Hoshizaki KMD-900MRH Service Manual
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Hoshizaki KMD-900MRH Service Manual

Hoshizaki KMD-900MRH Service Manual

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Reliability is a
beautiful thing
TM
SERVICE MANUAL
MODULAR CRESCENT CUBER
KMD-700MAH
KMD-700MWH
KMD-700MRH
KMD-900MAH
KMD-900MWH
KMD-900MRH
ITEM #: 73107
ISSUED: June 2, 2003
™
REVISED: July 28, 2006

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Summary of Contents for Hoshizaki KMD-900MRH

  • Page 1 Reliability is a beautiful thing MODULAR CRESCENT CUBER KMD-700MAH KMD-700MWH KMD-700MRH KMD-900MAH KMD-900MWH KMD-900MRH SERVICE MANUAL ITEM #: 73107 ISSUED: June 2, 2003 ™ REVISED: July 28, 2006...
  • 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

    [c1] KMD-900MAH and KMD-900MWH (auxiliary code R-0 and earlier) ....40 [c2] KMD-900MAH and KMD-900MWH (auxiliary code R-1 and later) ....41 [d1] KMD-900MRH (auxiliary code R-0 and earlier) ..........42 [d2] KMD-900MRH (auxiliary code R-1 and later) ............ 43...
  • Page 4 [b] KMD-700MWH ....................47 [c] KMD-700MRH ..................... 48 [d] KMD-900MAH ..................... 49 [e] KMD-900MWH ....................50 [f] KMD-900MRH ...................... 51 IV. Service Diagnosis ......................52 1. No Ice Production ....................... 52 2. Evaporator is Frozen Up ..................... 55 3. Low Ice Production ..................... 56 4.

  • Page 5: Specifications

    I. Specifications 1. KMD-700MAH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 14.3 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP.

  • Page 6: Kmd-700Mwh

    2. KMD-700MWH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 12.9 MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 7: Kmd-700Mrh

    3. KMD-700MRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 13.15 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 8: Kmd-900Mah

    4. KMD-900MAH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 15 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15.5 A MAXIMUM FUSE SIZE 25 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 9: Kmd-900Mwh

    5. KMD-900MWH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 14 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 14.7 MAXIMUM FUSE SIZE 25 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 10: Kmd-900Mrh

    6. KMD-900MRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 14 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 14.65 A MAXIMUM FUSE SIZE 25 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 11: Condensing Unit

    7. Condensing Unit URC-12F...
  • Page 12 Specifications MODEL: URC-12F EXTERIOR Galvanized Steel DIMENSIONS (W x D x H) 35 - 11/16” x 15-11/16” x 21-15/16” (907.2 x 398 x 557.8 mm) REFRIGERANT CHARGE URC-12F R404A 4 lbs. 7 oz. (2000 g) WEIGHT Net 80 lbs. (36 kg) Shipping 87 lbs.

  • Page 13: General Information

    II. General Information 1. Construction [a] KMD-700MAH EXPANSION VALVE WATER SUPPLY INLET SPRAY TUBE HOT GAS VALVE JUNCTION BOX CONDENSER FLOAT SWITCH CONDENSER FAN MOTOR CONTROL BOX WATER PUMP DRIER COMPRESSOR BIN CONTROL...

  • Page 14: [B] Kmd-700Mwh

    [b] KMD-700MWH EXPANSION VALVE WATER SUPPLY INLET SPRAY TUBE HOT GAS VALVE JUNCTION BOX CONDENSER FLOAT SWITCH WATER REGULATOR CONTROL BOX WATER PUMP DRIER COMPRESSOR BIN CONTROL...

  • Page 15: [C] Kmd-700Mrh

    [c] KMD-700MRH EXPANSION VALVE WATER SUPPLY INLET HOT GAS VALVE SPRAY TUBE JUNCTION BOX FLOAT SWITCH RECEIVER TANK CONTROL BOX DRIER WATER PUMP COMPRESSOR LINE VALVE BIN CONTROL...

  • Page 16: [D] Kmd-900Mah

    [d] KMD-900MAH WATER SUPPLY INLET SPRAY TUBE EXPANSION VALVE HOT GAS VALVE JUNCTION BOX CONDENSER CONDENSER FLOAT SWITCH FAN MOTOR WATER PUMP CONTROL BOX DRIER COMPRESSOR BIN CONTROL...

