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Hoshizaki KM-420MWJ Service Manual

Modular crescent cuber
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Service Manual
Modular Crescent Cuber
Models
KM-350MAJ, MWJ
KM-420MAJ, MWJ, MRJZ
KM-520MAJ, MWJ, MRJ(Z)
KM-660MAJ, MWJ, MRJ(Z)
hoshizakiamerica.com
Number: 73230
Issued: 10-29-2018
Revised: 11-7-2023

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Summary of Contents for Hoshizaki KM-420MWJ

  • Page 1 Service Manual Modular Crescent Cuber Models KM-350MAJ, MWJ KM-420MAJ, MWJ, MRJZ KM-520MAJ, MWJ, MRJ(Z) KM-660MAJ, MWJ, MRJ(Z) hoshizakiamerica.com Number: 73230 Issued: 10-29-2018 Revised: 11-7-2023...
  • Page 2 WARNING Only qualified service technicians should install and service the appliance. To obtain the name and phone number of your local Hoshizaki Certified Service Representative, visit www.hoshizaki.com. No service should be undertaken until the technician has thoroughly read this Service Manual. Failure to service and maintain the appliance in accordance with this manual will adversely affect safety, performance, component life, and warranty coverage.

  • 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 A. Specification and Performance Data Sheets ..............74 1. KM-350MAJ ......................74 2. KM-350MWJ ......................75 3. KM-420MAJ ......................76 4. KM-420MWJ ......................77 5. KM-420MRJZ with URC-5FZ ................. 78 6. KM-520MAJ ......................79 7. KM-520MWJ ......................80 8. KM-520MRJ with URC-5F ..................81 9.

  • 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 7: Construction And Water/Refrigeration Circuit Diagrams

    I. Construction and Water/Refrigeration Circuit Diagrams A. Construction 1. Air-Cooled Models (MAJ) Drain Valve Water Supply Inlet Cleaning Valve Spray Tubes Strainer Hot Gas Valve Evaporator Condenser High-Pressure Inlet Water Valve Switch Thermostatic Expansion Valve Fan Motor Liquid Line Valve Float Switch Drier Compressor...

  • Page 8: Water-Cooled Models (Mwj)

    Bin Control Extension Bracket (ABS) Model Shown: KM-520MWJ Bin Control Auxiliary Code Break Model *Ultrasonic Bin Control Sensor **Mechanical Bin Control KM-350MWJ H-0 and later KM-420MWJ KM-520MWJ H-0 and later KM-660MWJ L00673J and earlier, L10694L and later L00674K to L00693K...

  • Page 9: Remote Models (Mrj, Mrjz )

    3. Remote Models (MRJ, MRJZ ) Thermostatic Drain Valve Expansion Valve Spray Tubes Water Supply Inlet Discharge and Liquid Cleaning Valve Line Connections (OS Quick Connector) Evaporator Discharge and Liquid Line Service Valves MRJZ Inlet Water Strainer Valve Hot Gas Valve Receiver Tank High-Pressure Switch...

  • Page 10: Water/Refrigeration Circuit Diagrams

    B. Water/Refrigeration Circuit Diagrams 1. Air-Cooled Models (MAJ)

  • Page 11: Water-Cooled Models (Mwj)

    2. Water-Cooled Models (MWJ)

  • Page 12: Remote Models (Mrj, Mrjz)

    3. Remote Models (MRJ, MRJZ)

  • Page 13: Sequence Of Operation And Service Diagnosis

    II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Charts 1. Operation Flow Chart...

