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Hoshizaki DIM-30DE-1 Service Manual

Cube ice dispenser
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Download this manual See also: Instruction Manual
NO.
E2HA-917
ISSUED: OCT. 10, 2013
REVISED:
HOSHIZAKI
CUBE ICE DISPENSER
DIM-30DE-1
MODEL
SERVICE MANUAL

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Summary of Contents for Hoshizaki DIM-30DE-1

  • Page 1 NO. E2HA-917 ISSUED: OCT. 10, 2013 REVISED: HOSHIZAKI CUBE ICE DISPENSER DIM-30DE-1 MODEL SERVICE MANUAL...

  • Page 2: Table Of Contents

    CONTENTS PAGE I. SPECIFICATIONS -------------------------------------------------------------------------------------1 1. DIMENSIONS/CONNECTIONS ----------------------------------------------------------------1 II. GENERAL INFORMATION -------------------------------------------------------------------------2 1. CONSTRUCTION ----------------------------------------------------------------------------------2 [a] OVERVIEW --------------------------------------------------------------------------------------2 [b] WATER CIRCUIT AND MACHINE COMPARTMENT ---------------------------------3 2. CONTROLLER BOARD --------------------------------------------------------------------------4 [a] CONTROLLER BOARD LAYOUT ---------------------------------------------------------5 [b] BEFORE CHECKING CONTROLLER BOARD ----------------------------------------6 [c] SEQUENCE - LED INDICATORS ON/OFF PATTERN -------------------------------7 [d] FAULT DIAGNOSIS ---------------------------------------------------------------------------8 [e] CONTROLS AND ADJUSTMENT ------------------------------------------------------- 10...
  • Page 3 [d] AIR GUIDE ------------------------------------------------------------------------------------- 27 [e] REFRIGERATOR COVERS --------------------------------------------------------------- 28 [f] SWITCH BOX ---------------------------------------------------------------------------------- 28 2. SERVICE FOR REFRIGERANT LINES ---------------------------------------------------- 29 [a] SERVICE INFORMATION ----------------------------------------------------------------- 29 [b] REFRIGERANT RECOVERY ------------------------------------------------------------- 30 [c] EVACUATING AND RECHARGE -------------------------------------------------------- 30 3. COMPRESSOR ----------------------------------------------------------------------------------- 31 4.

  • Page 4: Specifications

    I. SPECIFICATIONS 1. DIMENSIONS/CONNECTIONS...

  • Page 5: General Information

    II. GENERAL INFORMATION 1. CONSTRUCTION [a] OVERVIEW Front Panel (Upper) Front Panel (Lower) Push Button Pilot Lamp Spout Power Switch Ice Station Switch Cover Air Filter Louver Power Cord...

  • Page 6: [B] Water Circuit And Machine Compartment

    [b] WATER CIRCUIT AND MACHINE COMPARTMENT Water Supply Inlet Evaporator Water Valve Water Tank Water Supply Pipe Drain Pan Pump Motor Actuator Motor Bin Control Switch Auger Gear Motor Transformer Drain Outlet Drain Hose Control Box Compressor Power Switch Fan Motor Cover Condenser...

  • Page 7: Controller Board

    2. CONTROLLER BOARD IMPORTANT If receiving a service call, ask the user to turn off the power to the ice dispenser and turn it on again, while watching the ice dispenser. This will reset the controller, and in some cases normal operation will resume. CAUTION 1.

  • Page 8: [A] Controller Board Layout

    The layout of the main inputs and outputs (connectors etc.) of the Controller Board is as shown below. [a] CONTROLLER BOARD LAYOUT DSW 5 (Code Setting 1) Input Connector (Cube Control Thermistor) DSW 4 (Water Supply) Input Connector (Ambient Temp Thermistor) DSW 1 (Dimple) DSW 2 (Harvest) Service Call Lamp...

  • Page 9: [B] Before Checking Controller Board

    [b] BEFORE CHECKING CONTROLLER BOARD Check the power source voltage and the components as shown in the table below. Component Procedure Normal 1. Actuator Toggle Manually set the switch in the FREEZE DEFROST Switch and DEFROST positions, and check the COM-NO Open continuity.

