Hoshizaki FM-120KE-HC Service Manual
  1. Manuals
  2. Brands
  3. Hoshizaki Manuals
  4. Ice Maker
  5. FM-120KE-HC
  6. Service manual

Hoshizaki FM-120KE-HC Service Manual

Self-contained ice maker
Hide thumbs Also See for FM-120KE-HC:
Table of Contents

Advertisement

Quick Links

SELF-CONTAINED ICE MAKER
SERVICE MANUAL
FM-120KE-HC
FM-120KE-HCN
FM-120KE-50-HC
FM-120KE-50-HCN
FM-80KE-HC
FM-80KE-HCN
F114-992 (053118)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the FM-120KE-HC and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Hoshizaki FM-120KE-HC

Summary of Contents for Hoshizaki FM-120KE-HC

  • Page 1 SELF-CONTAINED ICE MAKER FM-120KE-HC FM-120KE-HCN FM-120KE-50-HC FM-120KE-50-HCN FM-80KE-HC FM-80KE-HCN SERVICE MANUAL F114-992 (053118)

  • Page 2: Table Of Contents

    CONTENTS PAGE I. SPECIFICATIONS --------------------------------------------------------------------------------------- 1 1. DIMENSIONS/SPECIFICATIONS ------------------------------------------------------------------- 1 [a] FM-120KE-HC ---------------------------------------------------------------------------------------- 1 [b] FM-120KE-HCN ------------------------------------------------------------------------------------- 2 [c] FM-120KE-50-HC ----------------------------------------------------------------------------------- 3 [d] FM-120KE-50-HCN --------------------------------------------------------------------------------- 4 [e] FM-80KE-HC ----------------------------------------------------------------------------------------- 5 [f] FM-80KE-HCN --------------------------------------------------------------------------------------- 6 2. CONSTRUCTION ---------------------------------------------------------------------------------------- 7 [a] FM-120KE-HC(N), FM-120KE-50-HC(N)------------------------------------------------------ 7 [b] FM-80KE-HC(N) ------------------------------------------------------------------------------------- 8 II.
  • Page 3 6. PROTECTORS ----------------------------------------------------------------------------------------- 30 [a] INDICATION ---------------------------------------------------------------------------------------- 30 7. ERROR CODES --------------------------------------------------------------------------------------- 31 8. PERFORMANCE DATA ------------------------------------------------------------------------------ 33 [a] FM-120KE-HC, FM-120KE-50-HC ------------------------------------------------------------ 33 [b] FM-120KE-HCN, FM-120KE-50-HCN-------------------------------------------------------- 34 [c] FM-80KE-HC --------------------------------------------------------------------------------------- 35 [d] FM-80KE-HCN ------------------------------------------------------------------------------------- 36 IV. SERVICE DIAGNOSIS ------------------------------------------------------------------------------- 37 1.

  • Page 4: Specifications

    I. SPECIFICATIONS 1. DIMENSIONS/SPECIFICATIONS [a] FM-120KE-HC...

  • Page 5: [B] Fm-120Ke-Hcn

    [b] FM-120KE-HCN...

  • Page 6: [C] Fm-120Ke-50-Hc

    [c] FM-120KE-50-HC...

  • Page 7: [D] Fm-120Ke-50-Hcn

    [d] FM-120KE-50-HCN...

  • Page 8: [E] Fm-80Ke-Hc

    [e] FM-80KE-HC...

  • Page 9: [F] Fm-80Ke-Hcn

    [f] FM-80KE-HCN...

  • Page 10: Construction

    2. CONSTRUCTION [a] FM-120KE-HC(N), FM-120KE-50-HC(N) Bin Control Switch Reservoir Control Water Valve Evaporator Control Box Compressor Gear Motor Flush Water Valve Fan Motor Air-Cooled Condenser...

  • Page 11: [B] Fm-80Ke-Hc(N)

    [b] FM-80KE-HC(N) Bin Control Switch Control Water Reservoir Valve Control Box Evaporator Compressor Gear Motor Flush Water Valve Fan Motor Air-Cooled Condenser...

  • Page 12: Maintenance And Cleaning Instructions

    This information is provided on the label attached to the front panel and in the instruction manual. But instruct the user to contact a Hoshizaki service agent for replacement as soon as the display starts flashing “PC”.

  • Page 13: Extruding Head (Upper Bearing), Housing (Lower Bearing)

    After replacing the extruding head and mechanical seal: 1) Reset the compressor operating hours in accordance with “III. 5. [f] RESETTING COMPRESSOR OPERATING HOURS”. The “PC” indication on the display goes off. 2) Record the date of replacement on the label attached to the front panel. Operating Hours “PC”...

