Hoshizaki KM-630MWH, KM-630MRH, KM-630MAH service manual Low Ice Production, Abnormal Ice, Others

3. LOW ICE PRODUCTION

PROBLEM		POSSIBLE CAUSE	REMEDY
[1]	Freeze cycle	a) See chart 1 - [3], and check dirty Air Filter or Condenser, ambient or water
	time is long.	temperature, water pressure, Water Regulator or refrigerant charge.
		b) See chart 2 - [1], and check Float Switch, Water Solenoid Valve or Controller
		Board.
[2]	Harvest cycle	a) See chart 2 - [2], and check Controller Board, Thermistor, Evaporator, ambient
	time is long	and/or water temperature, water supply line, Water Solenoid Valve, or Expansion
		Valve.

4. ABNORMAL ICE

PROBLEM	POSSIBLE CAUSE			REMEDY
[1] Small Cube	a) Ice Cube Guide	1.	Out of position.	1. Place in position.
			Circulated water falls into
			bin.
	b) See chart 1 - [5], and check water supply line, Water			Solenoid Valve, water system,
	Pump Motor or Controller Board.
	c) Drain Valve	1.	Dirty.	1. Clean.
[2] Cloudy or	a) See chart 2 - [1] and - [3], and check Float Switch, Water Solenoid Valve,
irregular cube	Controller Board, Spray Tubes, water system, refrigerant charge or Expansion
	Valve.
	b) Spray Guide	1.	Dirty.	1. Clean.
	c) Water Quality	1.	High hardness or contains	1. Install a water filter or
			impurities.	softener.

5. OTHERS

PROBLEM	POSSIBLE CAUSE			REMEDY
[1] Icemaker will	a) Bin Control	1.	Set too cold.	1. Adjust warmer.
not stop when	Thermostat	2. Defective.		2. Replace.
bin is filled
with ice.	For mechanical
	bin control
	see “II. 3. [c]”
[2] Abnormal	a) Pump Motor	1. Bearings worn out.		1. Replace.
noise	b) Fan Motor	1. Bearings worn out.		1. Replace.
		2. Fan blade deformed.		2. Replace fan blade.
		3.	Fan blade does not move	3. Replace.
			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 lines or other	1. Replace.
			surfaces.
[3] Ice in storage	a) Bin Drain	1. Plugged.		1. Clean.
bin often
melts.

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