Hoshizaki KM-1300SWH-E Service Manual
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Hoshizaki KM-1300SWH-E Service Manual

Hoshizaki KM-1300SWH-E Service Manual

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STACKABLE CRESCENT CUBER
SERVICE MANUAL
FOR QUALIFIED SERVICE PERSON
NUMBER:
89/336
ISSUED:
73/23
KM-1300SWH-E
HOSHIZAKI
73141
JULY 13, 2006

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Summary of Contents for Hoshizaki KM-1300SWH-E

  • Page 1 NUMBER: 73141 89/336 ISSUED: JULY 13, 2006 73/23 STACKABLE CRESCENT CUBER KM-1300SWH-E SERVICE MANUAL FOR QUALIFIED SERVICE PERSON HOSHIZAKI...
  • 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 service or maintenance. CONTENTS I. SPECIFICATIONS ......................5 1. KM-1300SWH-E (water-cooled) ................... 5 II. GENERAL INFORMATION ....................6 1. CONSTRUCTION ......................6 [a] KM-1300SWH-E ....................6 2.
  • Page 4 VI. CLEANING AND MAINTENANCE INSTRUCTIONS ........... 44 1. PREPARING THE ICEMAKER FOR LONG STORAGE..........44 2. CLEANING AND SANITIZING PROCEDURES ............46 [a] CLEANING PROCEDURE ................. 46 [b] SANITIZING PROCEDURE - Following Cleaning Procedure ......48 3. MAINTENANCE ......................49...

  • Page 5: Specifications

    I. SPECIFICATIONS 1. KM-1300SWH-E (water-cooled) Note: We reserve the right to make changes in specifications and design without prior notice.

  • Page 6: General Information

    II. GENERAL INFORMATION 1. CONSTRUCTION [a] KM-1300SWH-E...

  • Page 7: Controller Board

    2. CONTROLLER BOARD [a] SOLID-STATE CONTROL 1) A HOSHIZAKI exclusive solid-state control is employed in KM “H” Series -E 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 8 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 9°C 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 9 timer check. A short beep occurs when the power switch is turned ON or OFF. The green LED’s 1-4 represent the corresponding relays and energize and sequence 5 seconds from initial startup as follows: Sequence Step LED’s on Length: Min. Max.
  • Page 10 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 ener- gized with the control switch OFF or the unit will not start. The dip switches should be adjusted per the adjustment chart published in the Tech Specs book.

  • Page 11: [C] Sequence

    [c] SEQUENCE KM-1300S_H-E 1st Cycle 1. Unit energized and Control Switch to “ICE” 3. Thermistor reads 9°C. 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. 4.
  • Page 12 KM-1300S_H-E 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 13 KM-1300S_H-E 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 9°C. 1. Float Switch opens and signals to complete Defrost Timer starts counting. freeze cycle.

  • Page 14: [D] Controls And Adjustments

    [d] CONTROLS AND ADJUSTMENTS The Dip Switch is factory-adjusted to the following positions: DIP SWITCH NO. KM-1300SWH-E OFF OFF OFF OFF OFF OFF 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.
  • Page 15 1) Defrost Control A thermistor (Semiconductor) is used for a defrost control sensor. The resistance var- ies depending on the Suction Line temperatures. The Thermistor detects the tempera- ture 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 16 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 CAUTION...

  • Page 17: [E] Checking The Controller Board

    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 18 After the 1 minute ± 5 second water supply cycle and the 2 minute ± 10 second defrost cycle, the unit should start the freeze cycle. (ii) After the above step (i), disconnect the Float Switch leads from the Controller Board within the first 5 minutes of the freeze cycle.

  • Page 19: Technical Information

    III. TECHNICAL INFORMATION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT [a] KM-1300SWH-E...

  • Page 20: Wiring Diagrams

    2. WIRING DIAGRAMS [a] KM-1300SWH-E KM-1300SWH-E Pressure Switch +21.3 Cut-out PSIG Cut-in 284 ± 21.3 PSIG...

  • Page 21: Timing Chart

    3. TIMING CHART The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] CONTROLS AND ADJUSTMENTS.”...
  • Page 22 The Pump Motor waits for 2 seconds before starting a drain cycle. See “II. 2. [d] CONTROLS AND ADJUSTMENTS.” The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] CONTROLS AND ADJUSTMENTS.”...

  • Page 23: Performance Data

    4. PERFORMANCE DATA [a] KM-1300SWH-E Note: Pressure data is recorded at 5 minutes into freeze cycle. The data not in bold should be used for reference only. We reserve the right to make changes in specifications and design without prior notice.

  • Page 24: Service Diagnosis

    IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] The icemaker a) Power Supply 1. “OFF” position. 1. Move to “ON” position will not start 2. Loose connections. 2. Tighten 3. Bad contacts. 3. Check for continuity and replace.
  • Page 25 PROBLEM POSSIBLE CAUSE REMEDY [2] Water a) Float switch 1. Connector disconnected. 1. Place in position. continues to 2. Leads opened or defective 2. Check and replace. be supplied, switch. and the ice- 3. Float does not move freely. 3. Clean or replace. maker will not b) Controller Board 1.
  • Page 26 PROBLEM POSSIBLE CAUSE REMEDY [4] Water a) Water Solenoid 1. Diaphragm does not close. 1. Check for water leaks continues to Valve with icemaker off. be supplied in b) Controller Board 1. Defective. 1. See “II.2.[e] CHECKING freeze cycle. CONTROLLER BOARD.” [5] No water a) Water Supply Line 1.

