Hoshizaki KM-901MRH/3 Manuel d'utilisateur

Hoshizaki“A Superior Degreeof Reliability”www.hoshizaki.comModelsKM-901MAHKM-901MWHKM-901MRH/3Modular Crescent CuberHoshizaki America, Inc.SERVICE MA

02b. KM-901MWH (water-cooled) Auxiliary Code U-1 and LaterAC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)AMPERAGE 8.7A ( 5 Min. Freeze

3a. KM-901MRH (remote air-cooled) Auxiliary Code T-0, U-0Note: We reserve the right to make changes in specications and design without prior notice

3b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and LaterAC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)AMPERAGE 11.6A ( 5 Min.

34a. KM-901MRH3 (remote air-cooled) Auxiliary Code T-0, U-0Note: We reserve the right to make changes in specications and design without prior notic

44b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and LaterAC SUPPLY VOLTAGE 208-230/60/3AMPERAGE 7.0A ( 5 Min. Freeze AT 104°F / WT 80°F)MINIMU

5B. Condenser Unit1. URC-9FUnit: mm [in.]

6 SpecicationsMODEL: URC-9FNote: We reserve the right to make changes in specications and design without prior notice.AC SUPPLY VOLTAGE 115/60/1 (C

7II. General InformationA. Construction1. KM-901MAH (air-cooled)Thermostatic Bin ControlAuxiliary Code T-0, U-0Water Supply InletCondenserDrierContro

82. KM-901MWH (water-cooled)Water Supply InletCondenserDrierControl BoxSpray TubesControl SwitchWater PumpFloat SwitchCompressorExpansion ValvesWater

93. KM-901MRH/3 (remote air-cooled)Receiver TankWater Supply InletJunction BoxesDrierControl BoxSpray TubesControl SwitchWater PumpFloat SwitchCompre

IMPORTANTOnly qualied service technicians should install, service, and maintain the icemaker. No service or maintenance should be undertaken until t

0B. Sequence of Operation1. Sequence Cycles and Shutdowna) "E" Control Board: Auxiliary Code T-0, U-0 The steps in the sequence are as outl

(5) Harvest CycleSame as the initial harvest cycle. See "II.B..a)() Initial Harvest Cycle."Note: Unit continues to cycle until TBC is sa

(3) Freeze CycleLED  is on. Comp and FMR remain energized, PM, FM, and LLV energize. HGV and WV de-energize. For the rst 5 minutes, CB will not ac

3(6) ShutdownWhen MBC is activated (MBC open), the yellow "BC OPEN" LED comes on. The unit then shuts down as outlined in the table below.C

42. Sequence Flow Charta) "E" Control Board: Auxiliary Code T-0, U-04. Pump-Out Cycle• Factory set for every 0th cycle (S4 dip switch 5 &a

5b) "G" Control Board: Auxiliary Code U-1 and Later• WV time: 6 min. or the length of harvest minus 0 or 50 sec. (S4 dip switch 7), whiche

6C. Control Board• A Hoshizaki exclusive solid-state control board is employed in KM-90MAH, KM-90MWH, and KM-90MRH/3 Modular Crescent Cubers.• All

71. Control Board Layouta) "E" Control Board: Auxiliary Code T-0, U-0"E" Control BoardPart Number A40-0 (factory); 2A1410-02

8"G" Control BoardPart Number A379-0 "G" Control Board"ALARM RESET" Button"OUTPUT TEST" Button(used to tes

92. Featuresa) Maximum Water Supply Period - 6 minutes"E" control board: The inlet water valve is open during harvest for 6 minutes or the

3IMPORTANTThis manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualied service technici

30f) LED Lights and Audible Alarm Safeties(1) "E" Control Board: Auxiliary Code T-0, U-0At startup, a 5-second delay occurs while the contro

3(2) "G" Control Board: Auxiliary Code U-1 and LaterAt startup, a 5-second delay occurs while the control board conducts an internal timer

33. Controls and AdjustmentsCAUTIONDip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty c

33c) Pump-Out Timer (S4 dip switch 3 & 4)When a pump-out is called for, the pump motor de-energizes after the preceding freeze cycle. The pump mot