  • Page 10: [C] Sequence - Led Indicators On/Off Pattern

    [d] SEQUENCE [c] SEQUENCE - LED INDICATORS ON/OFF PATTERN X1: OFF X1: OFF X2: ON Water Supply X2: ON Timer X3: OFF X1: ON X3: ON X2: OFF Freeze Backup Timer X3: OFF Freeze Cycle Water Pan Timer Water Pan Water Pan (initial cycle only) opens...

  • Page 11: [D] Fault Diagnosis

    If on the first cycle, check out the cam operation and/or toggle switch. If the machine has been in service for some time, the controller board may be at fault. REMEMBER: Hoshizaki controllers are very reliable. They also control every component’s operation. So if a component malfunctions, the controller will respond.
  • Page 12 INTERLOCK WATER TANK PATTERN POSSIBLE CAUSE REMEDY INDICATOR POSITION Clean or replace Clogged air filter and/or condenser Replace Water leak from water Freeze Cycle solenoid valve Leak Replace Gas leak from hot gas solenoid valve Gas Leak Replace Fan motor stopped Check for leak Gas leak Replace comp.

  • Page 13: [E] Controls And Adjustment

    [e] CONTROLS AND ADJUSTMENT 1) Cube Control (DSW1) A cube control on the controller board is factory adjusted to produce constant cubes all year around. When the user needs ice cubes with smaller or larger diameter holes, adjust the rotary switch DSW1 (cube control) using a miniature Phillips screwdriver. CAUTION When adjusting the rotary switch DSW1 for smaller dimple cubes, it may be necessary to also increase the water supply time to melt away fragments...
  • Page 14 3) Water Supply Control (DSW4) When adjusting the rotary switch DSW1 (cube control) for smaller dimple cubes, it may be necessary to adjust the water supply time setting as well, following the instruction be- low. Note: Any adjustment will not be required under normal use. If an insufficient water supply results in production of cloudy ice, check to see if the filter of the water valve is clogged or water pressure is reduced.

  • Page 15: Operating Instructions

    III. OPERATING INSTRUCTIONS 1. IN CASE OF LOW WATER 1) Remove the switch cover, and turn off the power switch. Lift off 2) Close the water tap. 3) Unlock the front panel (upper) by turning Unlock the hook counterclockwise with a flat blade screwdriver.

  • Page 16: Maintenance

    IV. MAINTENANCE WARNING 1. Before carrying out any cleaning or maintenance operations, unplug the ice dispenser from the electrical supply network. 2. A trained service person should clean and sanitize the ice dispenser water system at least twice a year. The condenser should be checked and cleaned at least once a year.

  • Page 17: Drain Pan, Storage Bin, Front Panel (Upper)

    3. DRAIN PAN, STORAGE BIN, FRONT PANEL (UPPER) 1) Follow the steps 1) to 3) in “III. 2. PREPARING THE ICE DISPENSER FOR LONG STORAGE.” 2) Pull out the drain pan hose from the drain hole in the storage bin. 3) Remove the thumbscrew at the front, and take out the drain pan from the storage bin.

  • Page 18: Water Valve

    5. WATER VALVE 1) Unplug the ice dispenser or disconnect the power source. 2) Close the water supply tap. 3) Remove the top panel and front panel (upper). 4) Disconnect the fitting nut from the water valve. 5) Remove the mesh filter from the water valve. 6) Clean the mesh using a brush.

  • Page 19: Technical Information

    V. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT Capillary Tube Evaporator Water Accumulator Valve Controller Actuator Board Motor Pump Motor Bin Control Switch Ice Station Water Tank Trap Drain Pan Storage Bin Drain Outlet U Trap Condenser Hot Gas Drier Valve Motor...

  • Page 20: Wiring Diagram

    2. WIRING DIAGRAM...

  • Page 21: Timing Chart

    3. TIMING CHART [a] NORMAL OPERATION * Gear motor operates at any time while push button is pressed.

  • Page 22: [B] Bin Control

    [b] BIN CONTROL * Gear motor operates at any time while push button is pressed.

