Download
Share
Print this page
Hoshizaki KM-901MAJ Service Manual
  1. Manuals
  2. Brands
  3. Hoshizaki Manuals
  4. Commercial Food Equipment
  5. KM-901MAJ
  6. Service manual
Hoshizaki KM-901MAJ Service Manual

Hoshizaki KM-901MAJ Service Manual

Modular crescent cuber
Hide thumbs Also See for KM-901MAJ:

Advertisement

Quick Links

Download this manual
Service Manual
Modular Crescent Cuber
Models
KM-901MAJ, MWJ, MRJ(Z)/3
KM-1100MAJ, MWJ, MRJ(Z)
KM-1340MAJ, MWJ, MRJ(Z)/3
KM-1601MRJ(Z)/3
hoshizakiamerica.com
Number: 73213
Issued: 1-30-2018
Revised: 4-8-2025

Advertisement

loading
Need help?

Need help?

Do you have a question about the KM-901MAJ and is the answer not in the manual?

Questions and answers

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(Z)/3 KM-1100MAJ, MWJ, MRJ(Z) KM-1340MAJ, MWJ, MRJ(Z)/3 KM-1601MRJ(Z)/3 hoshizakiamerica.com Number: 73213 Issued: 1-30-2018 Revised: 4-8-2025...
  • 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 E-mail: tech-support@hoshizaki.com...
  • Page 3 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 ............86 VII. Disposal ......................... 88 VIII. Technical Information ....................89 A. Specification and Performance Data Sheets ............... 89 1. KM-901MAJ ......................89 2. KM-901MWJ ......................90 3. KM-901MRJ(Z) with URC-14F(Z) ................91 4. KM-901MRJ(Z)3 with URC-14F(Z) ................ 92 5.
  • Page 5 B. Wiring Diagrams ....................... 102 1. Auxilary Code: P-2 and Earlier ................102 a) KM-901M_J(Z), KM-1100M_J(Z) ..............102 b) KM-901M_J(Z), KM-1100M_J(Z) ..............103 c) KM-901MRJ(Z)3 ..................... 104 d) KM-901MRJ(Z)3..................... 105 2. Auxiliary Code: N-3 and Earlier ................106 a) KM-1340M_J(Z) and KM-1601MRJ(Z) ............106 b) KM-1340M_J(Z) and KM-1601MRJ(Z) ............
  • Page 6 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 7 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 8 **Reference for pages 23, 27, and 44-46. These models and Serial Number Breaks use the control board 2A9678-02 (Freeze-Up Detection) and deviate from the Auxiliary Codes listed: **Control Board 2A9678-02 Auxiliary Code Break Model KM-1340MAJ P12321E - P12360F KM-1340MWJ P10461E - P0480E KM-1340MRJZ P11300E - P11359F KM-1601MRJZ...
  • Page 9 I. Construction and Water/Refrigeration Circuit Diagram A. Construction 1a. Air-Cooled Models (MAJ) Auxiliary Code: P-2 and Earlier (KM-901MAJ, KM-1100MAJ) Auxiliary Code: N-3 and Earlier (KM-1340MAJ) Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Thermostatic Expansion Valve Cleaning Valve...
  • Page 10 1b. Air-Cooled Models (MAJ) Auxiliary Code: P-3 and Later (KM-901MAJ, KM-1100MAJ) Auxiliary Code: P-0 and Later (KM-1340MAJ) Cleaning Valve Spray Tubes Hot Gas Valve Water Supply Inlet Thermostatic Expansion Valve Fan Motor Inlet Water Valve Control Box Mode Switch Control Switch...
  • Page 11 2a. Water-Cooled Models (MWJ) Auxiliary Code: P-2 and Earlier (KM-901MWJ, KM-1100MWJ) Auxiliary Code: N-3 and Earlier (KM-1340MWJ) 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...
  • Page 12 2b. Water-Cooled Models (MWJ) Auxiliary Code: P-3 and Later (KM-901MWJ, KM-1100MWJ) Auxiliary Code: P-0 and Later (KM-1340MWJ) Cleaning Valve Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Control Box Water Regulating Valve Thermostatic Mode Switch Expansion Valve Control Switch Condenser Float Switch...
  • Page 13 3a. Remote Models (MRJ(Z)/3) Auxiliary Code: P-2 and Earlier (KM-901MRJ(Z)/3, KM-1100MRJ(Z)) Auxiliary Code: N-3 and Earlier (KM-1340MRJ(Z)/3, KM-1601MRJ(Z)/3)) Hot Gas Valve Spray Tubes Water Supply Inlet Inlet Water Valve Cleaning Valve Junction Boxes Liquid Line OS-Quick Control Switch Thermostatic Expansion Valves Discharge OS-Quick Control Box...