  • Page 17: [E] Kmd-900Mwh

    [e] KMD-900MWH EXPANSION VALVE WATER SUPPLY SPRAY TUBE INLET HOT GAS VALVE JUNCTION BOX CONDENSER FLOAT SWITCH WATER REGULATOR CONTROL BOX DRIER WATER PUMP COMPRESSOR BIN CONTROL...

  • Page 18: [F] Kmd-900Mrh

    [f] KMD-900MRH EXPANSION VALVE WATER SUPPLY INLET HOT GAS VALVE SPRAY TUBE JUNCTION BOX FLOAT SWITCH RECEIVER TANK CONTROL BOX WATER PUMP DRIER COMPRESSOR LINE VALVE BIN CONTROL...

  • Page 19: Controller Board

    2. Controller Board [a] Solid-State Control 1) A HOSHIZAKI exclusive solid-state control is employed in KMD Modular Crescent Cubers. 2) A printed circuit board (hereafter called “controller board”) includes a stable and high quality control system. 3) All models are pretested and factory-adjusted.
  • Page 20 2) Defrost Timer The defrost cycle starts when the float switch opens and completes the freeze cycle. But the defrost timer does not start counting until the thermistor senses 48°F at the evaporator outlet. The period from the end of the freeze cycle up to the point of the thermistor's sensing varies depending on the ambient and water temperatures.
  • Page 21 The green LEDs 1-4 represent the corresponding relays and energize and sequence 5 seconds from initial startup as follows: Time LEDs are Lit Sequence Step Min. Max. Avg. 60 seconds 1 Minute Fill Cycle Harvest Cycle 1, 4, and 2 2 minutes 20 minutes 3 to 5 minutes 5 minutes 60 minutes 30 to 35 minutes...
  • Page 22 The application switch located between relay X3 & X4 must be set to match the original board application. Place this switch in the ALP position if there is no white wire supplied to the K1 connector. If there is a white wire, place the switch in the C position. If this switch is placed in the wrong position, either the compressor contactor will remain energized with the control switch OFF, or the unit will not start.

  • Page 23: [C] Sequence

    [c] Sequence 1st Cycle 1. Unit energized and control switch to “ICE” 3. Thermistor reads 48°F. position. Water supply cycle starts. Defrost timer starts counting. 2. After 1 minute, defrost cycle starts. IMPORTANT Water valve opening is limited to 6 minutes. &...
  • Page 24 2nd Cycle and after with pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if float switch does not open. 2. Drain timer stops counting. 1. Float switch opens and signals to complete Pump drain is completed freeze cycle.
  • Page 25 2nd Cycle and after with no pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if float switch does not open. 2. Thermistor reads 48°F. 1. Float switch opens and signals to complete Defrost timer starts counting. freeze cycle.

  • Page 26: [D] Controls And Adjustments

    [d] Controls and Adjustments The Dip Switch is factory-adjusted to the following positions: Switch Nos. 1 and 2: Used for adjustment of the defrost timer. The defrost timer starts counting when the thermistor reads a certain temperature at the evaporator outlet. Switch Nos.
  • Page 27 1) Defrost Control A thermistor (semiconductor) is used for a defrost control sensor. The resistance varies depending on the suction line temperatures. The thermistor detects the temperature of the evaporator outlet to start the defrost timer. No adjustment is required. If necessary, check for resistance between thermistor leads, and visually check the thermistor mounting, located on the suction line next to the evaporator outlet.
  • Page 28 3) Drain Timer The drain timer is factory-adjusted, and no adjustment is required. SETTING TIME Dip Switch Dip Switch No. 3 No. 4 10 seconds 150 seconds 10 seconds 180 seconds 10 seconds 120 seconds 20 seconds 180 seconds T1: Time to drain the water tank T2: Time to restrain defrost completion 4) Drain Counter The drain counter is factory-adjusted to drain the water tank every 10 cycles, and no...
  • Page 29 5) Freeze Timer CAUTION Adjust to proper specification, or the unit may not operate correctly. Two new dip switches numbered 9 and 10 have been added to the improved “E” board to better prevent possible freeze ups. These settings come factory set to the default setting of 60 min.

  • Page 30: [E] Checking The Controller Board

    [e] Checking the Controller Board 1) Visually check the sequence with the icemaker operating. 2) Visually check the controller board by using the following procedures. (i) Adjust the defrost timer to minimum position. Disconnect the thermistor from the controller board. Connect a 1.5 kΩ...