  • Page 14: Gear Motor

    Note: The water leakage will exceed the above amount with scale/dirt build up or damage on the mating surface. Replace the mechanical seal when the water leakage exceeds 0.5 mL/h. 4. GEAR MOTOR After the following hours of operation, check the gear motor for excessive noise caused by increased torque or deterioration of mechanical parts.

  • Page 15: Control Water Valve

    7. CONTROL WATER VALVE 1) Disconnect the power source. 2) Close the water supply tap. 3) Disconnect the inlet hose from the water valve. 4) Clean the filter packing using a brush. 5) Replace the filter packing and inlet hose in their correct positions. 6) Open the water supply tap.

  • Page 16: Cleaning Of Water System

    8. CLEANING OF WATER SYSTEM WARNING 1. HOSHIZAKI recommends cleaning this unit at least twice a year. More frequent cleaning, however, may be required in some existing water conditions. 2. Do not touch the operation switch with damp hands. 3. Always wear rubber gloves, eye protectors, apron, etc. for safe handling of the cleaner and sanitiser.
  • Page 17 3) Remove all ice from the storage bin to avoid contamination by the cleaner. 4) Unplug the icemaker. Remove the top and front panels. 5) Remove the cover of the reservoir. Remove any loose debris or scale. 6) Carefully fill the reservoir with the solution to the overflow point. If necessary, use a small brush to clean the inside of the reservoir.
  • Page 18 19) Immerse these parts in the sanitizing solution for about 15 minutes. 20) Rinse these parts thoroughly with clean water. IMPORTANT If the solution is left on these parts, they will corrode. 21) Refit the removed parts in reverse order. 22) Close the water supply tap.

  • Page 19: Technical Information

    III. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT [a] FM-120KE-HC(N), FM-120KE-50-HC(N) CONTROL WATER VALVE RESERVOIR WATER VALVE EXPANSION VALVE WATER EVAPORATOR SUPPLY FLUSH GEAR MOTOR WATER VALVE DRAIN PAN DRIER FAN MOTOR DRAIN PRESSURE SWITCH COMPRESSOR CONDENSER AIR-COOLED Pressure switch Cut-out 2.26 + 0.15/0 MPa...

  • Page 20: [B] Fm-80Ke-Hc(N)

    [b] FM-80KE-HC(N) CONTROL WATER VALVE RESERVOIR WATER VALVE WATER EVAPORATOR SUPPLY FLUSH GEAR MOTOR WATER VALVE DRAIN PAN CAPILLARY DRIER TUBE FAN MOTOR DRAIN PRESSURE SWITCH COMPRESSOR CONDENSER AIR-COOLED Pressure switch Cut-out 2.26 + 0.15/0 MPa Cut-in 1.57 ±0.15 MPa...

  • Page 21: Wiring Diagram

    2. WIRING DIAGRAM [a] WIRING DIAGRAM SET No. GR/Y PROTECTION -LINE 6A [(XA)] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SURGE ABSORBER (VARISTOR) START CAP. X5 F SURGE ABSORBER (LIGHTNING ARRESTER) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 [(XA)] THERMAL STARTER...

  • Page 22: [B] Control Box Layout

    [b] CONTROL BOX LAYOUT CONTROLLER BOARD - MAIN CONTROLLER BOARD - OPERATION POWER RELAY (CONTROL WATER VALVE, ON BOARD) POWER RELAY (FLUSH WATER VALVE, ON BOARD) POWER RELAY (GEAR MOTOR, ON BOARD) POWER RELAY (COMPRESSOR, ON BOARD) POWER RELAY (GM DRIVE DETECTOR) OPERATION SWITCH CIRCUIT PROTECTOR (6A) SURGE ABSORBER (LIGHTENING ARRESTER)

  • Page 23: Icemaking Mechanism

    3. ICEMAKING MECHANISM Sealing Bolt FM-80KE-HC FM-120KE(-50)-HC Cutter FM-80KE-HCN FM-120KE(-50)-HCN Flange Extruding Head Cutter Extruding Evaporator Head Screw Hex Head Bolt w/Washer Auger O-Ring Housing Ring Coupling - Spline Mechanical Seal Gear Motor...

  • Page 24: [A] Evaporator (Casing)

    [a] EVAPORATOR (CASING) The evaporator consists of a stainless steel icemaking cylinder coiled with a refrigeration pipe and wrapped together with a polyurethane foam insulation material. Water coming from the inlet into the evaporator will be frozen into ice. The ice spout is located on top of the evaporator.

  • Page 25: [H] Belt Heater

    [h] BELT HEATER (provided on some models) The belt heater is provided to reduce the load of ice passing the extruding head during a freeze cycle and to prevent vapor lock during a flush cycle. [i] REMOVABLE FLANGE The flange used to be welded on the evaporator to fix the spout. But sometimes the extruding head applies excessive load on the evaporator to compress ice, resulting in breaking the welded joints.

