Related Manuals for Hoshizaki KM-901MAJ
Summary of Contents for Hoshizaki KM-901MAJ
- Page 1 Service Manual Modular Crescent Cuber Models KM-901MAJ, MWJ, MRJ/3 KM-1100MAJ, MWJ, MRJ KM-1340MAJ, MWJ, MRJ/3 KM-1601MRJ/3 Number: 73213 hoshizakiamerica.com Issued: 1-30-2018 Revision: 2-13-2018...
- Page 1 Service Manual Modular Crescent Cuber Models KM-901MAJ, MWJ, MRJ/3 KM-1100MAJ, MWJ, MRJ KM-1340MAJ, MWJ, MRJ/3 KM-1601MRJ/3 Number: 73213 hoshizakiamerica.com Issued: 1-30-2018 Revision: 11-23-2020...
- 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 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
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 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 VI. Preparing the Appliance for Periods of Non-Use ............49 VII. Disposal ......................... 51 VIII. Technical Information ....................52 A. Specification and Performance Data Sheets ............... 52 1. KM-901MAJ ......................52 2. KM-901MWJ ......................53 3. KM-901MRJ with URC-9F ..................54 4. KM-901MRJ3 with URC-9F ................... 55 5.
- Page 4 VI. Preparing the Appliance for Periods of Non-Use ............49 VII. Disposal ......................... 51 VIII. Technical Information ....................52 A. Specification and Performance Data Sheets ............... 52 1. KM-901MAJ ......................52 2. KM-901MWJ ......................53 3. KM-901MRJ with URC-14F ................... 54 4. KM-901MRJ3 with URC-14F ................. 55 5.
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Page 5: 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: 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 6 WARNING, continued • Children should be properly supervised around this appliance. • Do not climb, stand, or hang on the appliance or allow children or animals to do so. Serious injury could occur or the appliance could be damaged. • Do not use combustible spray or place volatile or flammable substances near the appliance.
- Page 6 WARNING, continued • Children should be properly supervised around this appliance. • Do not climb, stand, or hang on the appliance or allow children or animals to do so. Serious injury could occur or the appliance could be damaged. • Do not use combustible spray or place volatile or flammable substances near the appliance.
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Page 7: Construction And Water/Refrigeration Circuit Diagram
1. Air-Cooled Models (MAJ) Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Thermostatic Expansion Valve Cleaning Valve Condenser Control Switch Fan Motor High-Pressure Switch Float Switch Drier Control Box Water Pump Liquid Line Valve Compressor Model Shown: KM-901MAJ... -
Page 7: Construction And Water/Refrigeration Circuit Diagram
1. Air-Cooled Models (MAJ) Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Thermostatic Expansion Valve Cleaning Valve Condenser Control Switch Fan Motor High-Pressure Switch Float Switch Drier Control Box Water Pump Liquid Line Valve Compressor Model Shown: KM-901MAJ... -
Page 8: Water-Cooled Models (Mwj)
2. Water-Cooled Models (MWJ) Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Thermostatic Cleaning Valve Expansion Valve Control Switch Water Regulating Valve Condenser Float Switch Water Pump Control Box High-Pressure Switch Compressor Drier Liquid Line Valve Model Shown: KM-1100MWJ... -
Page 8: Water-Cooled Models (Mwj)
2. Water-Cooled Models (MWJ) Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Thermostatic Cleaning Valve Expansion Valve Control Switch Water Regulating Valve Condenser Float Switch Water Pump Control Box High-Pressure Switch Compressor Drier Liquid Line Valve Model Shown: KM-1100MWJ... -
Page 9: Remote Models (Mrj/3)
3. Remote Models (MRJ/3) Hot Gas Valve Spray Tubes Water Supply Inlet Inlet Water Valve Cleaning Valve Junction Boxes Control Switch Thermostatic Expansion Valves Control Box Float Switch Receiver Tank Main Transformer Water Pump Drier Crankcase Liquid Line Valve Heater Compressor Model Shown: KM-1601MRJ... -
Page 9: Remote Models (Mrj/3)
3. Remote Models (MRJ/3) Hot Gas Valve Spray Tubes Water Supply Inlet Inlet Water Valve Cleaning Valve Junction Boxes Control Switch Thermostatic Expansion Valves Control Box Float Switch Receiver Tank Main Transformer Water Pump Drier Crankcase Liquid Line Valve Heater Compressor Model Shown: KM-1601MRJ... -
