Hoshizaki KM-1800SWH/3 Service Manual
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Hoshizaki KM-1800SWH/3 Service Manual

Hoshizaki KM-1800SWH/3 Service Manual

Stackable crescent cuber
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Stackable Crescent Cuber
Models
KM-1800SAH/3
KM-1800SWH/3
KM-1800SRH/3
SERVICE MANUAL
Number: 73131
Issued: 11-11-2005
Revised: 5-24-2007

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Summary of Contents for Hoshizaki KM-1800SWH/3

  • Page 1 Hoshizaki Hoshizaki America, Inc. Stackable Crescent Cuber Models KM-1800SAH/3 KM-1800SWH/3 KM-1800SRH/3 SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73131 Issued: 11-11-2005 Revised: 5-24-2007...
  • Page 2 HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the unit. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write or send an e-mail message to the HOSHIZAKI Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.

  • Page 3: Table Of Contents

    1. URC-0F ....................... 11 II. General Information ......................13 A. Construction ........................ 13 1. KM-1800SAH/3 ...................... 13 . KM-1800SWH/3 ..................... 14 3. KM-1800SRH/3 ..................... 15 B. Sequence of Operation ....................16 1. One Minute Fill Cycle .................... 16 . Initial Harvest Cycle ....................16 3.
  • Page 4 1. KM-1800SAH/3 ...................... 6 . KM-1800SWH/3 ..................... 7 3. KM-1800SRH/3 ..................... 8 B. Wiring Diagrams ......................9 1. KM-1800SAH ....................9 . KM-1800SAH3 ....................... 30 3. KM-1800SWH, KM-1800SRH ................31 4. KM-1800SWH3, KM-1800SRH3 ................3 C. Performance Data ....................... 33 1.

  • Page 5: Specifications

    I. Specifications A. Icemaker 1. KM-1800SAH (air-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 18 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP.

  • Page 6: Km-1800Sah3 (Air-Cooled, 3 Phase)

    2. KM-1800SAH3 (air-cooled, 3 phase) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 11 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) lbs./day ( kg/day ) *1757 (797)

  • Page 7: Km-1800Swh (Water-Cooled)

    3. KM-1800SWH (water-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 8: Km-1800Swh3 (Water-Cooled, 3 Phase)

    4. KM-1800SWH3 (water-cooled, 3 phase) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 9.7 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) lbs./day ( kg/day ) *1761 (799)

  • Page 9: Km-1800Srh (Remote Air-Cooled)

    SPECIFICATION NO. 05A001 ISSUED: 8/26/2005 5. KM-1800SRH (remote air-cooled) ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER MODEL: KM-1800SRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 16.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY...

  • Page 10: Km-1800Srh3 (Remote Air-Cooled, 3 Phase)

    SPECIFICATION NO. 05A002 6. KM-1800SRH3 (remote air-cooled, 3 phase) ISSUED: 10/3/2005 ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER MODEL: KM-1800SRH3 AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 10.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE...

  • Page 11: Condensing Unit

    B. Condensing Unit Unit: mm (inches) 1. URC-20F...

  • Page 12: Urc-0F

    Specifications Model: URC-0F AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR ( QTY. 2 ) 115 V Total 2.6FLA 130 W EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" ( 1178 x 398 x 659 mm ) (DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16"...

  • Page 13: General Information

    II. General Information A. Construction 1. KM-1800SAH/3 Spray Tubes Evaporator Water Supply Inlet Water Valve Hot Gas Valve Junction Box Check Valves (3) Condenser Condenser Fan Motors () Water Pump Float Switch Cleaning Valve Drier Expansion Valves (3) Line Valve Compressor Bin Control Thermostat...

  • Page 14: Km-1800Swh/3

    2. KM-1800SWH/3 Evaporator Spray Tubes Water Valve Expansion Valves (3) Water Supply Inlet Check Valves (3) Hot Gas Valve Junction Box Control Box Water-cooled Condenser Line Valve Water Regulator Water Pump Capacitor Box (KM-1800SWH) Float Switch Transformer Box Cleaning Valve...