  • Page 14 3b. Remote Models (MRJZ/3) Auxiliary Code: P-3 and Later (KM-901MRJZ/3, KM-1100MRJZ) Auxiliary Code: P-0 and Later (KM-1340MRJZ/3, KM-1601MRJZ/3) Cleaning Valve Spray Tubes Hot Gas Valve Water Supply Inlet Inlet Water Valve Junction Boxes Control Box Liquid Line Service Valve Control Switch Thermostatic Expansion Valves Mode Switch...
  • Page 15 B. Water/Refrigeration Circuit Diagram 1a. Air-Cooled Models (MAJ) Auxiliary Code: P-2 and Earlier (KM-901MAJ, KM-1100MAJ) Auxiliary Code: N-3 and Earlier (KM-1340MAJ) Spray Tubes Condenser Inlet Water Valve Drier High-Pressure Evaporator Water Supply Switch Liquid Line Valve Heat Thermistor Exchanger Suction Line...
  • Page 16 1b. Air-Cooled Models (MAJ) Auxiliary Code: P-3 and Later (KM-901MAJ, KM-1100MAJ) Auxiliary Code: P-0 and Later (KM-1340MAJ)
  • Page 17 2a. Water-Cooled Models (MWJ) Auxiliary Code: P-2 and Earlier (KM-901MWJ, KM-1100MWJ) Auxiliary Code: N-3 and Earlier (KM-1340MWJ) 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...
  • Page 18 2b. Water-Cooled Models (MWJ) Auxiliary Code: P-3 and Later (KM-901MWJ, KM-1100MWJ) Auxiliary Code: P-0 and Later (KM-1340MWJ)
  • Page 19 3a. Remote Models (MRJ(Z)/3) Auxiliary Code: P-2 and Earlier (KM-901MRJ(Z)/3, KM-1100MRJ(Z)) Auxiliary Code: N-3 and Earlier (KM-1340MRJ(Z)/3, KM-1601MRJ(Z)/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...
  • Page 20 3b. Remote Models (MRJZ/3) Auxiliary Code: P-3 and Later (KM-901MRJZ/3, KM-1100MRJZ) Auxiliary Code: P-0 and Later (KM-1340MRJZ/3, KM-1601MRJZ/3)
  • Page 21 II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flow Chart 1a. Operation Flow Chart Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3)
  • Page 22 1b. Operation Flow Chart Auxiliary Code: P-3 (KM-901M_J(Z)/3, KM-1100) Auxiliary Code: P-0 (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3)
  • Page 23 1b. Operation Flow Chart with Freeze-Up Detection Auxiliary Code: P-4 and Later (KM-901M_J(Z)/3, KM-1100) Auxiliary Code: P-4 and Later (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3)**...
  • Page 24 2a. Shutdown Flow Chart Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3)
  • Page 25 2b. Shutdown Flow Chart Auxiliary Code: P-3 and Later (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: P-0 and Later (KM-1340M_J(Z)/3, KM-1601MRJZ/3)
  • Page 26 3. Freeze-Time Correction Chart - Control Board 2A7664-02 Only...
  • Page 27 4. Freeze-Up Detection (FUD) Flow Chart (Control Board 2A9678-02) Auxiliary Code: P-4 and Later...
  • Page 28 B. Service Diagnosis 1. Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3) 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 29 a) 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 30 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 31 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 32 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 33 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 34 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 35 c) Freeze-Time Correction Cycle (90 min.) (Control Board 2A7664-02 Only) 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 36 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 37 2. Auxiliary Code: P-3 and Later (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: P-0 and Later (KM-1340M_J(Z)/3, KM-1601MRJZ/3) 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 38 a) 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" LED and green "BIN CLS" LED turn on. If orange "BIN CLS" LED is on (indicating a full bin), check BC. Move ice away from BC actuator paddle.
  • Page 39 5a) Initial Harvest Cycle – Comp, WV, and FM/HGV LEDs are on. WV continues. Comp and HGV energize. CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ...