  • Page 27: Evaporator Is Frozen Up

    2. EVAPORATOR IS FROZEN UP PROBLEM POSSIBLE CAUSE REMEDY [1] Freeze cycle a) Float Switch 1. Leads short-circuit or 1. Check and replace. time is too defective switch. long. 2. Float does not move freely. 2. Clean or replace. b) Water Solenoid 1.

  • Page 28: Low Ice Production

    3. LOW ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] Freeze cycle a) See chart 1 - [3], and check dirty Air Filter or Condenser, ambient or water time is long. temperature, water pressure, Water Regulator or refrigerant charge. b) See chart 2 - [1], and check Float Switch, Water Solenoid Valve or Controller Board.

  • Page 29: Removal And Replacement Of Components

    V. REMOVAL AND REPLACEMENT OF COMPONENTS IMPORTANT Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced. 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.

  • Page 30: 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 31: 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 repairs or replacements have 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 32: Removal And Replacement Of Drier

    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 33: Removal And Replacement Of Expansion Valve

    5. REMOVAL AND REPLACEMENT OF EXPANSION VALVE IMPORTANT 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 replacements have been made.

  • Page 34: Removal And Replacement Of Hot Gas Valve And/Or Line Valve

    6. REMOVAL AND REPLACEMENT OF HOT GAS VALVE AND/OR LINE VALVE IMPORTANT Always use a copper tube of the same diameter and length when replacing the hot gas lines; otherwise the performance may be reduced. IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened.

  • Page 35: Removal And Replacement Of Evaporator

    13) Replace the panels in their correct positions. 14) If the unit is equipped with a plug, plug it in. Turn on the power supply. 7. REMOVAL AND REPLACEMENT OF EVAPORATOR IMPORTANT Always install a new Drier every time the sealed refrigeration system is opened.

  • Page 36: Removal And Replacement Of Water Regulating Valve

    8. REMOVAL AND REPLACEMENT OF WATER REGULATING VALVE 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 replace- ments have been made. 1) Turn off the power supply. If the unit is equipped with a plug, unplug it. 2) Close the Water Supply Line Shut-off Valve.

  • Page 37: Adjustment Of Water Regulating Valve

    9. ADJUSTMENT OF WATER REGULATING VALVE 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. Or prepare a thermom- eter to check for the condenser drain temperature.

  • Page 38: Removal And Replacement Of Thermistor

    10. 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 or equivalent. 3. Always use a recommended foam insulation (Non-absorbent Type) or equivalent.
  • Page 39 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 40: Removal And Replacement Of Water Valve

    11. REMOVAL AND REPLACEMENT OF WATER VALVE 1) Turn off the power supply. If the unit is equipped with a plug, unplug it. 2) Close the Water Supply Line Shut-off Valve. 3) Remove the Top Panel and Front Panel. 4) Remove the Valve Outlet Tubing by releasing the Clamp. 5) Remove the Bracket from the unit.

  • Page 41: Removal And Replacement Of Pump Motor

    12. REMOVAL AND REPLACEMENT OF PUMP MOTOR Note: When replacing a Pump Motor with defective winding, it is recommended that a new capacitor be installed. 1) Turn off the power supply. If the unit is equipped with a plug, unplug it. 2) Remove the Front Panel.

  • Page 42: Removal And Replacement Of Float Switch

    13. REMOVAL AND REPLACEMENT OF FLOAT SWITCH 1) Go through the steps 1) through 6) in “14. REMOVAL AND REPLACEMENT OF PUMP MOTOR.” 2) Remove the connectors of the Float Switch. 3) Remove the screw and the Float Switch Bracket. 4) Remove the two screws and the Float Switch.

  • Page 43: Removal And Replacement Of Spray Tubes

    14. REMOVAL AND REPLACEMENT OF SPRAY TUBES 1) Turn off the power supply. If the unit is equipped with a plug, unplug it. 2) Remove the Front Panel and the Insulation Panel. 3) Remove the Rubber Hose from the Spray Tubes (Water Supply Pipe). 4) Release the Clamp, and disconnect the Rubber Hose.

  • Page 44: Cleaning And Maintenance Instructions

    VI. CLEANING AND MAINTENANCE INSTRUCTIONS IMPORTANT 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 WARNING When shutting off the icemaker for an extended time, drain out all water from the water tank and remove the ice from the Storage Bin.
  • Page 45 [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 46: Cleaning And Sanitizing Procedures

    [a] CLEANING PROCEDURE 1) Dilute 27 fl. oz. of the recommended cleaner Hoshizaki “Scale Away” or “LIME-A-WAY” (Economics Laboratory, Inc.) with 5 gal. of water. 2) Remove all ice from the Evaporator and the Storage Bin.
  • Page 47 9) Replace the Insulation Panel and the Front Panel in their correct positions. 10) Turn on the power supply, and start the washing process. 11) Turn off the power supply after 30 minutes. 12) Remove the Front Panel and the Insulation Panel. 13) Drain the Water Tank.

  • Page 48: [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 2.5 fl. oz. of sanitizer to 5 gal. of water). 2) Remove the Insulation Panel, if it is in its normal position. 3) Pour the sanitizing solution into the Water Tank.

  • Page 49: 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 and soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. 2) Storage Bin and Scoop •...

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