  • Page 14: Shutdown Flow Chart

    2. Shutdown Flow Chart...

  • Page 15: Service Diagnosis

    B. Service Diagnosis 1. K Control Board (2A8242-02) with Ultrasonic Bin Control Used in conjunction with Ultrasonic Bin Control Board (4A6838-01) Model Auxiliary Code Break KM-350MAJ L19076J and earlier KM-350MWJ L10793J and earlier KM-520MAJ L02152J and earlier KM-520MWJ L00958J and earlier KM-520MRJ L00778J and earlier KM-660MAJ...
  • Page 16 a) Sequence and Component Diagnosis 3) Power On: Turn on the power supply, then move the control switch to the "ON" position and the mode switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED turns on and UBC control board green "LED 1" turns on. Note: •...
  • Page 17 4) 1-Min. Fill Cycle – LED 4 is on. WV energizes. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FMR energized), continue to step 5a. If FS is open, fill cycle continues until FS closes (low water safety protection during initial start up and at the end of each harvest).
  • Page 18 5b) Harvest Pump Time (Harvest Assist) – LEDs 1 and 3 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 and LED 3 turns on.
  • Page 19 b) Comp and FMR Diagnosis: If Comp and FMR de-energize once freeze begins, check that appliance has not shut off on HPS (CB "POWER OK" LED off). If so, check "3)b) HPS Diagnosis" above. If CB "POWER OK" LED is on, check for 115VAC at CB K1 #9 (Y) to neutral (W).
  • Page 20 h) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS connector. 15 sec. later appliance should switch out of the freeze cycle (15 second delay after FS opens before terminating the freeze cycle). If appliance remains in freeze longer than 15 sec.
  • Page 21 8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above. Note: Appliance continues to cycle until BC is satisfied or power is switched off. The appliance always restarts at the 1-min. fill cycle. b) Shutdown Diagnosis 1) See "II.D.1a.

  • Page 22: K Control Board (2A8242-02) With Mechanical Bin Control

    2. K Control Board (2A8242-02) with Mechanical Bin Control Model Auxiliary Code Break KM-350MAJ L19077K to L19236K KM-520MAJ L02153K to L02411K KM-660MAJ L05262K to L05441K KM-660MWJ L00674K to L00693K 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.
  • Page 23 a)Sequence and Component Diagnosis 3) Power On: Turn on the power supply, then move the control switch to the "ON" position and the mode switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED turns on. If CB yellow "BC OPEN/CLOSED" LED is on (indicating a full bin), move ice away from MBC.
  • Page 24 4) 1-Min. Fill Cycle – LED 4 is on. WV energizes. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FMR energized), continue to step 5a. If FS is open, fill cycle continues until FS closes (low water safety protection during initial start up and at the end of each harvest).
  • Page 25 5b) Harvest Pump Time (Harvest Assist) – LEDs 1 and 3 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 and LED 3 turns on.
  • Page 26 b) Comp and FMR Diagnosis: If Comp and FMR de-energize once freeze begins, check that appliance has not shut off on HPS (CB "POWER OK" LED off). If so, check "3)b) HPS Diagnosis" above. If CB "POWER OK" LED is on, check for 115VAC at CB K1 #9 (Y) to neutral (W).
  • Page 27 h) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS connector. 15 sec. later appliance should switch out of the freeze cycle (15 second delay after FS opens before terminating the freeze cycle). If appliance remains in freeze longer than 15 sec.
  • Page 28 8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above. Note: Appliance continues to cycle until BC is satisfied or power is switched off. The appliance always restarts at the 1-min. fill cycle. 2. Shutdown Diagnosis 1) See "II.D.2a.

