Hoshizaki KM-1301SAH/3, KM-1301SRH/3, KM-1301SWH/3 service manual Evaporator is Frozen Up

Problem	Possible Cause		Remedy
[7] Fan motor will	a) Fan Motor	1. Motor winding open.	1. Replace.
not start, or is not
		2. Bearing worn out.	2. Replace.
operating (except
		3. Wiring to fan motor.	3. Check for loose connection
water-cooled model).
			or open, and replace.
		4. Defective capacitor.	4. Replace.
		5. Fan blade bound.	5. Check and replace.
	b) Control Board	1. Defective.	1. See "IV.B. Control Board
			Check."
[8] All components	a) Refrigerant	1. Low charge.	1. Check for leaks. Recover,
run, but no ice is			repair, evacuate, and
produced.			recharge.
		2. Air or moisture	2. Replace drier, evacuate,
		trapped.	and recharge.
	b) Compressor	1. Defective.	1. Replace.
	c) Hot Gas Valve	1. Continues to open in	1. Check and replace.
		freeze cycle.
	d) Liquid Line Valve	1. Continues to close in	1. Check and replace.
	(if applicable)	freeze cycle.
	e) Inlet Water Valve	1. Inlet water valve is	1. Check for water leaks with
		wide open during	icemaker off.
		freeze.
	f) Expansion Valve	1. Bulb loose.	1. Secure bulb.
		2. Operating erratically.	2. Check and replace.
	g) Headmaster (C.P.R.)	1. Not operating properly	1. Replace headmaster.
	(remote condenser	and liquid line
	unit)	temperature too warm.
	h) Water Supply Line	1. Condenser water	1. Check and get
	(water-cooled model)	pressure too low or	recommended pressure.
		off and high pressure
		control opens and
		closes frequently.
	i) Water Regulating Valve	1. Set too high.	1. Adjust or replace. See
	(water-cooled model)		"V.J. Adjustment of Water
			Regulating Valve."

2. Evaporator is Frozen Up

Problem	Possible Cause		Remedy
[1]Freeze cycle time is	a) Inlet Water Valve	1. Diaphragm does not	1. Check for water leaks with
too long.		close.	icemaker off.
	b) Float Switch	1. Float does not move	1. Clean or replace. See "IV.
		freely or defective	D. Float Switch Check and
		switch.	Cleaning."
	c) Evaporator	1. Scaled up.	1. Clean.
		2. Damaged.	2. Replace.
	d) Spray Tubes	1. Dirty.	1. Clean.
		2. Out of position.	2. Place in position.
	e) Water Pump	1. RPM too slow.	1. See chart 1.[5].

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