34e) Bin Control Selector/Harvest Pump Timer (S4 dip switch 7)Depending on the control board, S4 dip switch 7 is either a bin control selector or harv

35g) Freeze Timer (S4 dip switch 9 & 10)CAUTIONAdjust to proper specication, or the unit may not operate correctly.The freeze timer setting deter

36D. Bin Control1. Thermostatic Bin Control: Auxiliary Code T-0, U-0CAUTIONWhen the ambient temperature is below 45°F (7°C), the thermostatic bin cont

37III. Technical InformationA. Water Circuit and Refrigeration Circuit1. KM-901MAH (air-cooled)Water SupplyCleaning ValveFloat SwitchDrainCheck ValveE

382. KM-901MWH (water-cooled)Water SupplyCleaning ValveFloat SwitchDrainCheck ValveExpansion ValvesCompressorHot Gas ValveCheck ValvesHigh Pressure Sw

393. KM-901MRH/3 (remote air-cooled)Water SupplyCleaning ValveFloat SwitchDrainCheck ValveExpansion ValvesCompressorHot Gas ValveCheck ValvesHigh Pres

43. Controls and Adjustments ... 3a) Default Dip Switch Settings ..

40B. Wiring Diagrams1. Thermostatic Bin Control: Auxiliary Code T-0, U-0a) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)*Transformer Output 0.5

4b) KM-901MRH (remote air-cooled)* High Pressure SwitchCut-out 4± PSIGCut-in 37± PSIG0*Transformer Output 0.5V at 5VThermostatic Bin Contr

4c) KM-901MRH3 (remote air-cooled)* High Pressure SwitchCut-out 4± PSIGCut-in 37± PSIG0*Transformer Output 0.5V at 5VThermostatic Bin Cont

432. Mechanical Bin Control: Auxiliary Code U-1 and Latera) KM-901MAH (air-cooled) and KM-901MWH (water-cooled)Mechanical Bin Control: Auxiliary Code

44b) KM-901MRH (remote air-cooled)* High Pressure SwitchCut-out 4± PSIGCut-in 37± PSIG0*Transformer Output 0.5V at 5VMechanical Bin Control

45c) KM-901MRH3 (remote air-cooled)Mechanical Bin Control: Auxiliary Code U- and Later*Transformer Output 0.5V at 5V* High Pressure SwitchCut-out

46C. Performance Data1. KM-901MAH (air-cooled)Note:. Pressure data is recorded at 5 minutes into freeze cycle. The data not in bold should be used fo

47Note:. Pressure data is recorded at 5 minutes into freeze cycle. The data not in bold should be used for reference only.. We reserve the right to

483. KM-901MRH (remote air-cooled)Note:. Pressure data is recorded at 5 minutes into freeze cycle. The data not in bold should be used for reference

49Note:. Pressure data is recorded at 5 minutes into freeze cycle. The data not in bold should be used for reference only.. We reserve the right to

5V. Removal and Replacement of Components ... 68A. Service for Refrigerant Lines ...

50IV. Service Diagnosis WARNING. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric

53) 1-Minute Fill Cycle – LED 4 is on. WV energizes. After  minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If close

55) Freeze Cycle – LED 1 is on. Comp and FMR remain energized, PM, LLV, and FM energize. WV and HGV de-energize. The unit is held in freeze by a 5-mi

537) Normal Harvest Cycle – same as the initial harvest cycle – See "IV.A.4) Initial Harvest Cycle." 8) Shutdowna) Thermostatic Bin Control:

543) The "OUTPUT TEST" button provides a relay sequence test. Make sure the control switch is in the "ICE" position, then press th

552. Mechanical Bin Control Check and Cleaning: Auxiliary Code U-1 and Latera) Mechanical Bin Control CheckTo check the mechanical bin control switch,

56b) Mechanical Bin Control CleaningScale may build up on the mechanical bin control. Scale can cause the actuator paddle and magnet to stick. In this

57D. Float Switch Check and Cleaning1. Float Switch CheckTo check the oat switch, follow the steps below.) Turn off the power supply.) Remove the f

582. Float Switch CleaningDepending on local water conditions, scale may build up on the oat switch. Scale on the switch can cause the oat to stick.