  • Page 29: K+ Control Board (2A9678-01) With Ultrasonic Bin Control

    3. K+ Control Board (2A9678-01) with Ultrasonic Bin Control Model Auxiliary Code Break KM-350MAJ L19237K and later KM-350MWJ L20794L and later KM-420M_J(Z) KM-520MAJ L02412K and later KM-520MWJ L10989L and later KM-520MRJZ KM-660MAJ L15442L and later KM-660MWJ L10694L and later KM-660MRJZ WARNING •...
  • Page 30 a) Sequence and Component Diagnosis 3) Power On: Turn on the power supply, then move the control switch to the "ON" position and the mode switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED turns on. If CB yellow "BC OPEN/CLOSED" LED is on, see "II.D.1a.
  • Page 31 4) 1-Min. Fill Cycle – WV LED is on. WV energizes. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGV, FMR energized), continue to step 5a. If FS is open, fill cycle continues until FS closes (low water safety protection during initial start up and at the end of each harvest).
  • Page 32 5b) Harvest Pump Time (Harvest Assist) – Comp, PM, and FM/HGV LEDs 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).
  • Page 33 b) Comp and FMR Diagnosis: If Comp and FMR de-energize once freeze begins, check that appliance has not shut off on HPS (CB "POWER OK" LED off). If so, check "3)b) HPS Diagnosis" above. If CB "POWER OK" LED is on, check for 115VAC at CB K1 #9 (Y) to neutral (W).
  • Page 34 h) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS connector. 15 sec. later appliance should switch out of the freeze cycle (15 second delay after FS opens before terminating the freeze cycle). If appliance remains in freeze longer than 15 sec.
  • Page 35 8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above. Note: Appliance continues to cycle until BC is satisfied or power is switched off. The appliance always restarts at the 1-min. fill cycle. b) Shutdown Diagnosis 1) See "II.D.1a.

  • Page 36: Control Board Check

    C. 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 37 Following the output test cycle, the icemaker begins normal icemaking operation at the 1-minute fill cycle. If the LEDs do not light as described above, replace CB. IMPORTANT! Do not press the "OUTPUT TEST" button while CB is in alarm. See Fig.

  • Page 38: Bin Control Check, Adjustment, And Cleaning

    Note: It is strongly advised to keep a known "good" UBC sensor on your truck, for troubleshooting assistance. The ultrasonic bin control is factory set for use on Hoshizaki America standard ice storage bins. If mounted on a dispenser application or if a change to the ice level in an ice storage bin application is desired, see "II.D.1b.
  • Page 39 4a) K Control Board (2A8242-02) - UBC control board green "LED 1" LED is on and CB yellow "BC OPEN/CLOSED" LED is off. a) Bin Empty Diagnosis: If fill cycle does not start, confirm UBC control board green "LED 1" LED is on. If not, with UBC wire harness connected to CB K4 connector, ALARM RESET OUTPUT TEST check for 5VDC at CB K4 pin #3 (W) to CB K4 pin #2 (BK).
  • Page 40 Cycle at Bin Control Activation Control Board Shutdown Fill Cycle 15 sec. after activation. Harvest Cycle If engaged 15 sec. or longer, at the end of harvest cycle. Freeze Cycle 15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle protection timer terminates.
  • Page 41 • Failure to properly adjust the bin control setting could result in water leakage, ice backup, and icemaker damage. The bin control is factory set to 1 for use on Hoshizaki America standard ice storage bins. See the table below for adjustments to ice level.
  • Page 42 2a. Mechanical Bin Control Check - (2A8598G01) Model Auxiliary Code Break KM-350MAJ L19077K to L19236K KM-520MAJ L02153K to L02411K KM-660MAJ L05262K to L05441K KM-660MWJ L00674K to L00693K This appliance uses a lever-actuated proximity switch to control the ice level in the storage bin.
  • Page 43 4) Disconnect BC connector from CB K4 connector, then remove BC from the icemaker. 5) Remove the actuator paddle from the switch mount. See Fig. 10. 6) Wipe down BC with a mixture of 1 part of Hoshizaki "Scale Away" and 25 parts of warm water. Rinse the parts thoroughly with clean water.

  • Page 44: Float Switch Check And Cleaning

    E. 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 45 6) Wipe down the float switch bracket assembly, stem, and float with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Rinse the parts thoroughly with clean water. WARNING! Do not remove the lock nut on the float switch assembly. This is factory sealed and must not be removed.

  • Page 46: Thermistor Check

    F. 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, then remove the top and right side panels. 3) Remove the thermistor from the refrigerant tubing. 4) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 min.

