Hoshizaki KM-901MRH/3, KM-901MWH, KM-901MAH guide

4b. KM-901MRH (remote air-cooled) Auxiliary Code U-1 and Later

AC SUPPLY VOLTAGE	208-230/60/3
AMPERAGE	7.0A ( 5 Min. Freeze AT 104°F / WT 80°F)
MINIMUM CIRCUIT AMPACITY	20 A
MAXIMUM FUSE SIZE	20 A
APPROXIMATE ICE PRODUCTION	Ambient	WATER TEMP. (°F)
PER 24 HR.	Temp.(°F)	50		70		90
lbs./day ( kg/day )	70	*899 (408)		874 (397)		817 (371)
Reference without *marks	80	880 (399)		842 (382)		772 (350)
	90	874 (397)		*815 (370)		749 (340)
SHAPE OF ICE	100	855 (388)		800 (363)		689 (313)
SHAPE OF ICE	Crescent Cube
ICE PRODUCTION PER CYCLE	14.2 lbs. (6.4 kg) 720pcs.
APPROXIMATE STORAGE CAPACITY	N/A
ELECTRIC & WATER CONSUMPTION	90/70°F			70/50°F
ELECTRIC W (kWH/100 lbs.)	1830(5.4)			1670(4.5)
WATER gal./24HR (gal./100 lbs.)	147(18.0)			254(28.2)
EXTERIOR DIMENSIONS (WxDxH)	30" x 27-3/8" x 37-7/16" (762 x 695 x 950 mm)
EXTERIOR FINISH	Stainless Steel, Galvanized Steel (Rear)
WEIGHT	Net 198 lbs. (90 kg), Shipping			258 lbs. (117 kg)
CONNECTIONS - ELECTRIC	Permanent - Connection
- WATER SUPPLY	Inlet	1/2" FPT
- DRAIN	Outlet	3/4" FPT
		3/8" OD Tube
CUBE CONTROL SYSTEM	Float Switch
HARVESTING CONTROL SYSTEM	Hot Gas and Water, Thermistor and Timer
ICE MAKING WATER CONTROL	Timer Controlled. Overflow Pipe
COOLING WATER CONTROL	N/A
BIN CONTROL SYSTEM	Mechanical Switch
COMPRESSOR	Hermetic, Model CS12K6E-TF5-279
CONDENSER	Air-Cooled Remote, Condenser Unit URC-9F
EVAPORATOR	Vertical type, Stainless Steel and Copper
REFRIGERANT CONTROL	Thermostatic Expansion Valve
	Condensing Pressure Regulator on URC-9F
REFRIGERANT CHARGE	R404A, 9 lbs. 4 oz. (4200g)
	(Icemaker 5 lbs. 5 oz. Cond. Unit 3 lbs. 15 oz.)
DESIGN PRESSURE	High 467PSIG, Low 230PSIG
P.C. BOARD CIRCUIT PROTECTION	High Voltage Cut-out ( Internal )
COMPRESSOR PROTECTION	Auto-reset Overload Protector ( Internal )
REFRIGERANT CIRCUIT PROTECTION	Auto-reset High Pressure Control Switch
LOW WATER PROTECTION	Float Switch
ACCESSORIES -SUPPLIED	N/A
-REQUIRED	Ice Storage Bin, Remote Condenser Unit
OPERATING CONDITIONS	VOLTAGE RANGE					187 - 253 V
	AMBIENT TEMP.					45 -100° F
	WATER SUPPLY TEMP.					45 - 90° F
	WATER SUPPLY PRESSURE				10 - 113 PSIG

Note: We reserve the right to make changes in specifications and design without prior notice.