Page 10: Water/Refrigeration Circuit Diagram
B. Water/Refrigeration Circuit Diagram 1. Air-Cooled Models (MAJ) Spray Tubes Condenser Inlet Water Valve Drier High-Pressure Evaporator Water Supply Switch Liquid Line Valve Heat Thermistor Exchanger Suction Line Strainer Water Pump Float Switch Hot Gas Water Valve Tank Discharge Line Compressor Pump Out Freeze... -
Page 10: Water/Refrigeration Circuit Diagram
B. Water/Refrigeration Circuit Diagram 1. Air-Cooled Models (MAJ) Spray Tubes Condenser Inlet Water Valve Drier High-Pressure Evaporator Water Supply Switch Liquid Line Valve Heat Thermistor Exchanger Suction Line Strainer Water Pump Float Switch Hot Gas Water Valve Tank Discharge Line Compressor Pump Out Freeze... -
Page 11: Water-Cooled Models (Mwj)
2. Water-Cooled Models (MWJ) Water Regulating Valve Condenser Spray Tubes Inlet Water Valve Drier Evaporator Water Supply Liquid Line Valve Heat Thermistor Exchanger High-Pressure Switch Suction Line Strainer Water Pump Float Switch Hot Gas Water Valve Tank Discharge Line Compressor Freeze Pump Out Drain... -
Page 11: Water-Cooled Models (Mwj)
2. Water-Cooled Models (MWJ) Water Regulating Valve Condenser Spray Tubes Inlet Water Valve Drier Evaporator Water Supply Liquid Line Valve Heat Thermistor Exchanger High-Pressure Switch Suction Line Strainer Water Pump Float Switch Hot Gas Water Valve Tank Discharge Line Compressor Freeze Pump Out Drain... -
Page 12: Remote Models (Mrj/3)
3. Remote Models (MRJ/3) Condenser Headmaster (C.P.R.) Spray Tubes Access Valve Inlet Water Valve Drier Water Supply High-Pressure Receiver Switch Strainer Liquid Line Hot Gas Evaporator Valve Valve Heat Exchanger Thermistor Cleaning Valve Check Valves Suction Line Water Pump Float Switch Water Tank Discharge Line... -
Page 12: Remote Models (Mrj/3)
3. Remote Models (MRJ/3) Condenser Headmaster (C.P.R.) Spray Tubes Access Valve Inlet Water Valve Drier Water Supply High-Pressure Receiver Switch Strainer Liquid Line Hot Gas Evaporator Valve Valve Heat Exchanger Thermistor Cleaning Valve Check Valves Suction Line Water Pump Float Switch Water Tank Discharge Line... -
Page 13: Sequence Of Operation And Service Diagnosis
II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart 1. Operation Flow Chart... -
Page 13: Sequence Of Operation And Service Diagnosis
II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart 1. Operation Flow Chart... - Page 14 2. Shutdown Flow Chart...
- Page 14 2. Shutdown Flow Chart...
- Page 15 3. Freeze-Time Correction Chart...
- Page 15 3. Freeze-Time Correction Chart...
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Page 16: 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. Control switch in "OFF" position does not de-energize all loads Use extreme caution and exercise safe electrical practices. -
Page 16: 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. Control switch in "OFF" position does not de-energize all loads Use extreme caution and exercise safe electrical practices. - Page 17 1. Sequence and Component Diagnosis 3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED and CB green "BC CLOSED" LED turn on. If CB yellow "BC OPEN" LED is on (indicating a full bin), check CB K4 red jumper.
- Page 17 1. Sequence and Component Diagnosis 3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED and CB green "BC CLOSED" LED turn on. If CB yellow "BC OPEN" LED is on (indicating a full bin), check CB K4 red jumper.
- Page 18 4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FM*, FMR energized), continue to step 5a. If FS is open, WV remains energized until FS closes (low water safety protection during initial start up and at the end of each harvest).
- Page 18 4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FM*, FMR energized), continue to step 5a. If FS is open, WV remains energized until FS closes (low water safety protection during initial start up and at the end of each harvest).
- Page 19 5b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). When WV de-energizes, LED 4 turns off, X11 relay de-energizes and LED 3 turns on.
- Page 19 5b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). When WV de-energizes, LED 4 turns off, X11 relay de-energizes and LED 3 turns on.