  • Page 47: 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. Fuse (Control Box) a) Blown. 3. Control Switch a) In "OFF" or "PUMP" position. b) Defective.
  • Page 48 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 49 Freeze-Up - Possible Cause 10. Thermistor a) Loose, disconnected, or defective. See "II.F. Thermistor Check" 11. Thermostatic Expansion Valve a) Defective. 12. Hot Gas Valve a) Defective. 13. Liquid Line Valve a) Defective. Freeze Cycle 1. Evaporator a) Scaled up. b) Damaged.
  • Page 50 Low Ice Production - Possible Cause Long Freeze Cycle 1. Evaporator a) Scaled up, dirty. 2. Float Switch a) Scaled up, dirty. See "II.E. Float Switch Check b) Float sticking. and Cleaning" c) Defective switch. 3. Inlet Water Valve a) Leaking by. 4.

  • Page 51: 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 52: 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 53: Control Board Layout

    A. Control Board Layout 1. K Control Board (2A8242-02) K Control Board • "OUTPUT TEST" Button (black or blue) • S4 Dip Switch • "ALARM RESET" Button (white) (used to test relays on control board) • K3 (white) Connector • Bin Control Switch (5VDC) BC OPEN/CLOSED Thermistor...

  • Page 54: K+ Control Board (2A9678-01)

    2. K+ Control Board (2A9678-01) K+ Control Board • Ultrasonic Bin Control • "ALARM RESET" Button (white) Distance Adjustment • S4 Dip Switch • S5 Dip Switch • "OUTPUT TEST" • K12 (white) Connector (5VDC) Button Ultrasonic Bin Control (used to test relays on control board) •...

  • Page 55: Led Lights And Audible Alarm Safeties

    B. LED Lights and Audible Alarm Safeties 1. K Control Board (2A8242-02) Beep occurs and red CB "POWER OK" LED turns on when control switch is moved to "ICE" position. Sequence Green LEDs 1 through 5 turn on and sequence from initial startup as listed in the table below.

  • Page 56: K+ Control Board (2A9678-01)

    2. K+ Control Board (2A9678-01) Beep occurs and red CB "POWER OK" LED turns on when control switch is moved to "ICE" position. Sequence Green LEDs turn on and sequence from initial startup as listed in the table below. Order of green LEDs from the outer edge of control board is Comp, CV, WV, DV, PM, FM/HGV.

  • Page 57: Settings And Adjustments

    S4 Dip Switch No. KM-350MAJ, KM-350MWJ OFF OFF OFF ON ON OFF ON OFF ON ON KM-420MAJ, KM-420MWJ, KM-420MRJZ OFF OFF OFF OFF OFF OFF ON OFF ON ON KM-520MAJ, KM-520MWJ, KM-520MRJ(Z) OFF OFF OFF OFF OFF OFF ON OFF ON ON...

  • Page 58: Harvest Time (S4 Dip Switch 1 & 2)

    2. Harvest Time (S4 dip switch 1 & 2) The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest timer is factory set, and generally no adjustment is required. However, a setting longer than the factory setting may be advised in cases where the drain provided at harvest needs to be prolonged for extra cleaning.

  • Page 59: 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 60: Harvest Pump Time (Harvest Assist (S4 Dip Switch 7)

    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 61: Float Switch Selector (S5 Dip Switch 1)

    9. Float Switch Selector (S5 dip switch 1) NOTICE Do not adjust. This must be left in the factory default position or the icemaker will not operate correctly. This dip switch setting allows use of this control board in single and dual float switch models.

  • Page 62: Anti-Slush (S5 Dip Switch 5)

    12. Anti-Slush (S5 dip switch 5) This dip switch setting provides anti-slush control during the freeze cycle. When the evaporator temperature reaches 36°F (2.2°C) the control board reads a 5.8 kΩ signal from the thermistor and de-energizes the water pump for 10 sec. to melt the ice slush and prevent the ice slush from blocking the water supply tubing, causing irregular freeze patterns.