  • Page 26: Electric Circuit

    4. ELECTRIC CIRCUIT CAUTION Reassemble all the components as they were after servicing the unit according to a service call. [a] BASIC OPERATION The icemaker starts water supply when the operation switch is moved to the “ON” position. On completion of water supply, the gear motor starts immediately. After 5 minutes the compressor starts to begin icemaking operation.

  • Page 27: [B] Timing Chart

    [b] TIMING CHART...

  • Page 28: Operation Board

    5. OPERATION BOARD [a] OPERATION BUTTONS ICE = When pressed in the STOP mode, the unit is supplied with water and starts icemaking operation. STOP = When pressed in the ICE mode, the unit stops icemaking operation and drains. MAINTENANCE A = Used for various maintenance operations. MAINTENANCE B = Used for model code setting.

  • Page 29: [C] Displaying Compressor Operating Hours, Cycle Time, Model Number And Software Version

    2) 4) [c] DISPLAYING COMPRESSOR OPERATING HOURS, CYCLE TIME, MODEL NUMBER AND SOFTWARE VERSION Press and hold the maintenance A button, and press the ice button. The display shows the following items one by one every time the ice button is pressed. This function is available in the ice or stop mode.
  • Page 30 Note: 1. The display shows the next item if the ice button is pressed before one item appears in the display. 2. The display mode is cancelled if the maintenance A button is released. 3. The software version is displayed repeatedly while the maintenance A button is pressed. Release the maintenance A button to cancel the display mode.

  • Page 31: [D] Displaying Error Log

    For accurate measurement, use a container to receive ice actually produced for 10 minutes, measure its weight, and calculate ice production per day. Repeat this three times to figure out the average. c) Model Number The display shows two digits. e.g.

  • Page 32: [E] Resetting Error Log

    [e] RESETTING ERROR LOG With the operation switch in the “OFF” position, press and hold the stop and maintenance A buttons. Move the operation switch to the “ON” position. Release the buttons when the display shows the ice mode. Now the error log is reset. Do not reset more than necessary. [f] RESETTING COMPRESSOR OPERATING HOURS Note: This operation should be performed only when the display shows “PC”.

  • Page 33: [G] Reducing Compressor Starting Time

    [g] REDUCING COMPRESSOR STARTING TIME With the power switch turned off, press and hold the maintenance A button. Move the operation switch to the “ON” position. Release the button when the display shows the ice mode. The compressor starts in 30 seconds after the water supply cycle ends. 6.

  • Page 34: Error Codes

    7. ERROR CODES Interlock Errors Code Error Condition Operation Reset Check/Repair Water leak from water circuit (reservoir, inlet hose, outlet Icemaking Water c0 error occurs 2 times in Whole unit Power supply, Turn hose, hose joint, mechanical Leak a row. stops.
  • Page 35 Non-Interlock Errors Code Error Condition Operation Reset Check/Repair Error records Microcomputer Microcomputer fails to Memory circuit not Replace controller and compressor Time Read/Write read/write properly. available. board. operating hours not “- -” Error available on display Water leak from After initial water supply, Whole unit stops.

  • Page 36: Performance Data

    8. PERFORMANCE DATA [a] FM-120KE-HC, FM-120KE-50-HC 0.16 0.14 0.12 0.10 0.08 0.06 1400 1200 1000 The horizontal axis shows the ambient temperature. It refers to the data of at/wt = 10/10, 21/15, 32/21, 40/35.

  • Page 37: [B] Fm-120Ke-Hcn, Fm-120Ke-50-Hcn

    [b] FM-120KE-HCN, FM-120KE-50-HCN 0.14 0.12 0.10 0.08 0.06 0.04 1400 1200 1000 The horizontal axis shows the ambient temperature. It refers to the data of at/wt = 10/10, 21/15, 32/21, 40/35.

  • Page 38: [C] Fm-80Ke-Hc

    [c] FM-80KE-HC 0.09 0.08 0.07 0.06 0.05 1.45 1.35 1400 1200 1000 The horizontal axis shows the ambient temperature. It refers to the data of at/wt = 10/10, 21/15, 32/21, 40/35.

  • Page 39: [D] Fm-80Ke-Hcn

    [d] FM-80KE-HCN 0.09 0.08 0.07 0.06 0.05 0.04 1.45 1.35 1400 1200 1000 The horizontal axis shows the ambient temperature. It refers to the data of at/wt = 10/10, 21/15, 32/21, 40/35.

