Ice-O-Matic Service Diagnosis, Symptom, Possible Cause, Probable Correction, MFI Series, Page

MFI Series		Service Diagnosis
Symptom	Possible Cause	Probable Correction
No ice is made nothing operates.	•Unit off due to no power	•Restore Power
	•Unit off due to master switch in OFF	•Switch master Switch to ON
	position
	•Unit off due to low water level	•Check water supply, filter
		strainer, float valve. Correct
		water supply.
	•Unit off due to ice level sensors.	•Check/clean ice level sensors.
	(Photo Eyes ) blocked.
	•Unit off due to scale on water level	•Clean water level sensor.
	sensor.
	•Unit off due to high pressure control open.	•Check for water interruption
		(water cooled) of fan motor
		failure.
	•Auger motor hums but does not turn.	•Auger can’t turn. Circuit board
		has not yet shut it down.
	•Unit is shut down.	•Circuit board has shut ice
		machine down due to high
		auger motor amp draw. Check
		for cause of high amp draw,
		including bearings, gear motor
		condition and scale on auger
		and in evaporator.

No ice, auger motor is turning.

•Low pressure control open.

•No power to circuit board.

•Circuit board gear motor relay will not close.

•Compressor contactor coil is open. •Compressor will not start.

•Auger not turning due to: motor failure; auger relay failure on circuit board; or or gears stripped. Check drive train.

•TXV restricted or not metering. Check bulb temperature. •Lack of refrigerant, check for

leak.

•Check for a restricted system.

•Check harness

•Hi or low pressure cut outs open.

•Check/replace board.

•Check/replace contactor.

•Check start capacitor. •Check start relay.

•Check compressor windings.

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