  • Page 40 5b) Harvest Pump Time (Harvest Assist) – Comp, PM, and WV/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 41 b) Comp, and FMR Diagnosis: If Comp. FM, and FMR de-energize once freeze begins, check that appliance has not shut off on HPS ("POWER" LED off). If so, check "3)b) HPS Diagnosis" above. If "POWER" LED is on, check for 115VAC at CB K1 #1 (V) or #9 (V) to neutral (W).
  • Page 42 g) WRV Diagnosis: WRV is factory set and generally no adjustment is required. If WRV fails to open in freeze, check for proper refrigerant pressures. See "VIII.A. Specification and Performance Data." If refrigerant pressures are correct and WRV does not open, adjust or replace as needed. See "IV.C. Water Regulating Valve Adjustment (water-cooled models)."...
  • Page 43 Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), after 5 min. of freeze disconnect CB black K5 connector (FS connector). Check that PM stops and re-starts. Next, check that PM and DV energized (water flowing down the drain through DV). If PM does not stop and re-start, check that CB Comp, PM, and DV LEDs are on.
  • Page 44 C. Freeze Up Detection Cycle (Control Board 2A9678-02) Auxiliary Code: P-4 and Later The freeze-up detection cycle (FUD) is enabled when the CB S5 DIP Switch 4 is in the "OFF" position. FUD monitoring starts in the 2nd freeze cycle after startup, 2nd freeze cycle after a bin control restart, 1st freeze cycle after a Modified Harvest, and every freeze cycle thereafter until the FUD cycle resets.
  • Page 45 2) FUD Cycle Modified Harvest – LEDs Comp, PM, WV, FM/HGV, are on and "POWER" LED Starts Blinking: A FUD modified harvest cycle is similar to a normal harvest cycle, with the following differences: • 20-sec. PM: PM LED on and PM energized for the first 20 seconds of the FUD cycle modified harvest.
  • Page 46 c) Harvest Pump Time (Harvest Assist): CB red "POWER" LED blinking. CB LEDs Comp, PM, and FM/HGV are on and Comp, FM/FMR, HGV, and PM remain energized. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest pump timer. When WV de-energizes, WV LED turns off and PM LED turns on.
  • Page 47 D. Control Board Check 1. Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3) 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.
  • Page 48 2. Auxiliary Code: P-3 and Later (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: P-0 and Later (KM-1340M_J(Z)/3, KM-1601MRJZ/3) 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.
  • Page 49 4) To verify voltage output from CB to the components, slide the CB K1 connector out far enough to allow multimeter lead contact. With the icemaker in the cycle to be tested, check output voltage from the corresponding pin on CB K1 connector to a neutral (W) wire.
  • Page 50 E. Bin Control Check and Cleaning 1. Thermostatic 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.
  • Page 51 2. Mechanical Bin Control Check This appliance uses a lever-actuated proximity switch to control the ice level in the storage bin. No adjustment is required. To check BC, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel, then move the control switch to the "OFF" position. 3) Remove the control box cover, then clear any ice away from BC.
  • Page 52 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. 4. 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 53 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.E.5.
  • Page 54 4) Bin Empty Diagnosis: As water begins to fill the water tank (1-min. fill), place an object 5" to 7" (127 to 178 mm) away from the UBC lens. See Fig. 3. CB 5-sec. delay timer starts. "BIN CLS" LED turns on. CB 5-sec. delay timer terminates, CB 15-sec. delay timer starts.
  • Page 55 • Failure to properly adjust the bin control setting could result in water leakage, ice backup, and icemaker damage. The ultrasonic 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 56 For Standard Ice Storage Bins, Hoshizaki DB and DM Dispenser Units, and Coca-Cola Freestyle Dispenser Units ® Application Bin Control Ice Level Settings Shutdown Distance From Bin Control Lens Bin Control Setting (Restart is 4 in. (102 mm) below shutdown distance) Standard Ice Storage Bins 304 mm (12")
