Manuals / Hoshizaki / Kitchen Appliance / Ice Maker

Hoshizaki MRH KM-901MAH VIII. Technical Information A. Specification Sheets, KM-320MAH, design

Models: KM-320MAH MRH KM-600MAH KM-650MAH MWH(-M) MRH KM-901MAH MRH/3 MWH KM-515MAH MWH

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VIII. Technical Information

A. Specification Sheets

1. KM-320MAH

AC SUPPLY VOLTAGE	115/60/1
AMPERAGE	9.7 A (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	*325 (147)		311 (141)		287 (130)
Reference without *marks	80	315 (143)		293 (133)		265 (120)
	90	311 (141)		*278 (126)		251 (114)
SHAPE OF ICE	100	304 (138)		272 (123)		226 (103)
SHAPE OF ICE	Crescent Cube
ICE PRODUCTION PER CYCLE	7.2 lbs. (3.3 kg) 360 pcs.
APPROXIMATE STORAGE CAPACITY	N/A
ELECTRIC & WATER CONSUMPTION	90/70°F			70/50°F
ELECTRIC W (kWH/100 lbs.)	800(6.9)			750(5.5)
WATER gal./24HR (gal./100 lbs.)	51(18.4)			117(35.9)
EXTERIOR DIMENSIONS (WxDxH)	22" x 27-3/8" x 30-5/16" (560 x 695 x 770 mm)
EXTERIOR FINISH	Stainless Steel, Galvanized Steel (Rear)
WEIGHT	Net 123 lbs. (56 kg), Shipping 153 lbs. (70 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	Thermostatic or Mechanical Bin Control
COMPRESSOR	Hermetic, Model ASE32C3E-CAA
CONDENSER	Air-Cooled, Fin and Tube Type
EVAPORATOR	Vertical Type, Stainless Steel and Copper
REFRIGERANT CONTROL	Thermostatic Expansion Valve
REFRIGERANT CHARGE	R-404A, 1 lb. 4.3 oz. (575g)
DESIGN PRESSURE	High 467PSIG, Low 210PSIG
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
OPERATING CONDITIONS	VOLTAGE RANGE					104 - 127 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 MRH KM-901MAH, MWH KM-515MAH, MRH/3 VIII. Technical Information A. Specification Sheets, KM-320MAH, design