- Page 20 a) Freeze Cycle Diagnosis: Confirm Comp, FM*, FMR, and PM continue. Confirm that FM and LLV energize. Confirm WRV opens. Next, confirm HGV and X10 relay de-energize. During the first 5 min. of freeze, confirm evaporator is cooling. If not, confirm WV de-energized (not leaking by), HGV de-energized (not bypassing), LLV and FM energize, TXV and HM operate correctly, WRV opens, Comp is efficient, and refrigerant charge is correct.
- Page 20 a) Freeze Cycle Diagnosis: Confirm Comp, FM*, FMR, and PM continue. Confirm that FM and LLV energize. Confirm WRV opens. Next, confirm HGV and X10 relay de-energize. During the first 5 min. of freeze, confirm evaporator is cooling. If not, confirm WV de-energized (not leaking by), HGV de-energized (not bypassing), LLV and FM energize, TXV and HM operate correctly, WRV opens, Comp is efficient, and refrigerant charge is correct.
- Page 21 f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling, check refrigerant pressures. See "VIII.A. Specification and Performance Data Sheets." Next, check HM operation. If refrigeration pressures are above HM setpoint and HM is bypassing, replace HM. Check TXV for proper operation. Remove TXV bulb and hold it in your hand, refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant low-side pressure should drop.
- Page 21 f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling, check refrigerant pressures. See "VIII.A. Specification and Performance Data Sheets." Next, check HM operation. If refrigeration pressures are above HM setpoint and HM is bypassing, replace HM. Check TXV for proper operation. Remove TXV bulb and hold it in your hand, refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant low-side pressure should drop.
- Page 22 FM and LLV de-energize. PM stops for 2 sec., then reverses for 10/20 sec. depending on pump-out timer (S4 dip switch 3 & 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-out frequency control (S4 dip switch 5) is factory set, and generally no adjustment is required.
- Page 22 FM and LLV de-energize. PM stops for 2 sec., then reverses for 10/20 sec. depending on pump-out timer (S4 dip switch 3 & 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-out frequency control (S4 dip switch 5) is factory set, and generally no adjustment is required.
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Page 23: Freeze-Time Correction Cycle (90 Min.)
C. Freeze-Time Correction Cycle (90 min.) Freeze-Time Correction function is enabled when S4 Dip Switch 7 is in the "ON" position and initiates when the minimum and maximum freeze times have exceeded differential parameters. Freeze-time correction timer and count starts at the beginning of the 2nd freeze cycle after startup from power off condition. -
Page 23: Freeze-Time Correction Cycle (90 Min.)
C. Freeze-Time Correction Cycle (90 min.) (Control Board 2A7664-02) Freeze-Time Correction function is enabled when S4 Dip Switch 7 is in the "ON" position and initiates when the minimum and maximum freeze times have exceeded differential parameters. Freeze-time correction timer and count starts at the beginning of the 2nd freeze cycle after startup from power off condition. - Page 24 2) Freeze-Time Correction Sequence: First occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters. CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts. Second occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters.
- Page 24 2) Freeze-Time Correction Sequence: First occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters. CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts. Second occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters.
