Hoshizaki KMS-1400MLH Service Manual
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Hoshizaki KMS-1400MLH Service Manual

Hoshizaki KMS-1400MLH Service Manual

Modular crescent cuber serenity series
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Modular Crescent Cuber
Serenity Series
Model
KMS-1400MLH
Including
Condensing Unit Model SRK-14H/3
SERVICE MANUAL
™
Number: 73162
Issued: 2-28-2008

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Summary of Contents for Hoshizaki HOSHIZAKI KMS-1400MLH

  • Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Modular Crescent Cuber Serenity Series Model KMS-1400MLH Including Condensing Unit Model SRK-14H/3 SERVICE MANUAL ™ Number: 73162 Issued: 2-28-2008...
  • Page 2 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, write, or send an e-mail message to the HOSHIZAKI Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.

  • Page 3: Table Of Contents

    This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety.
  • Page 4 E. Float Switch ... 3 1. Explanation of Operation ... 3 . Cleaning ... 3 3. Float Switch Check Procedure ... 3 F. Bin Control ... 5 1. Explanation of Operation ... 5 . Bin Control Check Procedure ... 5 G.
  • Page 5 VI. Cleaning and Maintenance ... 5 A. Cleaning and Sanitizing Instructions ... 5 1. Cleaning Procedure ... 5 . Sanitizing Procedure - Following Cleaning Procedure ... 54 B. Maintenance ... 54 C. Preparing the Icemaker for Long Storage ... 55...

  • Page 6: Specifications

    I. Specifications SPECIFICATION DATA NO. 08A001 A. Icemaker ITEM: HOSHIZAKI MODULAR CRESCENT CUBER WITH REMOTE COMPRESSOR/CONDENSER UNIT MODEL: KMS-1400MLH with SRK-14H 1. KMS-1400MLH – SRK-14H AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR.

  • Page 7: Kms-1400Mlh - Srk-14H3

    2. KMS-1400MLH – SRK-14H3 Intentionally Left Blank Note: We reserve the right to make changes in specifications and design without prior notice.

  • Page 8: Condensing Unit

    B. Condensing Unit 1. SRK-14H AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE EXTERIOR DIMENSIONS ( WxDxH ) DIMENSIONS INCLUDING LEGS ( WxDxH ) EXTERIOR FINISH WEIGHT CONNECTIONS - ELECTRIC - REFRIGERANT COMPRESSOR CONDENSER COMPRESSOR PROTECTION FAN MOTOR PROTECTION REFRIGERANT CIRCUIT PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE...

  • Page 9: Srk-14H3

    2. SRK-14H3 Intentionally Left Blank Note: We reserve the right to make changes in specifications and design without prior notice.

  • Page 10: General Information

    II. General Information A. Construction 1. Icemaker Bin Control Switch Control Switch Service Switch Spray Tubes Hot Gas Valve Pump Motor Float Switch Drain Water Valve Liquid Line Valve Service Valve (High Side) Drier Wash Valve Thermistor Service Valve (Low Side) Harvest Water Valve Fill Water Valve Control Box...

  • Page 11: Condensing Unit

    2. Condensing Unit Liquid Line Valve Headmaster (C.P. Regulator) Shut-off Valve (Low Side) Control Box Junction Box Receiver Tank Accumulator Condenser Hot Gas Valve Compressor Thermostat (Discharge Pipe) Fan Motor and Fan Blade Shut-off Valve (High Side)

  • Page 12: Sequence Of Operation

    B. Sequence of Operation The steps in the sequence are as outlined below. When power is supplied, the red POWER OK LED and the green BC CLOSED LED on the control board come on (If the yellow BC OPEN LED is on, the unit will not start. In this case clear ice away from the bin control actuator in the bin area).

  • Page 13: Normal Harvest Cycle

    5. Normal Harvest Cycle LEDs 1, 4 and  are on. Comp, FMR and HGVs remain energized. HWV and X1 relay energize, PM stops. As the evaporator warms, the thermistor reaches 48°F (9°C). The control board then receives the thermistor's 3.9 kΩ signal and starts the harvest timer. When the harvest timer completes its count down, the harvest cycle is complete.

  • Page 15: Control Board

    C. Control Board • A HOSHIZAKI exclusive solid-state control is employed in the KMS-1400MLH Modular Crescent Cuber. • All models are pretested and factory-adjusted. 1. Fragile, handle very carefully. . A control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 16: Control Board Layout

    1. Control Board Layout Control Products "G" Control Board Alarm Reset Button Bin Control Switch Closed LED (green) Bin Control Switch Open LED (yellow) Part Number Alarm Buzzer LED  (green) Hot Gas Valves (HGV) Power LED (red) (lights when power is supplied to the board) LED 3 (green)

  • Page 17: Features

    2. Features a) Maximum Water Supply Period – 6 minutes The harvest water valve will be open during harvest for 6 minutes or the length of harvest minus 50 seconds, whichever is shorter. b) Harvest Backup Timer and Freeze Timer The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest cycle takes more than 0 minutes to complete.