  • Page 57 For Non-Hoshizaki Dispenser Units Bin Control Ice Level Settings Shutdown Distance From Bin Control Lens Bin Control Setting (Restart is 4 in. (102 mm) below shutdown distance) 304 mm (12") (Factory Default) Do not adjust dispensers to this setting. 335 mm (13") 416 mm (16 3/8")
  • Page 58 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 59 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 60 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 61 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 62 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 63 Freeze-Up - Possible Cause 7. Refrigerant Charge a) Low. 8. Control Board a) Harvest timer (S4 dip switch 1 & 2) set too short. See "III.C. Settings and b) Harvest pump timer (S4 dip switch 7) not in factory default position. Adjustments"...
  • Page 64 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 65 J. Freeze-Up Check List 1. Thermostatic Bin Control 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__________________________.
  • Page 66 2. Mechanical Bin Control 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______________Fail Date___________ List model and manufacture of bin or dispenser__________________________. Date appliance was last cleaned:__________.
  • Page 67 3. Ultrasonic Bin Control 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 68 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 69 A. Control Board Layout 1. Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3) • 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 70 2. Auxiliary Code: P-3 and Later (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: P-0 and Later(KM-1340M_J(Z)/3, KM-1601MRJZ/3) • Ultrasonic Bin Control • "ALARM RESET" Button (white) Distance Adjustment • S4 Dip Switch • S5 Dip Switch • K12 (white) Connector (5VDC) • "OUTPUT TEST" Ultrasonic Bin Control Button (black) (used to test relays on...
  • Page 71 B. LED Lights and Audible Alarm Safeties 1. Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3) 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 72 2. Auxiliary Code: P-3 and Later (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: P-0 and Later (KM-1340M_J(Z)/3, KM-1601MRJZ/3) Beep occurs and red CB "POWER" 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 73 OFF OFF OFF OFF OFF OFF ON OFF OFF OFF KM-1601MRJ(Z)3 S5 Dip Switch (Do Not Adjust) "J" Control Board Dip Switch No. KM-901MAJ, MWJ, MRJ(Z)/3 OFF OFF OFF OFF OFF KM-1100MAJ, MWJ, MRJ(Z) KM-1340MAJ, MWJ, MRJ(Z)/3 OFF OFF OFF OFF ON...
  • Page 74 Auxiliary Code: P-0 and Later (KM-1340M_J(Z)/3, KM-1601MRJZ/3) The dip switches are factory-adjusted to the following positions for the 2A9678-01 and 2A9678-02 control boards: S4 Dip Switch No. KM-901MAJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF KM-1100M_J(Z) KM-901MWJ...
  • Page 75 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 76 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 77 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. Auxiliary Code: P-2 and Earlier (KM-901M_J(Z)/3, KM-1100M_J(Z)) Auxiliary Code: N-3 and Earlier (KM-1340M_J(Z)/3, KM-1601MRJ(Z)/3) a) Harvest Pump Time (Harvest Assist) Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized...
  • Page 78 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 79 9. Pump-Out Pump Motor Selector (S5 dip switch 1) This dip switch setting allows use of this control board to control pump motor during pump-out mode. NOTICE Do not adjust. This must be left in the factory default position for normal pump-out operation.