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Page 25: Control Board Check
D. Control Board Check Before replacing CB 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. Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB while CB is beeping. -
Page 25: Control Board Check
D. Control Board Check Before replacing CB 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. Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB while CB is beeping. -
Page 26: Bin Control Check
E. Bin Control Check BC shuts down the icemaker within 10 sec. when ice contacts the thermostatic bulb, regardless of the cycle at activation. NOTICE When the ambient temperature is below 45°F (7°C), BC opens and shuts down the appliance even if the ice storage bin is empty. When BC is set in the prohibited range, the appliance operates continuously even if the ice storage bin is filled with ice. -
Page 26: Bin Control Check
E. Bin Control Check BC shuts down the icemaker within 10 sec. when ice contacts the thermostatic bulb, regardless of the cycle at activation. NOTICE When the ambient temperature is below 45°F (7°C), BC opens and shuts down the appliance even if the ice storage bin is empty. When BC is set in the prohibited range, the appliance operates continuously even if the ice storage bin is filled with ice. -
Page 27: Float Switch Check And Cleaning
F. Float Switch Check and Cleaning FS is used to determine that there is sufficient water in the water tank after the 1-min. fill cycle and after each harvest cycle. FS is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required. -
Page 27: Float Switch Check And Cleaning
F. Float Switch Check and Cleaning FS is used to determine that there is sufficient water in the water tank after the 1-min. fill cycle and after each harvest cycle. FS is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required. -
Page 28: Float Switch Cleaning
6) Wipe down FS housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. -
Page 28: Float Switch Cleaning
6) Wipe down FS housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. -
Page 29: Thermistor Check
G. Thermistor Check To check thermistor resistance, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel. Move the control switch to the "OFF" position. 3) Remove the control box cover. 4) Remove the thermistor from the refrigerant tubing. 5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min. -
Page 29: Thermistor Check
G. Thermistor Check To check thermistor resistance, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel. Move the control switch to the "OFF" position. 3) Remove the control box cover. 4) Remove the thermistor from the refrigerant tubing. 5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min. -
Page 30: Diagnostic Tables
I. Diagnostic Tables 1. No Ice Production No Ice Production - Possible Cause 1. Power Supply a) Off, blown fuse, or tripped breaker. b) Not within specifications. 2. Main Transformer a) Voltage tap switch not set to proper voltage. (208-230/60/1 Models with main b) Coil winding open or shorted. -
Page 30: Diagnostic Tables
I. Diagnostic Tables 1. No Ice Production No Ice Production - Possible Cause 1. Power Supply a) Off, blown fuse, or tripped breaker. b) Not within specifications. 2. Main Transformer a) Voltage tap switch not set to proper voltage. (208-230/60/1 Models with main b) Coil winding open or shorted. - Page 31 2. Freeze-Up Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See "II.J. Freeze Up Check List," the Hoshizaki America Technician's Pocket Guide, or contact your local distributor for a copy of the freeze-up checklist.
- Page 31 2. Freeze-Up Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See "II.J. Freeze Up Check List," the Hoshizaki America Technician's Pocket Guide, or contact your local distributor for a copy of the freeze-up checklist.
- Page 32 Freeze-Up - Possible Cause 10. Thermistor a) Loose, disconnected, or defective. See "II.G. Thermistor Check" 11. Thermostatic Expansion Valve a) Defective. 12. Hot Gas Valve a) Closed or restricted. 13. Liquid Line Valve a) Open. Freeze Cycle 1. Evaporator a) Scaled up. b) Damaged.
- Page 32 Freeze-Up - Possible Cause 10. Thermistor a) Loose, disconnected, or defective. See "II.G. Thermistor Check" 11. Thermostatic Expansion Valve a) Defective. 12. Hot Gas Valve a) Closed or restricted. 13. Liquid Line Valve a) Open. Freeze Cycle 1. Evaporator a) Scaled up. b) Damaged.
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Page 33: Low Ice Production
3. Low Ice Production Low Ice Production - Possible Cause Long Harvest Cycle 1. Evaporator a) Scaled up. 2. Spray Tubes and/or Spray a) Dirty. Guides b) Out of position. 3. Refrigerant Charge a) Low. 4. Water Supply a) Low water pressure. b) External water filters clogged. -
Page 33: Low Ice Production
3. Low Ice Production Low Ice Production - Possible Cause Long Harvest Cycle 1. Evaporator a) Scaled up. 2. Spray Tubes and/or Spray a) Dirty. Guides b) Out of position. 3. Refrigerant Charge a) Low. 4. Water Supply a) Low water pressure. b) External water filters clogged. -
