Hoshizaki KM-630MAH IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION, Problem, Possible Cause, Remedy

IV. SERVICE DIAGNOSIS 1. NO ICE PRODUCTION

PROBLEM	POSSIBLE CAUSE							REMEDY
[1] The icemaker	a) Power Supply	1.				“OFF” position.	1.	Move to “ON” position
will not start			2.			Loose connections.	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 out.	1. Check for short circuit
	Disconnect, if any)							and replace
	c) Control Switch	1.				“OFF” position.	1.	Move to “ICE” position.
			2.			Bad contacts.	2.	Check for continuity and
								replace.
	d) Bin Control	1.				Tripped with bin filled	1.	Remove ice.
	Thermostat					with ice.
					2. Ambient temperature		2. Increase ambient
						too cool.		temperature.
		3.				Set too warm.	3.	See “II.2.[d]
	For mechanical							CONTROLS AND
	bin control							ADJUSTMENTS, 5) Bin
	see “II. 3. [c]”							Control.”
					4. Bulb out of position.		4.	Place in position.
		5.			Bad contacts or leaks	5.	Check for continuity and
						bulb.		replace.
	e) High Pressure	1.				Bad contacts.	1.	Check for continuity and
	Control							replace.
	f) Transformer	1.				Thermal fuse blown out	1. Replace.
						or coil winding opened.
	g) Wiring to	1.				Loose connections or	1.	Check for continuity and
	Controller Board					open.		replace.
	h) Thermistor	1.				Leads short-circuit or	1.	See “II.2.[d] CONTROLS
						open and High		AND ADJUSTMENTS, 1)
						Temperature Safety		Defrost Control.”
						operates.
	i) Hot Gas Solenoid	1.				Continues to open in	1. Check for power off in
	Valve					freeze cycle and High		freeze cycle and replace.
						Temperature Safety
						operates.
	j) Water Supply Line	1.				Water supply off and	1.	Check and get
						water supply cycle does		recommended pressure.
						not finish.
					2. Condenser water pressure		2.	Check and get
						too low or off and Pressure	recommended pressure.
						Control opens and closes
						frequently to finally operate
						High Temperature Safety.
	k) Water Solenoid	1.				Mesh filter or orifice gets	1.	Clean.
						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.

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