  • Page 80 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 5.8kΩ signal from the thermistor and de-energizes the water pump for 10 sec. to melt ice slush and prevent ice slush from blocking the water supply tubing, causing irregular freeze patterns.
  • Page 81 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 82 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 83 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 84 • 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 85 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 86 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 87 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 88 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 89 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 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER KM-901MAJ Specification Sheet AC SUPPLY VOLTAGE...
  • Page 90 2. KM-901MWJ ISSUED: 1/31/2018 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER REVISED: KM-901MWJ REVISION: Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 ( 3 WIRE WITH NEUTRAL FOR 115V) AMPERAGE 10.0 A MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F...
  • Page 91 3. KM-901MRJ(Z) with URC-14F(Z) 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 92 4. KM-901MRJ(Z)3 with URC-14F(Z) ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-901MRJZ3 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)
  • Page 93 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 94 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 95 7. KM-1100MRJ(Z) with URC-14F(Z) 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 96 8. KM-1340MAJ ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: 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...
  • Page 97 9. KM-1340MWJ ISSUED: 1/31/2018 ITEM: HOSHIZAKI MODULAR CRESCENT CUBER REVISED: MODEL: KM-1340MWJ REVISION: 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...
  • Page 98 10. KM-1340MRJ(Z) with URC-14F(Z) KM-1340MRJZ 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 CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2230 (4.54) 2070 (3.62) WATER gal./24HR (gal./100 lbs.)
  • Page 99 11. KM-1340MRJ(Z)3 with URC-14F(Z) ISSUED: 1/31/2018 REVISED: ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-1340MRJZ3 REVISION: 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.)
  • Page 100 12. KM-1601MRJ(Z) with URC-22F(Z) ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-1601MRJZ Specification Sheet AC SUPPLY VOLTAGE 208-230/60/1 AMPERAGE 15.9 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.) 2810 (4.35)
  • Page 101 13. KM-1601MRJ(Z)3 with URC-22F(Z) ITEM: HOSHIZAKI MODULAR CRESCENT CUBER MODEL: KM-1601MRJZ3 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...
  • Page 102 B. Wiring Diagrams 1. Auxilary Code: P-2 and Earlier a) KM-901M_J(Z), KM-1100M_J(Z) Thermostatic Bin Control...
  • Page 103 b) KM-901M_J(Z), KM-1100M_J(Z) Mechanical Bin Control...
  • Page 104 c) KM-901MRJ(Z)3 Thermostatic Bin Control...
  • Page 105 d) KM-901MRJ(Z)3 Mechanical Bin Control...
  • Page 106 2. Auxiliary Code: N-3 and Earlier a) KM-1340M_J(Z) and KM-1601MRJ(Z) Thermostatic Bin Control...
  • Page 107 b) KM-1340M_J(Z) and KM-1601MRJ(Z) Mechanical Bin Control...
  • Page 108 c) KM-1340MRJ(Z)3 and KM-1601MRJ(Z)3 Thermostatic Bin Control...
  • Page 109 d) KM-1340MRJ(Z)3 and KM-1601MRJ(Z)3 Mechanical Bin Control...
  • Page 110 3. Auxilary Code: P-3 and Later a) KM-901M_J(Z) Ultrasonic Bin Control...
  • Page 111 b) KM-1100M_J(Z) Ultrasonic Bin Control...
  • Page 112 c) KM-901MRJZ3 Ultrasonic Bin Control...
  • Page 113 4. Auxilary Code: P-0 and Later a) KM-1340M_J(Z) and KM-1601MRJZ Ultrasonic Bin Control...
  • Page 114 b) KM-1340MRJZ3 and KM-1601MRJZ3 Ultrasonic Bin Control...

This manual is also suitable for:

Km-901mwjKm-901mrj3Km-901mrjz3Km-1100majKm-1100mwjKm-1100mrj ... Show all