Page 34: Freeze-Up Check List
J. Freeze-Up Check List Freeze-Up Check List Please Complete When Diagnosing a Freeze-Up, Refrigerant Leak, or Low Charge Technical Support Fax #: 770-487-3360 Make Copies And Use As Needed Model #___________________________ Serial # ____________________Install Date____________Freeze-Up Date___________ List model and manufacture of bin or dispenser__________________________. Date appliance was last cleaned:__________. -
Page 34: Freeze-Up Check List
J. Freeze-Up Check List Freeze-Up Check List Please Complete When Diagnosing a Freeze-Up, Refrigerant Leak, or Low Charge Technical Support Fax #: 770-487-3360 Make Copies And Use As Needed Model #___________________________ Serial # ____________________Install Date____________Freeze-Up Date___________ List model and manufacture of bin or dispenser__________________________. Date appliance was last cleaned:__________. -
Page 35: Controls And Adjustments
III. Controls and Adjustments • A Hoshizaki exclusive control board is employed in KM series appliances. • All models are pretested and factory adjusted. • For a control board check procedure, see "II.D. Control Board Check." NOTICE • Fragile, handle very carefully. -
Page 35: Controls And Adjustments
III. Controls and Adjustments • A Hoshizaki exclusive control board is employed in KM series appliances. • All models are pretested and factory adjusted. • For a control board check procedure, see "II.D. Control Board Check." NOTICE • Fragile, handle very carefully. -
Page 36: Control Board Layout
A. Control Board Layout 1. "J" Control Board "J" Control Board • Bin Control Switch Closed LED (green) • "OUTPUT TEST" Button • S4 Dip Switch • "ALARM RESET" Button (on continuously (used to test relays on control board) in thermostatic bin control application) •... -
Page 36: Control Board Layout
A. Control Board Layout 1. "J" Control Board "J" Control Board • Bin Control Switch Closed LED (green) • "OUTPUT TEST" Button • S4 Dip Switch • "ALARM RESET" Button (on continuously (used to test relays on control board) in thermostatic bin control application) •... -
Page 37: Led Lights And Audible Alarm Safeties
B. LED Lights and Audible Alarm Safeties Beep occurs and red "POWER OK" LED turns on when control switch is moved to "ICE" position. Sequence Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table below. -
Page 37: Led Lights And Audible Alarm Safeties
B. LED Lights and Audible Alarm Safeties Beep occurs and red "POWER OK" LED turns on when control switch is moved to "ICE" position. Sequence Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table below. -
Page 38: Settings And Adjustments
Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact your Hoshizaki Service Center. 1. Default Dip Switch Settings The dip switches are factory-adjusted to the following positions for both the 2A7664-01and 2A7664-02 control boards: S4 Dip Switch No. -
Page 38: Settings And Adjustments
OFF OFF OFF OFF OFF OFF ON OFF OFF OFF KM-1601MRJ3 S5 Dip Switch (Do Not Adjust) "J" Control Board Dip Switch No. KM-901MAJ, MWJ, MRJ/3 OFF OFF OFF OFF OFF KM-1100MAJ, MWJ, MRJ KM-1340MAJ, MWJ, MRJ/3 OFF OFF OFF OFF ON... -
Page 39: Harvest Timer (S4 Dip Switch 1 & 2)
Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production. -
Page 39: Harvest Timer (S4 Dip Switch 1 & 2)
Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production. -
Page 40: Pump-Out Frequency Control (S4 Dip Switch 5)
4. Pump-Out Frequency Control (S4 dip switch 5) The pump-out frequency control is factory set to drain the water tank every 10 cycles. Generally no adjustment is required. However, where water quality is bad and the icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The pump-out frequency control can be set to have a pump-out occur every cycle, or every 10 cycles. -
Page 40: Pump-Out Frequency Control (S4 Dip Switch 5)
4. Pump-Out Frequency Control (S4 dip switch 5) The pump-out frequency control is factory set to drain the water tank every 10 cycles. Generally no adjustment is required. However, where water quality is bad and the icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The pump-out frequency control can be set to have a pump-out occur every cycle, or every 10 cycles. -
Page 41: Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 Dip Switch 7)
6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the appliance. a) Harvest Pump Time (Harvest Assist) Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized during the last seconds of the harvest cycle. -
Page 41: Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 Dip Switch 7)
6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the appliance. a) Harvest Pump Time (Harvest Assist) Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized during the last seconds of the harvest cycle. -
Page 42: Freeze Timer (S4 Dip Switch 9 & 10)
In this case, see "II.I.3. Low Ice Production" for possible solutions. The freeze timer is factory set and no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. -