  • Page 40: Service Diagnosis

    IV. SERVICE DIAGNOSIS Display error records by operating the operation board (see “III. 5. [d] DISPLAYING ERROR LOG”). Check for a possible cause and service the unit. 1. NO ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] The icemaker will a) Power supply 1.
  • Page 41 PROBLEM POSSIBLE CAUSE REMEDY [3] (Continued) d) Pressure switch, 1. Dirty condenser fins. 1. Clean. condenser 2. Ambient temperature 2. Check for recommended thermistor too warm. temperature. 3. Fan not rotating. 3. Replace. 4. Condenser water 4. Check and get recommended pressure too low or pressure.

  • Page 42: Low Ice Production

    2. LOW ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] Low ice production a) Refrigerant line 1. Gas leaks. 1. See 1 - [5] - a). 2. Refrigerant line 2. Replace the clogged clogged. component. 3. Overcharged. 3. Recharge. b) High-side pressure 1.
  • Page 43 PROBLEM POSSIBLE CAUSE REMEDY [2] Overflow from a) Water supply 1. Water pressure too 1. Install a pressure reducing reservoir (Water high. valve. does not stop.) b) Water valve 1. Diaphragm does not 1. Clean or replace. close. c) Float switch 1.

  • Page 44: Removal And Replacement

    V. REMOVAL AND REPLACEMENT WARNING Only trained service engineer can service the R290 refrigeration unit. 1. SERVICE FOR REFRIGERANT LINES [a] SERVICE INFORMATION 1) Allowable Compressor Opening Time and Prevention of Lubricant Mixture [R290] 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 45: [B] Refrigerant Recovery

    7) Evacuation, Vacuum Pump and Refrigerant Charge [R290] 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 R290.

  • Page 46: Welding Repair For R290 Refrigeration Circuit

    4) Close the low-side and high-side valves on the service manifold. 5) Disconnect the vacuum pump, and attach a refrigerant charging cylinder to accurately weigh in the liquid charge. Remember to purge any air from the charging hose. See the nameplate for the required refrigerant charge.

  • Page 47: Compressor

    WARNING Remove the R290 refrigerant from the unit in an area well-ventilated and free from open flames. Note: Attach an access valve for recharging the unit charged by a lock ring. 3. COMPRESSOR 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.

  • Page 48: Drier

    12) Braze the access, suction and discharge pipes (Do not change this order) with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar. WARNING Always protect the compressor body around the suction pipe by using a damp cloth to prevent the inner plastic parts from overheating.

  • Page 49: Expansion Valve

    WARNING When it is required to disconnect the pipes using brazing equipment, be careful that the refrigerant in the oil left inside the pipes may burn. 5) Install the new drier with the arrow on the drier in the direction of the refrigerant flow. Use nitrogen gas at the pressure of 0.2 - 0.3 bar when brazing the tubings.

  • Page 50: Water Regulating Valve - Water-Cooled Model Only

    WARNING Always protect the valve body by using a damp cloth to prevent the valve from overheating. Do not braze with the valve body exceeding 120°C. 7) Install the new drier (See “4. DRIER”). 8) Check for leaks using nitrogen gas (10 bar) and soap bubbles. 9) Evacuate the system, and charge it with refrigerant.

  • Page 51: Evaporator Assembly

    7) Remove the screws and the valve from the bracket. 8) Install the new valve, and braze the capillary tube. 9) Install the new drier. 10) Check for leaks using nitrogen gas (10 bar) and soap bubbles. 11) Connect the flare-connections. 12) Evacuate the system, and charge it with refrigerant.
  • Page 52 EXTRUDING HEAD 9) Remove the sealing bolts, and lift off the extruding head. 10) Check the bearing inside the extruding head. If it is worn out or scratched, replace the bearing. Note: Replacing the bearing needs a fitting tool. If it is not available, replace the whole extruding head.
  • Page 53 17) Remove the four socket head cap screws securing the evaporator with the housing. 18) Lift off the evaporator. HOUSING AND MECHANICAL SEAL 19) The mechanical seal consists of two parts. One part rotates with the auger, the other is static and is fitted into a top recess in the housing.

  • Page 54: Control Water Valve

    8. CONTROL WATER VALVE 1) Disconnect the power source. 2) Close the water supply tap. 3) Remove the panels. 4) Disconnect the terminals from the control water valve. 5) Remove the cover - reservoir Inlet from the control water valve. 6) Loosen the fitting nut on the control water valve Inlets, and remove the control water valve.

  • Page 55: Controller Board

    10) Pour water into the reservoir, and check for water leaks on the flush water valve. 11) Open the water supply tap. 12) Connect the power source. 13) Check for water leaks. 14) Push the stop button, and make sure water is flushing. 15) Push the ice button.

This manual is also suitable for:

Fm-120ke-hcnFm-120ke-50-hcFm-120ke-50-hcnFm-80ke-hcFm-80ke-hcn

Table of Contents