Contents

HoshizakiHoshizaki America, Inc SERVICE MANUALModular Crescent Cuber Models KM-320MAH, MWH618 Highway 74 South Peachtree City, GA Complete and detailed explanation of the problemPhone 1-800-233-1940 770 Fax 1-800-843-1056 770 E-mail techsupport@hoshizaki.com HOSHIZAKI AMERICA, INCCONTENTS 8. Float Switch Selector S5 dip switch 1 G Control Board 5. Bin Control Selector or Harvest Pump Timer Operation S4 dip switch6. Factory Use S4 dip switch 7. Freeze Timer S4 dip switch 9a KM-320MH, KM-515MH, KM-600MAH C. Wiring Diagrams1. Diagrams Without Harvest Pump Timer Relays 2. Diagrams With Harvest Pump Timer RelaysIndicates a situation which could result in damage to the Important Safety InformationIndicates a hazardous situation which could result in death or serious injuryAdditional Warning for Remote Models WARNING, continued1. Air-Cooled Models MAH I. Construction and Water/Refrigeration Circuit DiagramA. Construction Model Shown KM-515MWH 2. Water-Cooled Models MWH-MThermostatic Bin Control Bracket & Bulb Holder 3. Remote Models MRH/3Spray Tubes Inlet Water Valve Cleaning Valve Control Switch Thermostatic Bin Control Float Switch Water Pump Compressor1. Air-Cooled Models MAH B. Water/Refrigeration Circuit DiagramFreeze Pump Out 2. Water-Cooled Models MWH-MDischarge Line Freeze Pump- Out 3. Remote Models MRH/3Components Energized when the Control Switch is in the WASH Position A. Sequence of Operation Flow ChartE and G Control Board Without Harvest Pump Timer Operation Flow Chart II. Sequence of Operation and ServiceDiagnosis1. Bin Full Thermostatic Bin Control Shutdown Sequence Flow ChartMechanical Bin Control Shutdown Sequence Flow Chart Shutdown DelayComponents Energized when the Control Switch is in the WASH Position G Control Board With Harvest Pump Timer Operation Sequence Flow Chart2. G Control Board with Harvest Pump Timer OperationB. Service Diagnosis 1. E and G Control Board without Harvest Pump Timer Diagnosis If energized, replace CB. If de-energized and bypassing, replace LLV a Freeze Cycle Diagnosis Confirm Comp and FMR continue. Confirm that For LLV, check coil voltage and continuity CB K1 #5 DBU to neutral W. If 115VAC is not present, replace CB b Mechanical Bin Control 9 Shutdown a E Control Board Thermostatic Bin Control TBC2. G Control Board with Harvest Pump Timer Diagnosis d WRV Diagnosis Confirm WRV is not leaking by 50 sec. before harvest terminates, PM energizes. See step 5b belowPage For LLV, check coil voltage and continuity G Control Board G Control Board SettingsS4 Dip Switch Setting Pump-Out9 Shutdown Mechanical Bin Control C. Control Board Check 1. Thermostatic Bin Control Check D. Bin Control CheckLegend MBC-mechanical bin control CB-control board 4 Check MBC wire harness connections. See Fig5 Disconnect MBC connector from CB K4 connector 9 Check that CB green BC CLOSED LED is onb Mechanical Bin Control Cleaning 1. Float Switch Check E. Float Switch Check and Cleaningand Hose 2. Float Switch CleaningVent Flush Shaft Float Switch Housing Float Retainer Rod Rubber Boot F. Thermistor Check No Ice Production - Possible Cause G. Diagnostic Tables1. No Ice Production Harvest Cycle 2. Freeze-UpNo Ice Production - Possible Cause Freeze-Up - Possible CauseLow Ice Production - Possible Cause 3. Low Ice ProductionFreeze-Up - Possible Cause Freeze CycleLong Freeze Cycle Low Ice Production - Possible CauseIII. Controls and Adjustments E Control Board A. Control Board LayoutE Control Board 1. E Control BoardPart Number 2A3792-01 G Control Board2. G Control Board G Control Board1. E Control Board B. LED Lights and Audible Alarm Safeties2. G Control Board b G Control Board with Harvest Pump Timer Operation C. Settings and Adjustments1. Default Dip Switch Settings a E and G Control Board without Harvest Pump Timer Operation3. Pump-Out Timer S4 dip switch 3 2. Harvest Timer S4 dip switch 11 Bin Control Selector, E Control Board 4. Pump-Out Frequency Control S4 dip switch 57. Freeze Timer S4 dip switch 9 2 Harvest Pump Timer, G Control Board6. Factory Use S4 dip switch 9. Refill Counter S5 dip switch 2 through 5 G Control Board D. Control Switch8. Float Switch Selector S5 dip switch 1 G Control Board 1. Refrigerant Recovery IV. Refrigeration Circuit and Component Service InformationA. Refrigeration Circuit Service Information 3. Evacuation and Recharge R-404A 2. Brazing10 Cap the refrigerant access valves to prevent a possible leak C. Water Regulating Valve Adjustment water-cooled model B. Component Service InformationV. Maintenance 2. Remove the water from the water tank VI. Preparing the Appliance for Periods of Non-Use1. Remove the water from the icemaker water line 6 Close the drain valves VII. Disposal design VIII. Technical Information A. Specification Sheets1. KM-320MAH design without 2. KM-320MWHdesign 3. KM-515MAHNote We reserve the right to make changes in specifications and without priorwithout prior 4. KM-515MWHNote We reserve the right to make changes in specifications and design5. KM-515MRH without prior 6. KM-600MAHNote We reserve the right to make changes in specifications and designdesign 7. KM-650MAHNote We reserve the right to make changes in specifications and without priorand design without prior 8. KM-650MWHNote We reserve the right to make changes in specifications 9. KM-650MWH-M AWAITING DATAwithout prior 10. KM-650MRHNote We reserve the right to make changes in specifications and designdesign 11. KM-901MAHwithout prior 12. KM-901MWHNote We reserve the right to make changes in specifications and designwithout prior 13. KM-901MRHwithout prior 14. KM-901MRH3kg./day B. Performance Data1. KM-320MAH AMBIENT TEMP2. KM-320MWH 3. KM-515MAH 4. KM-515MWH 5. KM-515MRH 6. KM-600MAH 7. KM-650MAH 8. KM-650MWH 9. KM-650MWH-M AWAITING DATA10. KM-650MRH 11. KM-901MAH 12. KM-901MWH 13. KM-901MRH 14. KM-901MRH3 a KM-320MH, KM-515MH, KM-600MAH C. Wiring Diagrams1. Diagrams Without Harvest Pump Timer Relays PSIG b KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWHControl utputO Control Output c KM-650MRH, KM-901MRHPressureSwitch Transformer 10.5V at115VCut-out d KM-901MRH3High-Pressure Switch Control Transformer Output 10.5V atC ontrol 2. Diagrams With Harvest Pump Timer Relaysa KM-515MAH OutputOutput 10.5V at b KM-650MAH, KM-650MWH, KM901MAH Control Transformer384± c KM-650MWH-MControl Transformer Output 10.5V at High-Pressure Switch Cut-outOutput 10.5V at High-Pressure Switchd KM-650MRH Control Transformer