  • Page 18: F) Led Lights And Audible Alarm Safeties

    f) LED Lights and Audible Alarm Safeties The control board includes LED indicator lights, audible alarm safeties, and an output test. The red LED indicates 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.

  • Page 19: Controls And Adjustments

    No adjustment is required under normal use, as the harvest timer is adjusted to the suitable position. Before changing this setting, contact Hoshizaki Technical Support 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 20: C) Pump-Out Timer (S4 Dip Switch 3 & 4)

    c) Pump-Out Timer (S4 dip switch 3 & 4) During cycles when a pump out is called for, the pump motor drains the water tank for the time determined by the pump-out timer (T1). The pump-out timer's harvest timer (T) acts in place of the harvest timer (S4 dip switch 1 &...

  • Page 21: F) Freeze Timer (S4 Dip Switch 9 & 10)

    f) Freeze Timer (S4 dip switch 9 & 10) Adjust to proper specification, or the unit may not operate correctly. The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze-up issues. Upon termination of freeze timer, the control board initiates the harvest cycle.

  • Page 22: Control Board Replacement

    5. Control Board Replacement The dip switches should be adjusted to the factory default settings as outlined in this manual. S4 dip switch #8 must remain off. D. Harvest Control – Thermistor A thermistor (semiconductor) is used for a harvest control sensor. The resistance varies depending on the suction line temperatures.

  • Page 23: Float Switch

    E. Float Switch 1. Explanation of Operation The float operates  switches within the float switch. The lower switch (black and blue wires) is used for low water safety protection, initiating the freeze cycle refill and terminating the freeze cycle. The upper switch (black and red wires) is used to terminate the freeze cycle refill only.
  • Page 24 Black - Commo Blue - Lower Switch Red - Upper Switch Mechanical Lock Housing Upper Switch Lower Switch Retainer Clip Float Fig. 1 Float Switch...

  • Page 25: Bin Control

    F. Bin Control This machine uses a lever-actuated proximity switch (mechanical bin control) to control the ice level in the storage bin. No adjustment is required. 1. Explanation of Operation The bin control is connected to the red K4 connector on the control board. When the bin control is calling for ice (proximity switch closed;...

  • Page 26: Switches

    G. Switches Two control switches are used to control operation in KMS Series Modular Crescent Cubers. These switches are referred to as the "control switch" and the "service switch" and are located on the control box. 1. Control Switch The control switch has three positions: "OFF" for power off; "ICE" for icemaking, and "SERVICE"...

  • Page 27: Technical Information

    III. Technical Information A. Water Circuit and Refrigeration Circuit...

  • Page 28: Wiring Diagrams

    B. Wiring Diagrams 1. KMS-1400MLH – SRK-14H...

  • Page 29: Kms-1400Mlh - Srk-14H3

    2. KMS-1400MLH – SRK-14H3...

  • Page 30: Wire Harness Connections

    3. Wire Harness Connections...

  • Page 31: Performance Data

    C. Performance Data 1. KMS-1400MLH – SRK-14H PERFORMANCE DATA NO. 08A001 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER WITH REMOTE COMPRESSOR/CONDENSER UNIT MODEL: KMS-1400MLH with SRK-14H APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR.

  • Page 32: Kms-1400Mlh - Srk-14H3

    2. KMS-1400MLH – SRK-14H3 Intentionally Left Blank Note: 1. Pressure data is recorded at 5 minutes into freezing 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 33: Service Diagnosis

    IV. Service Diagnosis A. 10-Minute 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 (1°C) or warmer air and 50°F (10°C) or warmer water temperatures.
  • Page 34 5) Freeze Cycle – LED 1 is on. The compressor, fan motors and pump motor remain energized. The liquid line valves energize and the hot gas valves de-energize (also de-energizing the X1 relay). The lower float switch activates (open)  times during the course of a freeze cycle;...
  • Page 35 6) Pump-Out Cycle – The 1st pump out occurs after the 11th freeze cycle and every 10th cycle thereafter. LEDs 1, 3,  are on. The compressor and fan motors remain energized. The drain water valve, hot gas valves and X1 relay energize, the liquid line valves de-energize.

  • Page 36: Diagnostic Charts

    B. Diagnostic Charts 1. No Ice Production Problem Possible Cause [1] The icemaker will not a) Power Supply start. (Condensing Unit) b) Water Supply c) High Pressure Control 1. Open contacts. d) Thermostat (Condensing Unit High Temperature Safety) e) Wire Harness Terminal Block: Condensing Unit and Icemaker f) Fuse (Icemaker fused...
  • Page 37 Problem Possible Cause [1] The icemaker will not l) Fill Water Valve start. (continuted) m) Control Board n) Control Board in Alarm 1. Audible alarm. [] Water continues to a) Float Switch be supplied, and the icemaker will not start. b) Control Board [3] Compressor will a) Control Switch...
  • Page 38 Problem Possible Cause [4] Water continues to a) Fill or Harvest Water be supplied in freeze Valve cycle (outside of b) Control Board refill). [5] No water comes from a) Water Supply Line spray tubes. Water pump will not start, or freeze cycle time is b) Fill or Harvest Water too short.

