Hoshizaki AM-50BAE Service Manual
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Hoshizaki AM-50BAE Service Manual

Hoshizaki AM-50BAE Service Manual

Self-contained cuber
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Self-Contained Cuber
Models
AM-50BAE
AM-50BAE-DS
AM-50BAE-AD
AM-50BAE-ADDS
SERVICE MANUAL
Number: 73126
Issued: 12-22-2004
Revised: 5-23-2013

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Summary of Contents for Hoshizaki AM-50BAE

  • Page 1 Hoshizaki Hoshizaki America, Inc. Self-Contained Cuber Models AM-50BAE AM-50BAE-DS AM-50BAE-AD AM-50BAE-ADDS SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com Number: 73126 Issued: 12-22-2004 Revised: 5-23-2013...
  • Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service of the appliance. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, send an e-mail message, or write to the Hoshizaki Technical Support Department for assistance. Phone: 1-800-233-1940; (770) 487-2331 Fax: 1-800-843-1056;...

  • Page 3: Table Of Contents

    IMPORTANT This manual should be read carefully before the appliance is serviced. Read the warnings and guidelines contained in this manual carefully as they provide essential information for the continued safe use, service, and maintenance of the appliance. Retain this manual for any further reference that may be necessary. CONTENTS Important Safety Information ....................

  • Page 4: Important Safety Information

    Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, damage to the appliance, or damage to property. WARNING Indicates a hazardous situation which could result in death or serious injury.
  • Page 5 WARNING, continued • Do not make any alterations to the appliance. Alterations could result in electric shock, serious injury, fire, or damage. • Do not use an extension cord. • Do not use an appliance with a damaged power cord. The power cord should not be altered, jerked, bundled, weighed down, pinched, or tangled.
  • Page 6 NOTICE • Protect the floor when moving the appliance to prevent damage to the floor. • When making water supply or drain line repairs, follow the requirements found in the instruction manual to reduce the risk of costly water damage. •...

  • Page 7: Construction And Water/Refrigeration Circuit Diagram

    I. Construction and Water/Refrigeration Circuit Diagram A. Construction Top Panel Ice Making Mechanism Bin Control Thermostat Bulb Scoop Holder Slope Magnet Catch Front Panel Control Switch Door Power Cord Louver...

  • Page 8: Water/Refrigeration Circuit Diagram

    B. Water/Refrigeration Circuit Diagram Capillary Tube Accumulator Evaporator Inlet Water Valve Thermistor Ice Chute Spray Assembly Pump Motor Water Tank Ice Storage Bin To Drain Heat Exchanger Hot Gas Valve Condenser Drier Strainer Compressor Water Circuit Refrigeration Circuit...

  • Page 9: Sequence Of Operation And Service Diagnosis

    II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart...

  • Page 10: Service Diagnosis

    B. Service Diagnosis WARNING • The appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Risk of electric shock. Use extreme caution and exercise safe electrical practices. •...

  • Page 11: Diagnostic Procedure: Auxiliary Code C-0 And Earlier

    1. Diagnostic Procedure: Auxiliary Code C-0 and Earlier 3) Power On/Initial Harvest Cycle. Move the control switch to the "ICE" position. Comp, HGV, and WV energize. Initial harvest cycle starts. 50-sec. HT and 102-sec. WVT start. a) Power On Diagnosis: If Comp, HGV, and WV do not energize, confirm appliance is plugged into electrical outlet.
  • Page 12 4) Initial Freeze Cycle. Comp and 102-sec. WVT (WV continues another 52 sec. in freeze cycle) continue. FM and PM energize. HGV de-energizes. When 102-sec. WVT terminates, WV de-energizes. CB monitors the cooling of the evaporator via the thermistor located on the evaporator for freeze termination. When the thermistor drops to 27°F (-3°C), CB reads 6.8 kΩ...
  • Page 13 c) WV Diagnosis: Check that water enters the water tank. If not, check that the water supply line shut-off valve is open and screens or external filters are clear. Check for 115VAC at CB C2 (BK) to neutral (W) and CB A2 (V) to neutral (W). If 115VAC is not present at CB C2 (BK) to neutral (W), check wiring from BC.

  • Page 14: Diagnostic Procedure: Auxiliary Code C-1 And Later

    2. Diagnostic Procedure: Auxiliary Code C-1 and Later 3) Power On/Initial Harvest Cycle – LED 1 is flashing and LED 3 is on. Move the control switch to the "ICE" position. LEDs 1 (green), 3 (green), and 4 (orange) turn on briefly then turn off.
  • Page 15 4) Initial Freeze Cycle – LED 1 is flashing and LEDs 3 and 2 are on. Comp and 102-sec. WVT (WV continues another 52 sec. in freeze cycle) continue. FM and PM energize. HGV de-energizes. When 102-sec. WVT terminates, LED 3 turns off and WV de-energizes.
  • Page 16 b) HGV Diagnosis: If Comp is energized and evaporator is not warming, check that HGV energizes and opens. If not, check for 115VAC at CB C1 (BR) to neutral (W) and CB B1 (P) to neutral (W). If 115VAC is present at CB C1 (BR) to neutral (W) and not at CB B1 (P) to neutral (W), replace CB.

  • Page 17: Bin Control Check

    7) Shutdown. When the appliance is running, hold ice in contact with the thermostatic bulb. BC switch opens within 10 sec., shutting down the appliance. BC is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations.

