Hoshizaki Troubleshooting Guide for Refrigerators (Model KM-650MRH)

Problem	Possible Cause		Remedy
[1] The icemaker will not	e)High Pressure Control	3. Ambient or condenser	3. Reduce temperature.
start. (continued)	(continued)	water temperature too
		warm.
		4. Refrigerant	4. Recharge.
		overcharged.
		5. Fan not operating.	5. See chart 1.[6]
		(except water-cooled
		model)
		6. Refrigerant line or	6. Clean and replace drier.
		components plugged.
		7. Condenser water	7. Check and get
		pressure too low or off.	recommended pressure.
		(water-cooled model
		only)
	f) Transformer	1. Coil winding opened	1. Replace.
		or shorted.
	g)Wiring to Control Board	1. Loose connections or	1. Check for continuity and
		open.	replace.
	h)Thermistor	1. Leads shorted or	1. See "II.C.3. Controls and
		opened and high	Adjustments, b) Harvest
		temperature or harvest	Control."
		backup timer safety
		operates. (1 beep or 2
		beep alarm)
	i) 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)
	j) Water Supply Line	1. Water supply off and	1. Check and get
		water supply cycle	recommended pressure.
		does not finish.
		2. Condenser water	2. Check and get
		pressure too low	recommended pressure.
		or off and pressure
		control opens and
		closes frequently to
		finally operate high
		temperature safety.
		(1 beep alarm)
	k) Inlet Water Valve	1. Mesh filter or orifice	1. Clean.
		gets clogged and
		water supply cycle
		does not finish.
		2. Coil winding opened.	2. Replace.
		3. Wiring to water valve.	3. Check for loose
			connection or open, and
			replace.
	l) Control Board	1. Defective.	1. See "II.C.4. Control Board
			Check Procedure."

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