  • Page 63: 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 64 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 65 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 66: Refrigeration Circuit Service Information

    B. Refrigeration Circuit Service Information MRJZ models with URC-5FZ WARNING • Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA-certified service personnel. • 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 67 Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the nameplate on the condensing unit or the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.
  • Page 68 6) A liquid charge is required when charging an R-404A system (to prevent fractionation). Place the service cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the service cylinder, then place it on the scales. Open the high-side valve on the gauge manifold.

  • Page 69: 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 70: 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 71: 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 "PUMP"...
  • Page 72 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 73: 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 74: Technical Information

    VIII. 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.

  • Page 75: Km-350Mwj

    2. KM-350MWJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 7.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 780 (4.90) 770 (4.47) WATER gal./24HR (gal./100 lbs.)

  • Page 76: Km-420Maj

    3. KM-420MAJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 10.6 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.) 970(5.30) 860(4.05) WATER gal./24HR (gal./100 lbs.)

  • Page 77: Km-420Mwj

    4. KM-420MWJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 8.45 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.) 850(4.70)

  • Page 78: Km-420Mrjz With Urc-5Fz

    5. KM-420MRJZ with URC-5FZ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 F ° ° 0 MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 960(5.00) 890(4.12) WATER gal./24HR (gal./100 lbs.) 74(16.0) 158(30.3) ICE PRODUCTION PER CYCLE...

  • Page 79: Km-520Maj

    6. KM-520MAJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 10.6 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.) 940 (4.68) 840 (3.64) WATER gal./24HR (gal./100 lbs.)

  • Page 80: Km-520Mwj

    7. KM-520MWJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 8.45 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.) 860 (4.65) 880 (4.45) WATER gal./24HR (gal./100 lbs.)

  • Page 81: Km-520Mrj With Urc-5F

    8. KM-520MRJ with URC-5F Specification Sheet AC SUPPLY VOLTAGE 115/60/1 F ° ° 0 MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 990 (4.80) 920 (4.05) WATER gal./24HR (gal./100 lbs.) 67 (13.6) 173 (31.6) ICE PRODUCTION PER CYCLE...

  • Page 82: Km-520Mrjz With Urc-5Fz

    9. KM-520MRJZ with URC-5FZ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 F ° ° 0 MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 990(4.80) 920(4.05) WATER gal./24HR (gal./100 lbs.) 67(13.6) 173(31.6) ICE PRODUCTION PER CYCLE...

  • Page 83: Km-660Maj

    10. KM-660MAJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 15.2 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.) 1320 (5.12) 1200 (4.34) WATER gal./24HR (gal./100 lbs.)

  • Page 84: Km-660Mwj

    11. KM-660MWJ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 12.35 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.) 1190 (4.28) 1130 (4.07) WATER gal./24HR (gal./100 lbs.)

  • Page 85: Km-660Mrj With Urc-5F

    12. KM-660MRJ with URC-5F Specification Sheet AC SUPPLY VOLTAGE 115/60/1 AMPERAGE 16.1 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.) 1400 (5.60) 1270 (4.72) WATER gal./24HR (gal./100 lbs.)

  • Page 86: Km-660Mrjz With Urc-5Fz

    13. KM-660MRJZ with URC-5FZ Specification Sheet AC SUPPLY VOLTAGE 115/60/1 F ° ° 0 MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 1250(5.25) 1160(4.34) WATER gal./24HR (gal./100 lbs.) 86(15.0) 181(28.2) ICE PRODUCTION PER CYCLE 10.4 lbs.

  • Page 87: Wiring Diagrams

    B. Wiring Diagrams 1. K Control Board (2A8242-02) with Ultrasonic Bin Control Ultrasonic Bin Control Board (4A6838-01)

  • Page 88: K Control Board (2A8242-02) With Mechanical Bin Control

    2. K Control Board (2A8242-02) with Mechanical Bin Control...

  • Page 89: K+ Control Board (2A9678-01) With Ultrasonic Bin Control

    3. K+ Control Board (2A9678-01) with Ultrasonic Bin Control...

This manual is also suitable for:

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