  • Page 23: Sequence

    4. SEQUENCE 1) When the water supply tap is opened and the unit is energized, the hot gas valve opens to let hot gas flow and the actuator motor starts to open the water pan. When the cam pushes down the actuator toggle switch lever to the left, the hot gas valve closes and the actuator motor starts to turn in the reverse direction.
  • Page 24 4) As the unit repeats the above freeze and defrost cycles, the storage bin is gradually filled with ice. When a certain level is reached, the bin control switch (microswitch to shut off the circuit) detects the ice cubes to shut down the unit. When the storage level decreases, another freeze cycle starts.

  • Page 25: Performance Data

    5. PERFORMANCE DATA Standard ice production capacity: 600 g/cycle Standard water valve flow rate: 3.8 L/min (Water pressure: 2 kg/cm 50Hz Average ice cube hole diameter: 5 ± 1 mm 10/10 21/15 32/21 38/32 Ambient Temp./Water Temp. (°C) 29.5 22.5 20.0 10/10 21/15...

  • Page 26: Service Diagnosis

    VI. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION PROBLEM CHECK POSSIBLE CAUSE REMEDY [1] The ice a) Power source 1. OFF position. 1. Move to ON position. dispenser will 2. Loose connections. 2. Tighten. not start. 3. Bad contacts. 3. Check for continuity and replace.
  • Page 27 PROBLEM CHECK POSSIBLE CAUSE REMEDY [2] (Continued) f) Air filter, 1. Clogged. 1. Clean. condenser [3] Compressor a) Control circuit 1. Loose connection or 1. Repair or replace. runs, but other broken wire. components will not start. [4] Fan motor will a) Wiring 1.

  • Page 28: Low Ice Production

    PROBLEM CHECK POSSIBLE CAUSE REMEDY [9] Water pan will a) See [8] above. not close. b) Hot gas valve 1. Defective. 1. Replace. 2. LOW ICE PRODUCTION PROBLEM CHECK POSSIBLE CAUSE REMEDY [1] Freeze cycle a) Water supply 1. Low pressure. 1.

  • Page 29: Others

    PROBLEM CHECK POSSIBLE CAUSE REMEDY [2] (Continued) b) Water quality 1. High hardness or contains 1. Install a water filter or impurities. scale treatment. 2. Lime is deposited inside 2. Clean. cooling water tubing. c) Water valve 1. Clogged. 1. Clean. d) Water system 1.

  • Page 30: Removal And Replacement

    VII. REMOVAL AND REPLACEMENT OF COMPONENTS 1. PANELS [a] FRONT PANEL (UPPER) 1) Unlock the front panel (upper) by turning the hook counterclockwise with a flat blade screwdriver. Lift off the front panel (upper). See Fig. 1. 2) To refit the front panel (upper), push down the top while turning the hook clockwise. See Fig.

  • Page 31: [E] Refrigerator Covers

    1) Remove the four machine screws securing the air guide to the cabinet. 2) To refit the air guide, reverse the above procedure. [e] REFRIGERATOR COVERS The refrigerator covers (A) and (B) are located on top of the machine compartment as partitions and fitted with the control box.

  • Page 32: Service For Refrigerant Lines

    2. SERVICE FOR REFRIGERANT LINES [a] SERVICE INFORMATION 1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R134a] The compressor must not be opened more than 30 minutes in replacement or service. Do not mix lubricants of different compressors even if both are charged with the same refrigerant, except when they use the same lubricant.

  • Page 33: [B] Refrigerant Recovery

    7) Evacuation, Vacuum Pump and Refrigerant Charge [R134a] Never allow the oil in the vacuum pump to flow backward. The vacuum level and vacuum pump may be the same as those for the current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for R134a.

  • Page 34: Compressor

    Note: Always charge in the liquid stage, as many refrigerants are blends and vapour charging will affect the blend consistency. 7) Turn on the ice dispenser. Release the high-side access connector, and allow pressure in the charging line to slowly enter the low side of the system. Cap off the high-side access valve.

  • Page 35: Drier

    17) Replace the front panel and rear mesh in their correct positions. 18) Plug in the ice dispenser or connect the power source. Note: Hoshizaki recommends that compressor starting electrics are always replaced at the same time as the compressor.

  • Page 36: Evaporator

    9) Replace the rear mesh in its correct position. 10) Plug in the ice dispenser or connect the power source. Note: Always use a drier of the correct capacity and refrigerant type. 5. EVAPORATOR IMPORTANT Always install a new drier every time the sealed refrigeration system is opened.