  • Page 31: Mechanical Bin Control

    3. Mechanical Bin Control [a] Proximity Switch 1) This machine uses a lever-actuated proximity switch (hereafter called “mechanical bin control”) to control the ice level in the storage bin. [b] Explanation of Operation 1) The startup and shutdown of the ice machine is controlled via the controller board. Dip switch number 7 must be in the ON position for the controller board to receive input from the bin control.

  • Page 32: [C] Troubleshooting

    [c] Troubleshooting 1) Machine will not start (i) Move dip switch no. 7 to the “OFF” position. If the machine starts up within a few seconds, the bin control is the likely problem. If the machine does not start up, refer to section “IV.

  • Page 33: Technical Information

    III. Technical Information 1. Water Circuit and Refrigerant Circuit [a] KMD-700MAH and KMD-900MAH * Note: KMD-900M_H models have two expansion valves.

  • Page 34: [B] Kmd-700Mwh And Kmd-900Mwh

    [b] KMD-700MWH and KMD-900MWH * Note: KMD-900M_H models have two expansion valves.

  • Page 35: [C] Kmd-700Mrh And Kmd-900Mrh

    [c] KMD-700MRH and KMD-900MRH * Note: KMD-900M_H models have two expansion valves.

  • Page 36: Wiring Diagrams

    2. Wiring Diagrams [a1] KMD-700MAH and KMD-700MWH (auxiliary code R-0 and earlier) Note: Pressure Switch Cut-out 412 ± PSIG Cut-out 384 ± PSIG Cut-in 327 ± 21 PSIG Cut-in 284 ± 21 PSIG...

  • Page 37: [A2] Kmd-700Mah And Kmd-700Mwh (Auxiliary Code R-1 And Later)

    [a2] KMD-700MAH and KMD-700MWH (auxiliary code R-1 and later) Note: Pressure Switch Cut-out 412 ± PSIG Cut-out 384 ± PSIG Cut-in 327 ± 21 PSIG Cut-in 284 ± 21 PSIG...

  • Page 38: [B1] Kmd-700Mrh (Auxiliary Code R-0 And Earlier)

    [b1] KMD-700MRH (auxiliary code R-0 and earlier) Note: Pressure Switch Cut-out 412 ± PSIG Cut-in 327 ± 21 PSIG...

  • Page 39: [B2] Kmd-700Mrh (Auxiliary Code R-1 And Later)

    [b2] KMD-700MRH (auxiliary code R-1 and later) Note: Pressure Switch Cut-out 412 ± PSIG Cut-in 327 ± 21 PSIG...

  • Page 40: [C1] Kmd-900Mah And Kmd-900Mwh (Auxiliary Code R-0 And Earlier)

    [c1] KMD-900MAH and KMD-900MWH (auxiliary code R-0 and earlier) Note: Pressure Switch Cut-out 412 ± PSIG Cut-out 384 ± PSIG Cut-in 327 ± 21 PSIG Cut-in 284 ± 21 PSIG...

  • Page 41: [C2] Kmd-900Mah And Kmd-900Mwh (Auxiliary Code R-1 And Later)

    [c2] KMD-900MAH and KMD-900MWH (auxiliary code R-1 and later) Note: Pressure Switch Cut-out 412 ± PSIG Cut-out 384 ± PSIG Cut-in 327 ± 21 PSIG Cut-in 284 ± 21 PSIG...

  • Page 42: [D1] Kmd-900Mrh (Auxiliary Code R-0 And Earlier)

    [d1] KMD-900MRH (auxiliary code R-0 and earlier) Note: Pressure Switch Cut-out 412 ± PSIG Cut-in 327 ± 21 PSIG...

  • Page 43: [D2] Kmd-900Mrh (Auxiliary Code R-1 And Later)

    [d2] KMD-900MRH (auxiliary code R-1 and later) Note: Pressure Switch Cut-out 412 ± PSIG Cut-in 327 ± 21 PSIG...

  • Page 44: Timing Chart

    3. Timing Chart Note: *1 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] Controls and Adjustments.” *2 The bin control will only shut off the ice machine during the first 5 minutes of the freeze cycle...
  • Page 45 Note: *1 The pump motor waits for 2 seconds before starting a drain cycle. See “II. 2. [d] Controls and Adjustments.” *2 The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] Controls and Adjustments.” *3 The bin control will only shut off the ice machine during the first 5 minutes of the freeze cycle...

  • Page 46: Performance Data

    4. Performance Data [a] KMD-700MAH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 1540 1555 1606 CONSUMPTION 80/27 1551 1574 1643 90/32 1555 1653 1590 watts 100/38...