  • Page 15: Km-1800Srh/3

    3. KM-1800SRH/3 Evaporator Spray Tubes Water Valve Expansion Valves (3) Water Supply Inlet Check Valves (3) Hot Gas Valve Junction Box Control Box Receiver Tank Water Pump Line Valve Float Switch Cleaning Valve Drier Capacitor Box Compressor (KM-1800SRH) Control Switch Bin Control Thermostat Transformer Box (KM-1800SRH3)

  • Page 16: Sequence Of Operation

    B. Sequence of Operation The steps in the sequence are as outlined below. When power is supplied, a 5 second delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is 1, 4, 3, . 1.

  • Page 18: Control Board

    C. Control Board • A HOSHIZAKI exclusive solid-state control is employed in KM-1800SAH/3, KM-1800SWH/3 and KM-1800SRH/3 Stackable Crescent Cubers. • All models are pretested and factory-adjusted. CAUTION 1. Fragile, handle very carefully. . A control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 19: Control Board Layout

    1. Control Board Layout Control Products "E" Control Board Output Test Switch (used to test relays on board) Dip Switch Alarm Reset Switch Backup Freeze Timer LED Connector K3 Harvest Control (thermistor) Backup Harvest Connector K4 Timer LED Open (not connected) Alarm Buzzer Microprocessor Power LED...

  • Page 20: Features

    2. Features a) Maximum Water Supply Period – 6 minutes Inlet water valve opening, in the harvest cycle, is limited by the harvest timer. The water valve cannot remain open longer than the maximum period. The water valve can close in less than six minutes if the harvest cycle is completed.

  • Page 21: F) Led Lights And Audible Alarm Safeties

    f) LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs. At startup a 5 second delay occurs while the board conducts an internal timer check. A short beep occurs when the power switch is turned OFF. The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below.

  • Page 22: Controls And Adjustments

    The dip switch is factory-adjusted to the following positions: Dip Switch No. KM-1800SAH/3 OFF OFF ON ON ON ON OFF OFF ON OFF KM-1800SWH/3 OFF OFF ON ON ON ON OFF OFF OFF OFF KM-1800SRH/3 OFF ON ON ON ON ON OFF OFF ON OFF Freeze Timer (9 &...

  • Page 23: C) Harvest Timer (Dip Switch 1 & )

    However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, call the HOSHIZAKI Technical Support Department at 1-800-33-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting will decrease 4 hour production.

  • Page 24: E) Pump-Out Frequency Control (Dip Switch 5 & 6)

    e) Pump-Out Frequency Control (dip switch 5 & 6) The pump motor drains the water tank at the frequency set by the pump-out frequency control. The pump-out frequency control is factory-adjusted to drain the water tank every 10 cycles, and no adjustment is required. However, where water quality is bad and the icemaker needs a pump drain more often, the pump-out frequency can be adjusted as shown in the table below: Dip Switch Setting...

  • Page 25: Control Board Check Procedure

    4. Control Board Check Procedure Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. 1) Check the dip switch settings to assure that #3, 4, 7, 8, 9, & 10 are in the factory default position.

  • Page 26: Technical Information

    III. Technical Information A. Water Circuit and Refrigerant Circuit 1. KM-1800SAH/3...

  • Page 27: Km-1800Swh/3

    2. KM-1800SWH/3...

  • Page 28: Km-1800Srh/3

    3. KM-1800SRH/3...

  • Page 29: Wiring Diagrams

    B. Wiring Diagrams 1. KM-1800SAH * Pressure Switch Cut-out 41±1.3 PSIG Cut-in 37±1.3 PSIG...

  • Page 30: Km-1800Sah3

    2. KM-1800SAH3 * Pressure Switch Cut-out 41±1.3 PSIG Cut-in 37±1.3 PSIG...

  • Page 31: Km-1800Swh, Km-1800Srh

    3. KM-1800SWH, KM-1800SRH * Pressure Switch Water-Cooled Model Remote Model Cut-out 384± PSIG 41± PSIG Cut-in 84±1 PSIG 37±1 PSIG...

  • Page 32: Km-1800Swh3, Km-1800Srh3

    4. KM-1800SWH3, KM-1800SRH3 * Pressure Switch Water-Cooled Model Remote Model Cut-out 384± PSIG 41± PSIG Cut-in 84±1 PSIG 37±1 PSIG...

