Hoshizaki KM-901MAH, KM-901MWH, KM-901MRH/3 service manual Problem Possible Cause Remedy

Problem	Possible Cause			Remedy
[1] The icemaker will not	h) Transformer		1. Coil winding open or	1. Replace.
start. (continued)			shorted.
	i)	Wiring to Control Board	1. Loose connections or	1. Check for continuity and
			open.	replace.
	j)	Interlock Switch	1. Open position.	1. Move to closed position.
		(Cleaning Valve)
			2. Bad contacts.	2. Check for continuity and
				replace.
	k) Mechanical Bin Control		1. Movement restricted.	1. Check and free.
			2. Defective	2. See "IV.C.2. Mechanical
				Bin Control Check and
				Cleaning."
	l)	Thermistor	1. Leads shorted or open	1. See "IV.E. Thermistor
			and high temperature	Check."
			or harvest backup
			timer safety operates
			(1 beep or 2 beep
			alarm).
	m)Hot Gas Valve		1. Continues to open	1. Check for hot gas valve
			in freeze cycle and	stuck open and replace.
			freeze timer safety
			operates (3 beep
			alarm).
	n) Inlet Water Valve		1. Mesh filter or orifice	1. Clean.
			gets clogged and
			water supply cycle
			does not finish.
			2. Coil winding open.	2. Replace.
			3. Wiring to inlet water	3. Check for loose connection
			valve.	or open, and replace.
	o) Float Switch		1. Bad contacts.	1. Check for continuity and
				replace.
			2. Defective switch.	2. Clean or replace. See "IV.
				D. Float Switch Check and
				Cleaning."
	p) Control Board		1. Defective or in alarm.	1. See "IV.B. Control Board
				Check."
[2] Fill cycle will not	a) Water Supply		1. Water supply off or	1. Check and get
terminate.			pressure too low.	recommended pressure.
	b) Float Switch		1. Connector	1. Reconnect.
			disconnected.
			2. Float does not move	2. Clean or replace. See "IV.
			freely or switch	D. Float Switch Check and
			defective switch.	Cleaning."
	c) Control Board		1. Defective.	1. See "IV.B. Control Board
				Check."

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