Page 42: Freeze Timer (S4 Dip Switch 9 & 10)
In this case, see "II.I.3. Low Ice Production" for possible solutions. The freeze timer is factory set and no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. -
Page 43: Minimum Harvest Time (S5 Dip Switch 4)
11. Minimum Harvest Time (S5 dip switch 4) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside the factory default setting may result in damage to the appliance. S5 Dip Switch Setting Minimum Harvest Timer No. 4 120 sec. 70 sec. -
Page 43: Minimum Harvest Time (S5 Dip Switch 4)
11. Minimum Harvest Time (S5 dip switch 4) NOTICE Factory set for proper operation. Do not adjust. Adjustment outside the factory default setting may result in damage to the appliance. S5 Dip Switch Setting Minimum Harvest Timer No. 4 120 sec. 70 sec. -
Page 44: 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 and turn off the power supply. Place the disconnect in the "OFF"... -
Page 44: 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 and turn off the power supply. Place the disconnect in the "OFF"... - Page 45 2. Brazing WARNING • R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). • 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 45 2. Brazing WARNING • R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). • 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 46 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 46 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 47: Component Service Information
• The thermistor should be at the 12 o'clock position on the tube. • 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 47: Component Service Information
• The thermistor should be at the 12 o'clock position on the tube. • 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 48: Maintenance
V. Maintenance The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the appliance's environment, and local sanitation regulations WARNING • Only qualified service technicians should service the appliance. • To reduce the risk of electric shock, do not touch the control switch or service switch with damp hands •... -
Page 48: Maintenance
V. Maintenance The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the appliance's environment, and local sanitation regulations WARNING • Only qualified service technicians should service the appliance. • To reduce the risk of electric shock, do not touch the control switch or service switch with damp hands •... -
Page 49: Preparing The Appliance For Periods Of Non-Use
VI. Preparing the Appliance for Periods of Non-Use NOTICE • When storing the appliance for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. • To prevent damage to the water pump, do not operate the appliance with the control switch in the "WASH"... -
Page 49: Preparing The Appliance For Periods Of Non-Use
VI. Preparing the Appliance for Periods of Non-Use NOTICE • When storing the appliance for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. • To prevent damage to the water pump, do not operate the appliance with the control switch in the "WASH"... - Page 50 3. On water-cooled model, remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front panel and right side panel. 2) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve.
- Page 50 3. On water-cooled model, remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front panel and right side panel. 2) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve.
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Page 51: Disposal
VII. Disposal The 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 51: Disposal
VII. Disposal The 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 52: Technical Information
We reserve the right to make changes in specifications and design without prior notice. A. Specification and Performance Data Sheets Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only. 1. KM-901MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1... -
Page 52: Technical Information
We reserve the right to make changes in specifications and design without prior notice. A. Specification and Performance Data Sheets Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only. 1. KM-901MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1... -
Page 53: Km-901Mwj
2. KM-901MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 10 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1290 (3.56) 1280 (3.23) WATER gal./24HR (gal./100 lbs.) 139 (16.0) 230 (24.2) WATER COOLED CONDENSER 983 (113) -
Page 53: Km-901Mwj
2. KM-901MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 10 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1290 (3.56) 1280 (3.23) WATER gal./24HR (gal./100 lbs.) 139 (16.0) 230 (24.2) WATER COOLED CONDENSER 983 (113) -
Page 54: Km-901Mrj With Urc-9F
3. KM-901MRJ with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1610 (4.52) 1490 (3.96) WATER gal./24HR (gal./100 lbs.) 136 (16.0) 271 (30.0) ICE PRODUCTION PER CYCLE... -
Page 54: Km-901Mrj With Urc-9F