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Hoshizaki KM-901MRH/3, KM-901MWH, KM-901MAH service manual 4b. KM-901MRH remote air-cooled Auxiliary Code U-1 and Later

Contents

KM-901MAH KM-901MWH Hoshizaki AMERICA, INC Contents Page Page Indicates important information about the use and care Important Safety InformationSerious injury Unit Specifications Icemaker 1a. KM-901MAH air-cooled Auxiliary Code T-0, U-0 1b. KM-901MAH air-cooled Auxiliary Code U-1 and Later 2a. KM-901MWH water-cooled Auxiliary Code T-0, U-0 Water Cooled Condenser 2b. KM-901MWH water-cooled Auxiliary Code U-1 and Later 3a. KM-901MRH remote air-cooled Auxiliary Code T-0, U-0 3b. KM-901MRH remote air-cooled Auxiliary Code U-1 and Later 4a. KM-901MRH3 remote air-cooled Auxiliary Code T-0, U-0 4b. KM-901MRH remote air-cooled Auxiliary Code U-1 and Later Condenser Unit Specifications Model URC-9F II. General Information Construction KM-901MAH air-cooled KM-901MWH water-cooled KM-901MRH/3 remote air-cooled Control Board Auxiliary Code T-0, U-0 Sequence of OperationSequence Cycles and Shutdown Shutdown Control Board Auxiliary Code U-1 and Later OFF Cycle at Shutdown Mechanical Bin Control Activation Cycle Control Board Sequence Flow ChartSequence Flow Chart Bin Full Minute Harvest Cycle Freeze Cycle Pump-Out Cycle Control Board Auxiliary Code U-1Later Fill Cycle Control Board Control Board Layout Control Board Part Number 2A3792-01 Low Water Safety Harvest Backup Timer and Freeze TimerHigh Temperature Safety Maximum Water Supply Period 6 minutes Sequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Energized Time LEDs are On Components Min Max Avg Control Board Auxiliary Code U-1 and Later Harvest Timer S4 dip switch 1 Controls and AdjustmentsDefault Dip Switch Settings S4 Dip Switch S4 Dip Switch No S4 Dip Switch Setting Time seconds Inlet Pump-Out Timer S4 dip switch 3Pump-Out Frequency Control S4 dip switch 5 Control Board S4 Dip Switch Setting Bin Control Bin Control Selector/Harvest Pump Timer S4 dip switchFactory Use S4 dip switch Control Board S4 Dip Switch Setting Pump Motor Time seconds Refill Counter S5 dip switch 2 through 5 G Control Board Freeze Timer S4 dip switch 9Float Switch Control S5 dip switch 1 G Control Board S4 Dip Switch Setting Time Minutes Bin Control Float SwitchControl Switch Thermistor Water Pump Switch Discharge Line KM-901MAH air-cooled and KM-901MWH water-cooled Wiring DiagramsModelCooled-AirWater-Cooled Model PressureHigh* Switch High PressureSwitchKM-901MRH remote air-cooled KM-901MRH3 remote air-cooled Switch Cooled-WaterModel Cooled-AirModel High* Pressure High Pressure Switch SwitchPressure Performance Data 1480 912835 1570 KM-901MRH remote air-cooled KM-901MRH3 remote air-cooled IV. Service Diagnosis Diagnostic ProcedurePage OFF Control Board Check Shutdown Thermostatic Bin Control Auxiliary Code T-0, U-0 Bin Control Check Control Correct LED Board Lighting Sequence Mechanical Bin Control Check Mechanical Bin Control Cleaning Float Switch Check and Cleaning Float Switch Check Float Switch Cleaning Thermistor Check No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Problem Possible Cause Remedy Low Ice Production Abnormal Ice Other Refrigerant Recovery Removal and Replacement of ComponentsService for Refrigerant Lines Brazing Evacuation and Recharge R-404A Removal and Replacement of Compressor Removal and Replacement of Expansion Valve Page Removal and Replacement of Evaporator Removal and Replacement of Air-Cooled Condenser Removal and Replacement of Water-Cooled Condenser Removal and Replacement of Remote Air-Cooled Condenser Page Adjustment of Water Regulating Valve water-cooled model Removal and Replacement of Thermistor Removal and Replacement of Inlet Water Valve Removal and Replacement of Pump Motor Removal and Replacement of Control Board VI. Cleaning and Maintenance Cleaning and Sanitizing Instructions Cleaning Procedure Sanitizing Procedure Following Cleaning Procedure Maintenance Preparing the Icemaker for Long Storage Drain the water tank