Hoshizaki KM-901MWH Diagnostic Charts, No Ice Production, Problem Possible Cause Remedy

F. Diagnostic Charts

1. No Ice Production

Problem	Possible Cause		Remedy
[1] The icemaker will not	a) Power Supply	1. Off, blown fuse, or	1. Turn on, replace, or reset.
start.		tripped breaker.
		2. Loose connection.	2. Tighten.
		3. Bad contacts.	3. Check for continuity and
			replace.
		4. Not within	4. Refer to nameplate and
		specifications.	correct.
	b) Transformer (115V	1. Voltage tap switch	1. Verify incoming voltage,
	primary) (3 phase only)	does not match	move switch to proper
		incoming voltage.	setting.
		2. Coil winding open or	2. Replace.
		shorted.
	c) Water Supply	1. Water supply off or	1. Check and get
		pressure too low.	recommended pressure.
	d) Thermostatic Bin	1. Tripped with bin filled	1. Remove ice.
	Control	with ice.
		2. Ambient temperature	2. Increase ambient
		too cool.	temperature.
		3. Set too warm.	3. See "IV.C.1. Thermostatic
			Bin Control Check."
		4. Bulb out of position.	4. Place in position.
		5. Bad contacts.	5. Check for continuity and
			replace.
	e) Fuse (Control Box)	1. Blown.	1. Check for short circuit and
			replace.
	f) Control Switch	1. "OFF" or "WASH"	1. Move to "ICE" position.
		position.
		2. Bad contacts.	2. Check for continuity and
			replace.
	g) High Pressure Control	1. Bad contacts.	1. Check for continuity and
			replace.
		2. Dirty air filter or	2. Clean.
		condenser.
		3. Ambient or condenser	3. Reduce temperature.
		water temperature too
		warm.
		4. Refrigerant	4. Recover, evacuate, and
		overcharged.	recharge.
		5. Fan not operating	5. See chart 1.[7].
		(except water-cooled
		model).
		6. Refrigerant lines or	6. Recover, repair, replace
		components restricted.	drier, evacuate and
			recharge.
		7. Condenser water	7. Check and get
		pressure too low or off	recommended pressure.
		(water-cooled model).

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