  • Page 18: Thermistor Check

    D. Thermistor Check To check thermistor resistance, follow the steps below. 1) Move the control switch to the "OFF" position. 2) Unplug the appliance. 3) Remove the control box cover. 4) Remove the thermistor from the evaporator. 5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min. 6) Disconnect the thermistor connector from CB and check the resistance between thermistor leads.

  • Page 19: Diagnostic Tables

    E. Diagnostic Tables 1. No Ice Production No Ice Production - Possible Cause 1. Power Supply a) Unplugged, off, blown fuse, or tripped breaker. b) Not within specifications. 2. Water Supply a) Water supply off or improper water pressure. b) External water filters clogged. 3.
  • Page 20 2. Freeze-Up Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See the Hoshizaki America Technician's Pocket Guide or contact your local distributor for a copy of the freeze-up checklist. Freeze-Up - Possible Cause Harvest Cycle 1.

  • Page 21: Low Ice Production

    3. Low Ice Production Low Ice Production - Possible Cause Long Harvest Cycle 1. Evaporator a) Scaled up, dirty. 2. Ice Chute a) Out of position. b) Damaged. 3. Refrigerant Charge a) Low. 4. Control Board a) Thermistor connection loose. See "III.B.

  • Page 22: Control Board

    III. Control Board • A Hoshizaki exclusive control board is employed in AM series appliances. • All models are pretested and factory adjusted. NOTICE • Fragile, handle very carefully. • The control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 23: Control Board Layout

    A. Control Board Layout 1. Auxiliary Code C-0 and Earlier • C1 Connector 115VAC X1 Relay Component Power Supply (hot gas valve, pump motor, fan motor) • B1 Connector Hot Gas Valve • A1 Connector Pump Motor Fan Motor • X1 Relay Hot Gas Valve •...

  • Page 24: Auxiliary Code C-1 And Later

    2. Auxiliary Code C-1 and Later • C1 Connector • B1 Connector Hot Gas Valve 115VAC X1 Relay Component Power Supply (hot gas valve, pump motor, and fan motor) • A1 Connector Pump Motor Fan Motor • C2 Connector • X1 Relay 115VAC X2 Relay Component Power Supply Hot Gas Valve (inlet water valve)

  • Page 25: Settings And Adjustments

    B. Settings and Adjustments 1) VR1 Harvest Control VR1 harvest control is for adjustment of the harvest cycle completion temperature. Factory set, do not adjust. NOTICE Do not adjust VR1 harvest control. VR1 harvest control is factory set for proper operation.

  • Page 26: Led Lights Auxiliary Code C-1 And Later

    C. LED Lights Auxiliary Code C-1 and Later 1) LED 1 24VAC Green LED 1 flashes to indicate proper 24VAC and continues to flash unless BC is open, control switch is moved to the "OFF" position, or appliance is unplugged. 2) LED 2 Freeze Green LED 2 (PM) turns on at freeze cycle initiation and turns off at freeze cycle termination.

  • Page 27: Refrigeration Circuit And Component Service Information

    IV. Refrigeration Circuit and Component Service Information WARNING • This appliance should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. • Move the control switch to the "OFF" position, then unplug the appliance from the electrical outlet before servicing.
  • Page 28 Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

  • Page 29: Component Service Information

    • Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu Silicones), or equivalent are recommended.

  • Page 30: Maintenance

    V. Maintenance This appliance must be maintained in accordance with the instruction manual and labels provided with the appliance. Consult with your local Hoshizaki Certified Service Representative about maintenance service. WARNING • Only qualified service technicians should service this appliance.

  • Page 31: Optional Drain Pump Hs-0248 Or Hs-5061

    B. Optional Drain Pump HS-0248 or HS-5061 If the optional drain pump (HS-0248 or HS-5061) is installed, test its operation at least once a year as outlined below. Note that the pump has power even when the control switch is in the "OFF" position. NOTICE If the optional drain pump is not operating properly or not primed properly (HS-0248), it will adversely affect performance, component life, and warranty...
  • Page 32 8) Remove the discharge hose restriction and allow the water to be pumped out normally. Power to the appliance will be restored when the water in the drain pump returns to a normal level. 9) If the appliance fails to turn off with the discharge hose restricted or the drain pump fails to pump out the water, replace the drain pump.

  • Page 33: Preparing The Icemaker For Periods Of Non-Use

    VI. Preparing the Icemaker for Periods of Non-Use During extended periods of non-use, extended absences, or in sub-freezing temperatures, follow the instructions below. When the appliance is not used for two or three days under normal conditions, it is sufficient to move the control switch to the "OFF" position.

  • Page 34: Disposal

    VII. Disposal This appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulations. Refrigerant must be recovered by properly certified service personnel.

  • Page 35: Technical Information

    VIII. Technical Information A. Specification and Performance Data 1. AM-50BAE, AM-50BAE-DS, AM-50BAE-AD, AM-50BAE-ADDS SPECIFICATION SHEET MODEL: AM-50BAE, AM-50BAE-DS, AM-50BAE-AD, AM-50BAE-ADDS AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 3.4 A (5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A...

  • Page 36: Wiring Diagrams

    B. Wiring Diagrams 1. Auxiliary Code C-0 and Earlier...

  • Page 37: Auxiliary Code C-1 And Later

    2. Auxiliary Code C-1 and Later...

  • Page 38: Hs-0248 And Hs-5061 Optional Drain Pump

    3. HS-0248 and HS-5061 Optional Drain Pump a) HS-0248 To Icemaker b) HS-5061 To Icemaker...

This manual is also suitable for:

Am-50bae-adAm-50bae-dsAm-50bae-adds

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