  • Page 33: Performance Data

    C. Performance Data 1. KM-1800SAH (air-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1756 1685 1589 80/27 1702 1592 1496 90/32 1685 1514 1416 lbs./day kg./day 100/38 1579 1491 1326 APPROXIMATE ELECTRIC 70/21 2780 2838...

  • Page 34: Km-1800Sah3 (Air-Cooled, 3 Phase)

    2. KM-1800SAH3 (air-cooled, 3 phase) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1757 1683 1597 80/27 1701 1587 1507 90/32 1683 1506 1422 lbs./day kg./day 100/38 1579 1486 1344 APPROXIMATE ELECTRIC 70/21 2562 2676...

  • Page 35: Km-1800Swh (Water-Cooled)

    3. KM-1800SWH (water-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1816 1810 1789 80/27 1812 1803 1774 90/32 1810 1797 1770 lbs./day kg./day 100/38 1801 1791 1746 APPROXIMATE ELECTRIC 70/21 2500 2515 2519 CONSUMPTION...

  • Page 36: Km-1800Swh3 (Water-Cooled, 3 Phase)

    4. KM-1800SWH3 (water-cooled, 3 phase) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1761 1766 1726 80/27 1765 1773 1707 90/32 1766 1778 1722 lbs./day kg./day 100/38 1742 1765 1671 APPROXIMATE ELECTRIC 70/21 2420 2470...

  • Page 37: Km-1800Srh (Remote Air-Cooled)

    PERFORMANCE DATA NO. 05A001 ISSUED: 08/26/05 ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER 5. KM-1800SRH (remote air-cooled) MODEL: KM-1800SRH APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1817 1768 1643 80/27 1780 1704 1546...

  • Page 38: Km-1800Srh3 (Remote Air-Cooled, 3 Phase)

    PERFORMANCE DATA NO. 05A002 ISSUED: 10/03/05 ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER 6. KM-1800SRH3 (remote air-cooled, 3 phase) MODEL: KM-1800SRH3 APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1775 1722 1618 80/27 1735...

  • Page 39: Service Diagnosis

    IV. Service Diagnosis A. 10-Minute KM Diagnostic Procedure The 10 minute check out procedure is basically a sequence check which can be used at unit start-up or for system diagnosis. Using this check out procedure will allow you to diagnose electrical system and component failures in approximately 10 minutes under normal operating conditions of 70°F or warmer air and 50°F or warmer water temperatures.

  • Page 40: Diagnostic Charts

    Note: Normal freeze cycle will last 0 to 40 minutes depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual. 6) Pump-Out Cycle (10/20 second pump out) – The compressor remains energized, the hot gas valve energizes, the fan motor de-energizes, the pump motor stops for  seconds and starts in reverse rotation for 10/0 seconds.
  • Page 41 Problem Possible Cause Remedy [1] The icemaker will not e)High Pressure Control 3. Ambient or condenser 3. Reduce temperature. start. (continued) (continued) water temperature too warm. 4. Refrigerant 4. Recharge. overcharged. 5. Fan not operating. 5. See chart 1.[6] (except water-cooled model) 6.
  • Page 42 Problem Possible Cause Remedy [1] The icemaker will not m)Interlock Switch 1. "OFF" position. 1. Move to "ON" position. start. (continued) (Cleaning Valve) . Bad contacts. . Check for continuity and replace. n)Wash Switch 1. "WASH" position. 1. Move to "ICE" position. .
  • Page 43 Problem Possible Cause Remedy [5] No water comes from d)Pump Motor . Bearing worn out. . Replace. spray tubes. Water (continued) 3. Wiring to pump motor. 3. Check for loose pump will not start, or connection or open, and freeze cycle time is replace.

  • Page 44: Evaporator Is Frozen Up

    2. Evaporator is Frozen Up Problem Possible Cause Remedy [1]Freeze cycle time is a) Float Switch 1. Leads short-circuit or 1. Check and replace. too long. defective switch. . Float does not move . Clean or replace. freely. b) Inlet Water Valve 1.