  • Page 47: [B] Kmd-700Mwh

    [b] KMD-700MWH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 1500 1506 1543 CONSUMPTION 80/27 1504 1514 1566 90/32 1506 1567 1520 watts 100/38 1523 1531 1610...

  • Page 48: [C] Kmd-700Mrh

    [c] KMD-700MRH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 1762 1777 1750 CONSUMPTION 80/27 1759 1777 1792 90/32 1762 1790 1806 watts 100/38 1765 1794 1820...

  • Page 49: [D] Kmd-900Mah

    [d] KMD-900MAH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 1930 1951 2039 CONSUMPTION 80/27 1946 1978 2099 90/32 1951 2109 2000 watts 100/38 1988 2026 2210...

  • Page 50: [E] Kmd-900Mwh

    [e] KMD-900MWH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 1950 1977 1950 CONSUMPTION 80/27 1950 1950 1992 90/32 1950 1986 1950 watts 100/38 1965 1959 2020...

  • Page 51: [F] Kmd-900Mrh

    [f] KMD-900MRH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 80/27 90/32 lbs./day kg./day 100/38 APPROXIMATE ELECTRIC 70/21 2075 2117 2162 CONSUMPTION 80/27 2107 2173 2211 90/32 2117 2262 2220 watts 100/38...

  • Page 52: Service Diagnosis

    IV. Service Diagnosis 1. No Ice Production Problem Possible Cause Remedy The icemaker will not a) Power Supply 1. OFF position. 1. Move to ON position. start. 2. Loose connection. 2. Tighten. 3. Bad contacts. 3. Check for continuity and replace.
  • Page 53 Problem Possible Cause Remedy [1] Continued from l) Controller Board 1. Defective. 1. See "II.2[e] Checking the previous page. Controller Board." Interlock Switch 1. OFF Position 1. Move to ON position. (Cleaning Valve) 2. Bad contacts. 2. Check for continuity and replace.
  • Page 54 Problem Possible Cause Remedy [3] Continued from h) Controller Board 1. Defective. 1. See "II.2[e] Checking the previous page. Controller Board." i) Water Regulator [Water- 1. Set too high. 1. Adjust lower. cooled model only] j) Discharge Temp. 1. Refrigerant undercharged. 1. Recharge. Switch 2.

  • Page 55: Evaporator Is Frozen Up

    Problem Possible Cause Remedy [7] Continued from e) Water Supply Line 1. Condenser water pressure 1. Check and get previous page. [Water-cooled model too low or off and pressure recommended pressure. only] control opens and closes frequently. 2. Evaporator is Frozen Up Problem Possible Cause Remedy...

  • Page 56: Low Ice Production

    3. Low Ice Production Problem Possible Cause Remedy Freeze cycle time is See chart 1.[3] and check high pressure control and water regulator. long. See chart 2.[1] and check float switch, water solenoid valve and controller board. [2] Harvest cycle time is See chart 2.[2] and check evaporator, water supply line, water solenoid valve, long.

  • Page 57: Removal And Replacement Of Components

    V. Removal and Replacement of Components IMPORTANT 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 system when replacing or servicing parts. 2. Always install a new filter drier every time the sealed refrigeration system is opened.

  • Page 58: 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 59: Removal And Replacement Of Compressor

    3. Removal and Replacement of 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. Note: When replacing a compressor with a defective winding, be sure to install the new start capacitor and start relay supplied with the replacement compressor.
  • Page 60 15) Evacuate the system, and charge it with refrigerant. 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. 16) Connect the terminals, and replace the terminal cover in its correct position. 17) Replace the panels in their correct positions.

  • Page 61: Removal And Replacement Of Drier

    4. Removal and Replacement of Drier 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) Turn off the power supply. 2) Remove the panels.

  • Page 62: Removal And Replacement Of Hot Gas Valve And Line Valve

    3) Recover the refrigerant and store it in an approved container. 4) Remove the insulation and the expansion valve bulb on the suction line. 5) Remove the expansion valve cover, and disconnect the expansion valve using brazing equipment. 6) Braze the new expansion valve, with nitrogen gas flowing at a pressure of 3-4 PSIG.
  • Page 63 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) Turn off the power supply. 2) Remove the panels. 3) Recover the refrigerant and store it in an approved container. 4) Remove the screw and the solenoid.