59E. Thermistor CheckTo check thermistor resistance, follow the steps below.) Turn off the power supply.) Remove the front panel, then move the cont

6Important Safety InformationThroughout this manual, notices appear to bring your attention to situations which could result in death, serious injury,

60F. Diagnostic Charts1. No Ice ProductionProblem Possible Cause Remedy[]The icemaker will not start.a) Power Supply . Off, blown fuse, or tripped b

6Problem Possible Cause Remedy[]The icemaker will not start. (continued)h) Transformer . Coil winding open or shorted.. Replace.i) Wiring to Contr

6Problem Possible Cause Remedy[3] Compressor will not start or stops operating.a) Magnetic Contactor . Bad contacts. . Check for continuity and rep

63Problem Possible Cause Remedy[7] Fan motor will not start, or is not operating (except water-cooled model).a) Fan Motor . Motor winding open. . Re

64Problem Possible Cause Remedy[]Freeze cycle time is too long. (continued)f) Thermistor . Disconnected, loose, or defective.. Connect, secure, che

65Problem Possible Cause Remedy[]All ice formed on evaporator does not fall into bin in harvest cycle. (continued)l) Refrigerant . Low charge. . Ch

66Problem Possible Cause Remedy[]Freeze cycle time is long. (continued)n) Control Board . Float switch connection loose (K5).. Check and reconnect.

67Problem Possible Cause Remedy[]Cloudy or irregular cubes.a) Evaporator . Frozen up. . See chart . . Scaled up. . Clean3. Damaged. 3. Replace.

68V. Removal and Replacement of Components WARNING. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk

692. Brazing WARNING. R-404A itself is not ammable at atmospheric pressure and temperatures up to 76°F (80°C).. R-404A itself is not explosive or

7I. SpecicationsA. Icemaker1a. KM-901MAH (air-cooled) Auxiliary Code T-0, U-0Note: We reserve the right to make changes in specications and design w

704) Close the low-side valve and high-side valve on the gauge manifold.5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a

78) Attach the rubber grommets of the prior compressor to the new compressor.9) Place the compressor in position and secure it using the bolts and wa

78) 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 detecto

730) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled models, see the nameplate for the required refrigerant char

74F. Removal and Replacement of Air-Cooled CondenserCAUTION. Always install a new drier every time the sealed refrigeration system is opened. . Do n

75G. Removal and Replacement of Water-Cooled CondenserCAUTION. Always install a new drier every time the sealed refrigeration system is opened. . Do

76H. Removal and Replacement of Remote Air-Cooled CondenserCAUTION. Always install a new drier every time the sealed refrigeration system is opened.

77I. Removal and Replacement of Water Regulating Valve (water-cooled model)CAUTION. Always install a new drier every time the sealed refrigeration sy

78Fig. 4Adjustment ScrewCW – HigherCCW – LowerTop View8) Check for water leaks.9) Replace the panels in their correct positions.0) Turn on the powe

798) Braze all ttings with nitrogen gas owing at a pressure of 3 to 4 PSIG.9) Use an electronic leak detector or soap bubbles to check for leaks. Ad

81b. KM-901MAH (air-cooled) Auxiliary Code U-1 and LaterAC SUPPLY VOLTAGE 208-230/60/1 (3 wire with netrual for 115V)AMPERAGE 11.4 A ( 5 Min. Freeze

800) Secure the insulation using plastic cable ties.) Connect the white thermistor connector through the bushing of the control box to the control

8) Replace the front panel in its correct position.3) Turn on the power supply.O. Removal and Replacement of Pump Motor) Turn off the power suppl

8P. Removal and Replacement of Control BoardWhen replacing a control board follow the precautions below. CAUTION. The control board is fragile; hand

83VI. Cleaning and Maintenance WARNINGCHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after any cleaning or ma

841. Cleaning Procedure) Dilute 6 . oz. (473 ml) of the recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics L

859) Turn off the power supply after 3 minutes.0) Remove the front panel and fully open the cleaning valve.) Move the control switch to the "

86B. Maintenance This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker. WARNING. O

875) Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve.6) Move the control switch to the "ICE"

92a. KM-901MWH (water-cooled) Auxiliary Code T-0, U-0Note: We reserve the right to make changes in specications and design without prior notice.AC SU