Hoshizaki KM-320MAH IV. Service Diagnosis No Ice Production, Problem Possible Cause Remedy

IV. Service Diagnosis

A. No Ice Production

Problem	Possible Cause		Remedy
[1] The icemaker will not	a)Power Supply	1. OFF position.	1. Move to ON position.
start.
		2. Loose connection.	2. Tighten.
		3. Bad contacts.	3. Check for continuity and
			replace.
		4. Voltage too high.	4. Check and get
			recommended voltage.
	b)Fuse (Inside fused	1. Blown.	1. Check for short circuit and
	disconnect, if any)		replace.
	c) Control Switch	1. OFF position.	1. Move to ICE position.
		2. Bad contacts.	2. Check for continuity and
			replace.
	d)Bin Control Thermostat	1. Tripped with bin filled	1. Remove ice.
		with ice.
		2. Ambient temperature	2. Increase ambient
		too cool.	temperature.
		3. Set too warm.	3. See "II.B.4. Controls
			and Adjustments, f) Bin
			Control."
		4. Bulb out of position.	4. Place in position.
		5. Bad contacts or leaks	5. Check for continuity and
		in bulb.	replace.
	e)High Pressure Control	1. Bad contacts.	1. Check for continuity and
			replace.
	f) Transformer	1. Thermal fuse blown or	1. Replace.
		coil winding opened.
	g)Wiring to Controller	1. Loose connections or	1. Check for continuity and
	Board	open.	replace.
	h)Thermistor	1. Leads short-circuit	1. See "II.B.4. Controls and
		or open and high	Adjustments, a) Defrost
		temperature safety	Control."
		operates.
	i) Hot Gas Solenoid Valve	1. Continues to open in	1. Check for power off in
		freeze cycle and high	freeze cycle and replace.
		temperature safety
		operates.

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