page 51: 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.

  • Page 52: 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 repair or replacement has been made. Note: When replacing a Compressor with a defective winding, be sure to install the new Start Capacitor and Start Relay supplied with the re placement Compressor.

  • Page 53: Removal And Replacement Of Drier

    12) Braze the Access, Suction and Discharge lines (Do not change this order), while purging with nitrogen gas flowing at the pressure 3-4 PSIG. 13) Install the new Drier. 14) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. 15) Connect the Terminals, and replace the Terminal Cover in its correct position.

  • Page 54: 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 repair or replacement has been made.

  • Page 55: Removal And Replacement Of Water Regulating Valve

    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 repair or replacement has been made. 1) Turn off the power supply.

  • Page 56: Removal And Replacement Of Evaporator Assembly

    7. REMOVAL AND REPLACEMENT OF EVAPORATOR ASSEMBLY 1) Drain the water from the Evaporator by switching the Flush Switch to “FLUSH” on the Control Box. 2) Unplug the icemaker. 3) Remove the panels. 4) Remove the three Thumbscrews and take off the Spout from the Evaporator. CUTTER 5) Loosen the Cutter by a wrench and remove it.
  • Page 57 11) Remove the Bulb of the Expansion Valve. 12) Disconnect the brazing-connections of the Expansion Valve and the Copper Tube- Low Side from the Evaporator, using brazing equipment. 13) Remove the two Truss Head Machine Screws and the Bracket securing the Evaporator.
  • Page 58 23) When replacing the Evaporator: (a) Braze the new Evaporator with nitrogen gas flowing at the pressure of 3-4 PSIG. (b) Replace the Drier. (c) Check for leaks using nitrogen gas (140 PSIG) and soap bubbles. (d) Evacuate the system. Charge it with refrigerant. See the Nameplate for required refrigerant charge and type.
  • Page 59 DCM-500B_F Evaporator Assembly...
  • Page 60 DCM-750B_F Evaporator Assembly...

  • Page 61: 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. 6) Replace the Fan Motor Bracket and the wire connectors.

  • Page 62: Removal And Replacement Of Float Switch

    10. REMOVAL AND REPLACEMENT OF FLOAT SWITCH 1. Fragile, handle very carefully. 2. If the Float Switch works poorly because of scale or other foreign matter, install a filter or softener in the water supply line. 1) Turn off the power supply. 2) Close the Water Supply Line Shut-off Valve.

  • Page 63: Removal And Replacement Of Electrical System

    5) Disconnect the Flush Water Valve from the tube connected to the plastic tee leading to the drain hose. 6) Disconnect the Terminals from the Flush Water Valve. 7) Remove the Flush Water Valve from the Frame or Bracket. 8) Connect the new Flush Water Valve back onto the Frame or Bracket. 9) Connect the tube from the plastic tee to the new Flush Water Valve.

  • Page 64: Removal And Replacement Of Dispensing System

    [b] STARTER 1) Turn off the power supply. 2) Remove the Front Panel. 3) Remove the Control Box Cover. 4) Disconnect the terminals from the Starter. 5) Remove the Starter. 6) Install the new Starter. The Starter is position-sensitive. Install it so that the arrow indication of the Starter can point upward.
  • Page 65 [b] AGITATING GEAR MOTOR 1) Turn off the power supply. 2) Remove the Front Panel. 3) Remove the Bin Front Panel. 4) Remove the Thumbscrews and pull off the Gear Motor Bracket. Note: Hold the Agitator so as not to drop it when pulling off the Gear Motor Bracket. 5) Remove the Packing, three flat head screws and Plastic Guide.

  • Page 66: Cleaning And Maintenance Instructions

    VII. MAINTENANCE AND CLEANING INSTRUCTIONS Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. 1. PREPARING THE ICE DISPENSER FOR LONG STORAGE When shutting off the ice dispenser for an extended time, drain out all water from the water line and remove the ice from the Storage Bin.
  • Page 67 5) Press the Push Button to dispense ice, and remove all ice from the Storage Bin. 6) Move the Ice Switch to the “ON” position and unplug the machine. 7) Remove the Upper Front Panel. 8) Turn off the Power Switch. 9) Clean the Storage Bin.

  • Page 68: Cleaning Instructions

    2. CLEANING INSTRUCTIONS Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. [a] WATER SYSTEM 1. Clean and sanitize the ice dispenser Water System at least twice a year, by using a recommended cleaner and sanitizer. 2.
  • Page 69 8) Wait for 10 minutes before starting the icemaking process. Then turn on the Power Switch and move the Control Switch to the “ICE” position. Run the ice dispenser until it stops automatically. Note: This ice dispenser will not run without the Front Panel. Replace the Top Panel and the Front Panel.

  • Page 70: [B] Storage Bin

    Then remove the Agitator(s) and the Dispensing Auger. See Fig. 6. Note: Models DCM-750BAF and BWF are provided with two Agitators, and models DCM-500BAF and BWF with one Agitator. 3) Remove the Bin Control Bracket Assembly. See Fig. 7 4) Remove the Snap Pin, the Shaft and the Activator.
  • Page 71 6. Remove the Spout Cover and, the black Ice Dispensing Spout and the Water Dispensing Nozzle. See Fig. 9. 7) Immerse the parts removed in the above steps 2) through 6) in the cleaning and sanitizing solution for about 15 minutes each. 8) Rinse these parts thoroughly with clean water.

  • Page 72: [C] Water Valve

    [c] WATER VALVE If the Filter in the Water Valve becomes clogged with sediment or dirt, the water supply will be stopped and ice cannot be made. Disassemble the Water Valve and clean out the Filter once every two months. 1) Unplug the ice dispenser 2) Close the water supply tap.

  • Page 73: [D] Strainer

    [d] STRAINER (Optional Extra) 1) Necessary Parts Strainer Part No. 311166A01 The above part has the following components: PART NAME Strainer Body Filter Strainer Cap Packing Joint 2) Installation Method (1) Attach the Strainer in the water supply line so that the arrow indication can match the actual water flow direction.
  • Page 74 1) Turn off the power supply. 2) Close the Water Supply Line Shut-off Valve. 3) Open the Drain Valve and drain the water from the water supply line. 4) Close the Drain Valve. 5) Unscrew the Strainer Cap and remove the Filter inside. 6) Use a nylon brush to clean the Filter of all grime, scale, and so on.

  • Page 75: Maintenance Instructions

    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, soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up.
  • Page 76 4) Condenser (Air-cooled model only) Check the Condenser once a year, and clean if required by using a brush or vacuum cleaner. More frequent cleaning may be required depending on the location of the ice dispenser. 5) Water System Drain out all water from the Water System at least once a week. Fig.

This manual is also suitable for:

Dcm-750bafDcm-500bwfDcm-750bwf

Table of Contents