3. KM-901MRJ with URC-9F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1610 (4.52) 1490 (3.96) WATER gal./24HR (gal./100 lbs.) 136 (16.0) 271 (30.0) ICE PRODUCTION PER CYCLE... -
Page 55: Km-901Mrj3 With Urc-9F
4. KM-901MRJ3 with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.1 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1520 (4.40) 1410 (3.65) WATER gal./24HR (gal./100 lbs.) 125 (15.0) 259 (28.0) ICE PRODUCTION PER CYCLE... -
Page 55: Km-901Mrj3 With Urc-9F
4. KM-901MRJ3 with URC-9F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 7.1 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1520 (4.40) 1410 (3.65) WATER gal./24HR (gal./100 lbs.) 125 (15.0) 259 (28.0) ICE PRODUCTION PER CYCLE... -
Page 56: Km-1100Maj
5. KM-1100MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1910 (4.90) 1810 (4.00) WATER gal./24HR (gal./100 lbs.) 178 (19.0) 467 (43.0) ICE PRODUCTION PER CYCLE 20.7 lbs. -
Page 56: Km-1100Maj
5. KM-1100MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1910 (4.90) 1810 (4.00) WATER gal./24HR (gal./100 lbs.) 178 (19.0) 467 (43.0) ICE PRODUCTION PER CYCLE 16.5 lbs. -
Page 57: Km-1100Mwj
6. KM-1100MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 9.6 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1680 (4.00) 1610 (3.60) WATER gal./24HR (gal./100 lbs.) 201 (20.0) 395 (36.8) WATER COOLED CONDENSER 1076 (107) -
Page 57: Km-1100Mwj
6. KM-1100MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 9.6 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1680 (4.00) 1610 (3.60) WATER gal./24HR (gal./100 lbs.) 201 (20.0) 395 (36.8) WATER COOLED CONDENSER 1076 (107) -
Page 58: Km-1100Mrj
7. KM-1100MRJ with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1930 (4.50) 1840 (3.82) WATER gal./24HR (gal./100 lbs.) 185 (18.0) 451 (39.0) ICE PRODUCTION PER CYCLE... -
Page 58: Km-1100Mrj
7. KM-1100MRJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1930 (4.50) 1840 (3.82) WATER gal./24HR (gal./100 lbs.) 185 (18.0) 451 (39.0) ICE PRODUCTION PER CYCLE 16.5 lbs. -
Page 59: Km-1340Maj
8. KM-1340MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 13.2 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2180 (4.81) 2000 (3.77) WATER gal./24HR (gal./100 lbs.) 257 (23.6) -
Page 59: Km-1340Maj
8. KM-1340MAJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 13.2 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2180 (4.81) 2000 (3.77) WATER gal./24HR (gal./100 lbs.) 257 (23.6) -
Page 60: Km-1340Mwj
9. KM-1340MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 11.0 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1920 (3.60) 1820 (3.31) WATER gal./24HR (gal./100 lbs.) 228 (17.8) -
Page 60: Km-1340Mwj
9. KM-1340MWJ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 11.0 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1920 (3.60) 1820 (3.31) WATER gal./24HR (gal./100 lbs.) 228 (17.8) -
Page 61: Km-1340Mrj With Urc-14F
10. KM-1340MRJ with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 14.0 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2230 (4.54) 2070 (3.62) WATER gal./24HR (gal./100 lbs.) 206 (17.5) -
Page 61: Km-1340Mrj With Urc-14F
10. KM-1340MRJ with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 14.0 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2230 (4.54) 2070 (3.62) WATER gal./24HR (gal./100 lbs.) 206 (17.5) -
Page 62: Km-1340Mrj3 With Urc-14F
11. KM-1340MRJ3 with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2190 (4.16) 1980 (3.33) WATER gal./24HR (gal./100 lbs.) 222 (17.5) 507 (35.5) ICE PRODUCTION PER CYCLE... -
Page 62: Km-1340Mrj3 With Urc-14F
11. KM-1340MRJ3 with URC-14F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.5 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2190 (4.16) 1980 (3.33) WATER gal./24HR (gal./100 lbs.) 222 (17.5) 507 (35.5) ICE PRODUCTION PER CYCLE... -
Page 63: Km-1601Mrj With Urc-22F
12. KM-1601MRJ with URC-22F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 15.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2810 (4.35) 2560 (3.85) WATER gal./24HR (gal./100 lbs.) -
Page 63: Km-1601Mrj With Urc-22F
12. KM-1601MRJ with URC-22F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 15.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2810 (4.35) 2560 (3.85) WATER gal./24HR (gal./100 lbs.) -
Page 64: Km-1601Mrj3 With Urc-22F
13. KM-1601MRJ3 with URC-22F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2640 (4.09) 2550 (3.70) WATER gal./24HR (gal./100 lbs.) -
Page 64: Km-1601Mrj3 With Urc-22F
13. KM-1601MRJ3 with URC-22F Specification Sheet AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 12.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2640 (4.09) 2550 (3.70) WATER gal./24HR (gal./100 lbs.) -
Page 65: Wiring Diagrams
B. Wiring Diagrams 1. KM-901M_J, KM-1100M_J... -
Page 65: Wiring Diagrams
B. Wiring Diagrams 1. KM-901M_J, KM-1100M_J... -
Page 66: Km-1340M_J And Km-1601Mrj
2. KM-1340M_J and KM-1601MRJ... -
Page 66: Km-1340M_J And Km-1601Mrj
2. KM-1340M_J and KM-1601MRJ... -
Page 67: Km-1340Mrj3 And Km-1601Mrj3
3. KM-901MRJ3... -
Page 67: Km-1340Mrj3 And Km-1601Mrj3
3. KM-1340MRJ3 and KM-1601MRJ3...