Hoshizaki KM-320MWH, KM-320MAH service manual Low Ice Production, Abnormal Ice, Other

C. Low Ice Production

Problem	Possible Cause	Remedy
[1]Freeze cycle time is	a) See chart A.[3] and check dirty air filter or condenser, ambient or water
long.	temperature, water pressure, water regulator, and refrigerant charge.
	b) See chart B.[1] and check float switch, water solenoid valve and controller
	board.
[2]Harvest cycle time is	a) See chart B.[2] and check controller board, thermistor, evaporator, ambient
long.	and/or water temperature, water supply line, water solenoid valve, line valve,
	and gas valve.

D. Abnormal Ice

Problem	Possible Cause		Remedy
[1] Small cubes.	a) Ice Cube Guide	1. Out of position.	1. Place in position.
		Circulated water falls
		into bin.
	b) See chart A.[5] and check water supply line, water solenoid valve, water
	system, pump motor, and controller board.
	c) Drain Valve	1. Dirty.	1. Clean.
[2] Cloudy or irregular	a) See chart B.[1] and B.[3], and check float switch, water solenoid valve,
cubes.	controller board, spray tubes, water system, refrigerant charge, and expansion
	valve.
	b) Spray Guide	1. Dirty.	1. Clean.
	c) Water Quality	1. High hardness or	1. Install a water softener or
		contains impurities.	filter.

E. Other

Problem	Possible Cause		Remedy
[1]Icemaker will not stop	a) Bin Control Thermostat	1. Set too cold.	1. Adjust warmer.
when bin is filled with
		2. Defective.	2. Replace
ice.
[2] Abnormal noise.	a) Pump Motor	1. Bearings worn out.	1. Replace
	b) Fan Motor	1. Bearings worn out.	1. Replace
		2. Fan blade deformed.	2. Replace fan blade.
		3. Fan blade does not	3. Replace.
		move freely.
	c) Compressor	1. Bearings worn out or	1. Replace.
		cylinder valve broken.
		2. Mounting pad out of	2. Reinstall.
		position.
	d) Refrigerant Lines	1. Rub or touch other	1. Replace.
		lines or surfaces.
[3]Ice in storage bin	a) Bin Drain	1. Plugged.	1. Clean.
often melts.
	b) Icemaker and Bin	1. Drains not run	1. Separate the drain lines.
		separately.

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