  • Page 39: Evaporator Is Frozen Up

    2. Evaporator is Frozen Up Problem Possible Cause [1]Freeze cycle time is a) Float Switch too long. b) Fill or Harvest Water Valve c) Control Board []All ice formed on a) Evaporator evaporator does not b) Water Supply Line fall into bin in harvest cycle.

  • Page 40: Low Ice Production

    3. Low Ice Production Problem Possible Cause [1] Freeze cycle time is a) See chart 1.[3]. Also check dirty condenser coil, ambient temperature and long. refrigerant charge. b) See chart .[1] and check float switch, water valves and control board. [] Harvest cycle time is a) See chart .[] and check evaporator, water supply line, harvest water valve, long.

  • Page 41: Removal And Replacement Of Components

    V. Removal and Replacement of Components 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 42: Brazing

    2. Brazing. 1. Refrigerant R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). . Refrigerant R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous.

  • Page 43: Condensing Unit

    Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the rating label inside the front panel on the icemaker or on the nameplate on the condensing unit. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No. 700-88 be used.

  • Page 44: Removal And Replacement Of Condenser

    11) Remove the plugs from the suction, discharge, and process pipes. 1) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG. 13) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG).

  • Page 45: Removal And Replacement Of Hot Gas Valve And Liquid Line Valve

    3. Removal and Replacement of Hot Gas Valve and Liquid Line Valve 1. The condensing unit has 1 hot gas valve and 1 liquid line valve. Both valves have a strainer prior to the valve body. It is advisable to change the strainer when replacing the hot gas or liquid line valve.

  • Page 46: Removal And Replacement Of Headmaster

    4. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P. Regulator) 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. Install the new drier with the arrow on the drier in the direction of the refrigerant flow.

  • Page 47: Icemaker

    5) Install the new fan motor and replace the removed parts in the reverse order of which they were removed. 6) Replace the panels in their correct positions. 7) Turn on the power supply. C. Icemaker Always install a new drier every time the sealed refrigeration system is opened.

  • Page 48: Removal And Replacement Of Expansion Valve

    2. Removal and Replacement of Expansion Valve 1. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant flow.

  • Page 49: Removal And Replacement Of Hot Gas Valve And Liquid Line Valve

    3. Removal and Replacement of Hot Gas Valve and Liquid Line Valve 1. The icemaker unit has 1 hot gas valve and 1 liquid line valve. The hot gas valve has a strainer prior to the valve body. It is advisable to change the strainer and check valves when replacing the hot gas valve.

  • Page 50: Removal And Replacement Of Pump Motor

    4. Removal and Replacement of Pump Motor 1) Turn off the power supply. ) Remove the panels. 3) Drain the water tank by removing the insulation panel, front frame and suction hose. (See Fig. 3.) 4) Disconnect the pump suction and discharge hoses.

  • Page 51: Removal And Replacement Of Thermistor

    6. Removal and Replacement of Thermistor 1. Fragile, handle very carefully. . 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 52: Cleaning And Maintenance

    4. Never run the icemaker when the water tank is empty. 1. Cleaning Procedure 1) Dilute  fl. oz. (650 ml) of the recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics Laboratory, Inc.) with 4 gal. (15 l) of warm water.
  • Page 53 e. Reassemble the float switch. Replace the rubber boot and the float switch in their correct positions. Reconnect the vent tube. f. Replace the right-side panel in its correct position. 9) Remove the insulation panel by removing the thumbscrews, then pour the cleaning solution into the water tank.

  • Page 54: Sanitizing Procedure - Following Cleaning Procedure

    2. Sanitizing Procedure - Following Cleaning Procedure 1) Dilute  fl. oz. (60 ml or 4 tbs) of a 5.5% sodium hypochlorite solution (chlorine bleach) with 4 gal. (15 l) of warm water. ) Remove the insulation panel if it is in its normal position. 3) Pour the sanitizing solution into the water tank.

  • Page 55: Preparing The Icemaker For Long Storage

    C. Preparing the Icemaker for Long Storage When shutting off the icemaker for an extended time, drain out all water from the water tank and remove the ice from the dispenser unit/storage bin. The dispenser unit/storage bin should be cleaned and dried. Drain the icemaker to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide.
  • Page 56 15) Move the control switch to the "OFF" position. 16) Disconnect the float switch vent hose from the drain hose tee. Move the service switch to the "DRAIN" position and the control switch to the "SERVICE" position. 17) From the tee on the drain hose, blow the drain water valve out using compressed air or carbon dioxide.

This manual is also suitable for:

Srk-14hSrk-14h3

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