  • Page 37: Hot Gas Valve

    6. HOT GAS VALVE IMPORTANT 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) Unplug the ice dispenser or disconnect the power source. 2) Remove the rear mesh panel.

  • Page 38: Water Pan Assembly

    7. WATER PAN ASSEMBLY 1) Remove the top panel and front panel (upper). 2) Remove the front panel (lower), and push the reset switch on the control box to open the water pan. 3) Unplug the ice dispenser or disconnect the power source. 4) Disconnect the pump motor leads in the wiring channel.

  • Page 39: Pump Motor

    8. PUMP MOTOR 1) Unplug the ice dispenser or disconnect the power source. 2) Remove the top panel and front panel (upper). 3) Disconnect the pump motor leads in the wiring channel. 4) Remove screws and the pump motor from the bracket. 5) Disconnect the pump suction and discharge tubings.

  • Page 40: Actuator Motor

    10. ACTUATOR MOTOR 1) Remove the top panel and front panel (upper). 2) Remove the front panel (lower), and push the reset switch on the control box to open the water pan. 3) Unplug the ice dispenser or disconnect the power source. 4) Remove the extension spring (actuator motor side) from the cam arm.

  • Page 41: Actuator Toggle Switch

    5) Remove the split pin from the cam shaft. 6) Remove the cam arm (B). 7) Install the new cam in the reverse order of the removal procedure. 8) Replace the panels in their correct positions. 9) Plug in the ice dispenser or connect the power source. 12.
  • Page 42 Fig. 12...

  • Page 43: Controller Board

    ICEMAKING ASSEMBLY AND CAM MECHANISM INDEX NO. DESCRIPTION Water Pan Assembly Actuator Motor Actuator Motor Bracket Cam Arm (A) Cam Arm (B) Cam Shaft Actuator Toggle Switch Switch Washer Switch Cover Cam Shaft Holder Water Pan Hanger Bracket (A) Water Pan Hanger Bracket (B) Spring Pin Extension Spring Bracket...

  • Page 44: [B] Replacement

    2) Modify the service board referring to the instruction sheet attached. [b] REPLACEMENT 1) Unplug the ice dispenser or disconnect the power source. 2) Remove the front panel (lower). 3) Remove screws and the control box cover. 4) Pull out and remove the controller board from the control box. 5) Install the new controller board and reassemble the control box in the reverse order of the removal procedure.

  • Page 45: Thermistor For Cube Control

    14. THERMISTOR FOR CUBE CONTROL 1) Unplug the ice dispenser or disconnect the power source. 2) Remove the top panel, front panel and pipe cover (rear). 3) Remove the connector K4 on the controller board, referring to “13. [b] REPLACEMENT.” 4) Unscrew and remove the thermistor holder and thermistor, located on the evaporator (front side).

  • Page 46: Fan Motor

    15. FAN MOTOR 1) Unplug the ice dispenser or disconnect the power source. 2) Remove the front panel (lower). 3) Remove the control box and air guide. 4) Disconnect the connector of the fan motor. 5) Remove the fan motor bracket and the fan motor. 6) Cut the leads of the fan motor allowing enough lead length to reconnect using closed end connectors.

  • Page 47: Bin Control Switch

    Machine Screw (Motor Bracket) Motor Bracket Machine Screw (Ice Guide) Machine Screw (Motor) Ice Guide Auger Gear Motor Spring Pin Joint Motor Cover View with motor cover removed Fig. 15 17. BIN CONTROL SWITCH 1) insert a flat blade screwdriver between the switch case and switch base, and lightly pry the switch case off.

  • Page 48: Transformer

    18. TRANSFORMER 1) Unplug the ice dispenser. 2) Remove the transformer cover and the transformer. 3) Cut the transformer leads at the wire connectors. 4) Install the new transformer. 5) Assemble the removed parts in the reverse order of which they were removed. 6) Plug in the ice dispenser.

  • Page 49: Push Button Switch And Pilot Lamp

    20. PUSH BUTTON SWITCH AND PILOT LAMP 1) Unplug the ice dispenser. 2) Remove the front panel (upper) and front panel (lower). If the push button switch does not require replacement, skip 3) - 11). 3) Remove the connectors to the push button Push Button Plunger Supporter...

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