Hoshizaki 73180 service manual Diagnostic Charts, No Ice Production Possible Cause Startup

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F. Diagnostic Charts

The diagnostic charts below list possible reasons for problems with ice production and shutdown. Before consulting the diagnostic charts, check for correct installation, proper voltage per unit nameplate, and adequate water supply.

1. Auxiliary Codes A-1 and Earlier

No Ice Production - Possible Cause

		Startup
	1. Power Supply	a) Unplugged, off, blown fuse, or tripped breaker.

		b) Not within specifications.

	2. Power Switch	a) "OFF" position.

		b) Bad contacts.
	3. Bin Control Thermostat Assembly	a) Open with bin filled with ice.
	(with integrated heater)
	NOTICE! Some units contain	b) Ambient temperature too cool.
	NOTICE! Some units contain
	a sticker that states: "The
	a sticker that states: "The	c) Out of position.
	bin control heater has been	c) Out of position.
	bin control heater has been
	disconnected. DO NOT
	disconnected. DO NOT	d) Out of adjustment. See "IV.C. Bin Control Check."
	reconnect the bin control	d) Out of adjustment. See "IV.C. Bin Control Check."
	reconnect the bin control
	heater." In this case, leave
	heater." In this case, leave	e) Bad contacts.
	the bin control heater	e) Bad contacts.
	the bin control heater
	disconnected or replace
	disconnected or replace	f) Bad thermostat heater (if applicable).
	the bin control thermostat	f) Bad thermostat heater (if applicable).
	assembly with 3A2561A03.

	4. Optional Drain Pump HS-0248	a) Open.
	Safety

		Freeze Cycle

	1. Water Supply	a) Water supply off or improper water pressure.
		b) External water filters clogged.

	2. Gear Motor	a) Gear motor external protector (2.4~3.0A) tripped.

		b) Gear motor internal protector open or windings open.

		c) Bad gear motor capacitor.
		d) Locked bearings.

		e) Spline coupling or gear broken and auger not turning.

	3. Suction Temperature Safety	a) Open due to water supply cut-off.
	(Low Water/Freeze-Up Safety)
	(Low Water/Freeze-Up Safety)	b) Open due to evaporator freeze‑up (gear motor not operating).

		c) Bad contacts.
	4. Fan Motor	a) Motor winding open.

		b) Bearing worn out or locked rotor.

		c) Fan blade does not move freely.

	5. Compressor Relay	a) Open coil.
		b) Open contacts.

	6. Compressor	a) Compressor external protector open or defective.

		b) Motor winding open.

		c) PTC relay contacts bad or coil winding open.
		d) Inefficient.

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Contents 100BAF-DS 100BAF-AD 100BAF-ADDS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Auxiliary Codes A-1 and Earlier Specifications 100BAFAuxiliary Codes A-2 and Later 100BAF-DS 100BAF-DS, 2. Auxiliary Codes A-2 and Later 100BAF-AD 100BAF-AD, 2. Auxiliary Codes A-2 and Later 100BAF-ADDS 100BAF-ADDS, 2. Auxiliary Codes A-2 and Later Front II. General Information ConstructionAuxiliary Codes Rear Auxiliary CodesIcemaking Unit Freeze Cycle Sequence of OperationFill Cycle Auxiliary Codes A-1 and Earlier Auxiliary Codes A-2 and Later Auxiliary Codes A-2 and Later Wiring DiagramIcemaker with Optional Drain Pump HS-0248 100BAF Series Performance DataIV. Service Diagnosis Diagnostic ProcedureIce Production Check Page Auxiliary Codes A-2 and Later Bin Control Check Float Switch Check Lower Float white Plastic Retainer Clip Float Switch CleaningOptional Drain Pump HS-0248 OverviewDrain Pump Check Priming Instructions Float Switch Cleaning No Ice Production Possible Cause Startup Diagnostic ChartsShutdown Fill Cycle and Refill Cycle Shutdown Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Evacuation and Recharge R-134a BrazingComponent Important Notes for Component ReplacementRemoval and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of Extruding Head Removal and Replacement of Auger Removal and Replacement of Evaporator Page 5b. Lower Housing Page VI. Maintenance Frequency Area Task Maintenance ScheduleCleaning Solution Cleaning and Sanitizing InstructionsPage Sanitizing Solution Page Cleaning Solution Page Sanitizing Solution Storage Bin Drain Condenser Auxiliary Codes A-1 and Earlier Skip to step VII. Preparing the Icemaker for Periods of Non-UseVIII. Disposal