  • Page 45: Low Ice Production

    Problem Possible Cause Remedy [3]Other (continued) g) Water Supply Line 1. Too small; requires 1. Increase water line size. 3/8" OD line dedicated per machine. h) Water Filter 1. Flow rate too small. 1. Replace with filter that has larger flow rate. 3.
  • Page 46 Problem Possible Cause Remedy [] Abnormal noise. c) Compressor . Mounting pad out of . Reinstall. (continued) (continued) position. d) Refrigerant Lines 1. Rub or touch other 1. Replace. lines or surfaces. [3] Ice in storage bin a) Drain Line(s) 1.

  • Page 47: Removal And Replacement Of Components

    V. Removal and Replacement of Components IMPORTANT 1. Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced. . 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 48: Evacuation And Recharge (R-404A)

    For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No. 700-88 be used.

  • Page 49: Removal And Replacement Of Compressor

    C. 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 50: Removal And Replacement Of Expansion Valve

    D. Removal and Replacement of Expansion Valve IMPORTANT Sometimes moisture in the refrigeration 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 51: Removal And Replacement Of Hot Gas Valve And Line Valve

    F. Removal and Replacement of Hot Gas Valve and Line Valve IMPORTANT 1. Always use a copper tube of the same diameter and length when replacing the hot gas lines; otherwise the performance may be reduced. . Always install a new drier every time the sealed refrigeration system is opened.

  • Page 52: Removal And Replacement Of Evaporator

    G. 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. ) Remove the panels and the top insulation over the evaporator.

  • Page 53: Removal And Replacement Of Fan Motor

    5) Remove the plastic cable ties, foam Thermistor Lead Cable Tie insulation, thermistor holder and thermistor. See Fig. 1. 6) Scrape away the old sealant on the thermistor holder and the suction pipe. 7) Wipe off moisture or condensation on the suction pipe.

  • Page 54: Removal And Replacement Of Pump Motor

    4) Remove the valve outlet tubing by releasing the clamp. 5) Loosen the fitting nut. Be careful not to lose the washer. 6) Disconnect the terminals from the water valve. 7) Remove the bracket and valve from the unit. 8) Remove the valve from the bracket. Attach new valve to the bracket, then install the valve.

  • Page 55: Removal And Replacement Of Water Regulating Valve - Water-Cooled Model Only

    6) Install the new spray tubes, and replace the removed parts in the reverse order of which they were removed. 7) Replace the panels in their correct positions. 8) Turn on the power supply. M. 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.

  • Page 56: Adjustment Of Water Regulating Valve - Water-Cooled Model Only

    N. 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 procedure. 1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system.

  • Page 57: Removal And Replacement Of Headmaster (Condenser Pressure Regulator - C

    O. Removal and Replacement of Headmaster (Condenser 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.

  • Page 58: Cleaning And Maintenance Instructions

    Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment. WARNING 1. HOSHIZAKI recommends cleaning this unit at least once a year. More frequent cleaning, however, may be required in some existing water conditions.

  • Page 59: Cleaning Procedure

    1. Cleaning Procedure 1) Dilute 38 fl. oz. (1.15 l) of the recommended cleaner Hoshizaki "Scale Away" or "LIME- A-WAY" (Economics Laboratory, Inc.) with 7 gal. (6 l) of water. ) Remove all ice from the evaporator and the storage bin.

  • Page 60: Sanitizing Procedure - Following Cleaning Procedure

    0) Turn off the power supply after 3 minutes. 1) Remove the front panel and fully open the cleaning valve. ) Move the control switch to the "WASH" position. 3) Replace the front panel in its correct position. 4) Turn on the power supply to rinse off the cleaning solution. 5) Turn off the power supply after 5 minutes.

  • Page 61: Maintenance

    B. Maintenance IMPORTANT This icemaker must be maintained individually, referring to the instruction manual and labels provided with the unit. 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.
  • Page 62 ) Move the control switch on the control box to the "OFF" position. 3) Wait 3 minutes. 4) Move the control switch to the "ICE" position. 5) Allow 5 minutes for the icemaker to fill with water and the water pump to start operating. 6) Close the water-cooled condenser water supply line shut-off valve.

This manual is also suitable for:

Km-1800sah/3Km-1800srh/3

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