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Summary of Contents for Hoshizaki AM-50BAJ
- Page 1 Service Manual Self-Contained Cuber Models AM-50BAJ AM-50BAJ-DS AM-50BAJ-AD AM-50BAJ-ADDS Number: 73218 hoshizakiamerica.com Issued: 12-18-2017 Revised: 5-30-2018...
- 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;...
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Page 3: Table Of Contents
VI. Preparing the Icemaker for Periods of Non-Use ............. 28 VII. Disposal ......................... 29 VIII. Technical Information ....................30 A. Specification and Performance Data ................30 1. AM-50BAJ(-DS) ..................... 30 2. AM-50BAJ-AD(ADDS) ................... 31 B. Wiring Diagrams ......................32 1. AM-50BAJ(-DS)(-AD)(-ADDS) ................32... -
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. •...
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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 Heat Exchanger Motor Water Tank Ice Storage Bin To Drain 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 1. Operation Diagnosis 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. Then LED 1 starts flashing, LED 3 turns on and Comp, HGV, and WV energize.
- Page 12 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 13 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.
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Page 14: 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 15: 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 16: 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 17 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 18 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.
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Page 19: 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 20: Control Board Layout
A. Control Board Layout • B1 Connector • C1 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 21: 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 22: Led Lights
C. LED Lights 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 23: 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 24 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.
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Page 25: 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 26: 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 27: Optional Drain Pump Hs-5061
B. Optional Drain Pump HS-5061 If the optional drain pump (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. 1) Move the control switch to the "OFF"... -
Page 28: 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 29: 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 30: Technical Information
We reserve the right to make changes in specifications and design without prior notice. A. Specification and Performance Data Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only. 1. AM-50BAJ(-DS) Specification Sheet AC SUPPLY VOLTAGE 115-120/60/1 AMPERAGE 3.8 A... -
Page 31: Am-50Baj-Ad(Adds)
2. AM-50BAJ-AD(ADDS) Specification Sheet AC SUPPLY VOLTAGE 115-120/60/1 AMPERAGE 3.8 A MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 238 (16.8) 227 (9.9) WATER gal./24HR (gal./100 lbs.) 22.0 (63.9) 30.0 (53.7) -
Page 32: Wiring Diagrams
B. Wiring Diagrams 1. AM-50BAJ(-DS)(-AD)(-ADDS) -
Page 33: Hs-5061 Optional Drain Pump
2. HS-5061 Optional Drain Pump To Icemaker...
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