  • Page 64: Removal And Replacement Of Evaporator

    7. Removal and Replacement of Evaporator IMPORTANT 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 65: Removal And Replacement Of Water Regulating Valve (Water-Cooled Model Only)

    8. Removal and Replacement of Water Regulating Valve (Water-Cooled Model Only) 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) Turn off the power supply.

  • Page 66: Adjustment Of Water Regulating Valve (Water-Cooled Model Only)

    9. Adjustment of Water Regulating Valve (Water-Cooled Model Only) The water regulating valve (also called “water regulator”) is factory-adjusted. No adjust- ment 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. Or prepare a thermometer to check for the condenser drain temperature.

  • Page 67: Removal And Replacement Of Condensing Pressure Regulator (C.p.r.) (Remote Air-Cooled Model Only)

    10. Removal and Replacement of Condensing Pressure Regulator (C.P.R.) (Remote Air-Cooled Model Only) 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) Turn off the power supply.

  • Page 68: Removal And Replacement Of Thermistor

    11. Removal and Replacement of Thermistor CAUTION 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 69: Removal And Replacement Of Fan Motor

    Min. 4-3/4" Liquid Bypass Flow Fig. 3 10) Secure the insulation using the plastic cable ties. 11) Connect the thermistor leads through the bushing of the control box to the K3 connector on the controller board. Note: Do not cut the leads of the thermistor while installing it. 12) Replace the control box cover and the panels in their correct positions.

  • Page 70: Removal And Replacement Of Water Valve

    13. Removal and Replacement of Water Valve 1) Turn off the power supply. 2) Close the water supply line shut-off valve. 3) Remove the front panel. 4) Remove the valve outlet tubing by releasing the clamp. 5) Remove the bracket from the unit. 6) Remove the fitting nut and water valve.

  • Page 71: Removal And Replacement Of Spray Tubes

    8) Remove the closed end connectors from the pump motor leads. 9) Remove the two screws and the pump motor bracket. 10) Remove the pump 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 72: Removal And Replacement Of Bin Control

    16. Removal and Replacement of Bin Control 1) Turn off the power supply. 2) Remove the front panel and top panel. 3) Remove the two thumbscrews securing the switch cover. 4) Lift the bin control assembly out of the icemaker. 5) Lift off the insulation, then remove the two thumbscrews attaching the bin control to the switch cover.

  • Page 73: Cleaning And Maintenance Instructions

    VI. Cleaning and Maintenance Instructions 1. Preparing the Icemaker for Long Storage IMPORTANT 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. The storage bin should be cleaned and dried.
  • Page 74 [2] Remove the water from the potable water supply line: 1) Remove the front panel. (Except water-cooled models) 2) Move the control switch on the control box to the “OFF” position. 3) Wait 3 minutes. 4) Close the potable water supply line shut-off valve and open the potable water supply line drain valve.
  • Page 75 Top View Water Shield Overflow Cap Overflow Pipe Drain Plug Cube Guide (A) Cube Guide (B) Fig. 5...

  • Page 76: Cleaning Instructions

    [a] Cleaning Procedure 1) Dilute approximately 13.5 fl. oz. of recommended cleaner Hoshizaki “Scale Away” or “LIME-A-WAY,” (Economics Laboratory, Inc.) with 2.5 gallons of water. 2) Remove all ice from the evaporator and the storage bin.
  • Page 77 Note: To remove cubes on the evaporator, turn off the power supply and turn it back on after 3 minutes. The defrost cycle starts and the cubes will be removed from the evaporator. 3) Turn off the power supply. 4) Remove the front panel. Then remove the insulation panel by removing thumbscrew, lifting up the panel slightly and pulling it toward you.
  • Page 78 19) Turn on the power supply to fill the water tank with water. 20) Turn off the power supply after 3 minutes. 21) Remove the front panel, and fully open the cleaning valve. 22) Move the control switch to the “WASH” position. 23) Replace the front panel in its correct position.

  • Page 79: [B] Sanitizing Procedure - Following Cleaning Procedure

    [b] Sanitizing Procedure - Following Cleaning Procedure 1) Dilute a 5.25% sodium hypochlorite solution (chlorine bleach) with water (Add approxi- mately 1.25 fl. oz. to 2.5 gal. of water). 2) Remove the insulation panel by removing thumbscrew, lifting up the panel slightly and pulling it toward you.

  • Page 80: Maintenance

    3. Maintenance IMPORTANT This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker. 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. 2) Storage Bin and Scoop •...

This manual is also suitable for:

Kmd-900mwhKmd-900mahKmd-700mrhKmd-700mwhKmd-700mah

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