Manuals / Hoshizaki / Kitchen Appliance / Ice Maker

Hoshizaki MWH, MRH/3 Diagrams With Harvest Pump Timer Relays, a KM-515MAH, Output, C ontrol, Psig

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

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2.Diagrams With Harvest Pump Timer Relays

a)KM-515MAH

Transformer	10.5V at 115V	SwitchPressure	412±22	PSIG327±22
Control	Output	SwitchPressure	412±22	PSIG327±22
			PSIG
			0
		* High-	Cut-out	Cut-in
		*
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Hoshizaki MWH KM-515MAH, MRH/3, MWH(-M) Diagrams With Harvest Pump Timer Relays, a KM-515MAH, Output, C ontrol, Psig

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, continuedA. Construction I. Construction and Water/Refrigeration Circuit Diagram1. Air-Cooled Models MAH 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 DiagramDischarge Line 2. Water-Cooled Models MWH-MFreeze Pump Out 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 CleaningVent Flush Shaft Float Switch Housing Float Retainer Rod Rubber Boot 2. Float Switch Cleaningand Hose F. Thermistor Check 1. No Ice Production G. Diagnostic TablesNo Ice Production - Possible Cause 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 56. Factory Use S4 dip switch 2 Harvest Pump Timer, G Control Board7. Freeze Timer S4 dip switch 9 8. Float Switch Selector S5 dip switch 1 G Control Board D. Control Switch9. Refill Counter S5 dip switch 2 through 5 G Control Board A. Refrigeration Circuit Service Information IV. Refrigeration Circuit and Component Service Information1. Refrigerant Recovery 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 1. Remove the water from the icemaker water line VI. Preparing the Appliance for Periods of Non-Use2. Remove the water from the water tank 6 Close the drain valves VII. Disposal 1. KM-320MAH VIII. Technical Information A. Specification Sheetsdesign 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 priorNote We reserve the right to make changes in specifications 8. KM-650MWHand design without prior 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 1. Diagrams Without Harvest Pump Timer Relays C. Wiring Diagramsa KM-320MH, KM-515MH, KM-600MAH Control utputO b KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWHPSIG 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