Hoshizaki KM-630MRH, KM-630MWH, KM-630MAH service manual Problem Possible Cause Remedy

PROBLEM	POSSIBLE CAUSE					REMEDY
[5] No water	a) Water Supply Line	1.		Water pressure too low and	1.	Check and get
comes from				water level in Water Tank		recommended pressure.
Spray Tubes.				too low.
Water Pump
	b) Water Solenoid	1.		Dirty mesh filter or orifice	1.	Clean.
will not start, or	Valve			and water level in Water
freeze cycle				Tank too low.
time is too	c) Water System	1.		Water leaks.	1.	Check connections for
short.						water leaks, and replace.
			2. Clogged.		2.	Clean.
	d) Pump Motor		1. Motor winding opened.		1. Replace.
			2.	Bearing worn out.	2. Replace.
		3.		Wiring to Pump Motor.	3.	Check for loose
						connection or open, and
						replace.
		4.		Defective Capacitor.	4.	Replace.
		5.		Defective or bound impeller.	5. Replace and clean.
		6.		Mechanical Seal worn out.	6.	Check and replace.
	e) Controller Board	1.		Defective.	1.	See “II.2. [e] CHECKING
						CONTROLLER BOARD.”
[6] Fan Motor will	a) Fan Motor		1. Motor winding opened.		1. Replace.
not start, or is		2.		Bearing worn out.	2.	Replace.
not operating.
		3.		Wiring to Fan Motor.	3.	Check for loose
						connection or open, and
						replace.
		4.		Defective Capacitor.	4.	Replace
			5. Fan blade bound.		5.	Check and replace.
	b) Controller Board	1.		Defective.	1.	See “II.2. [e] CHECKING
						CONTROLLER BOARD.”
[7] All components	a) Refrigerant		1. Undercharged.		1. Check for leaks and
run but no ice						recharge.
is produced.
		2.		Air or moisture trapped.	2.	Replace Drier, and
						recharge.
	b) Compressor	1.		Defective valve.	1. Replace.
	c) Hot Gas Solenoid	1.		Continues to open in freeze	1.	Check and replace.
	Valve			cycle.
	d) Line Valve	1.		Continues to close in	1.	Check and replace
				freeze cycle.
	e) Water Supply Line		1. Condenser water pressure		1.	Check and get
	[Water-cooled model			too low or off and Pressure		recommended pressure.
	only]			Control opens and closes
				frequently.

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