Hoshizaki DCM-750BAH-OS, DCM-750BWH-OS service manual Low Ice Production

Problem	Possible Cause		Remedy
[5] All components	d) Evaporator	1. Defective.	1. Replace.
run, but no ice is
	e) Water Supply Line	1. Condenser water	1. Check and get
produced. (continued)
	(water-cooled model	pressure too low or	recommended pressure.
	only)	off and high pressure
		control opens and
		closes frequently.
	f) Water Regulating Valve	1. Water regulating	1. Clean, adjust, or replace.
	(water-cooled model	valve set too high or
	only)	clogged (water-cooled
		model only).

2. Low Ice Production

Problem	Possible Cause		Remedy
[1] Low ice production.	a)Evaporator	1. Dirty or defective.	1. Clean or replace.
	b)Bin Control	1. Erratic, sticking,	1. Clean or replace.
		defective.
	c) Drain Valve	1. Leaking water.	1. Clean or replace.
	d)Expansion Valve	1. Bulb loose.	1. Secure bulb.
		2. Operating erratically.	2. Check and replace.
	e)Refrigerant Charge	1. Low charge.	1. See "V.B. Service for
			Refrigerant Lines."
		2. Overcharge.	2. See "V.B. Service for
			Refrigerant Lines."
	f) Refrigerant Line	1. Refrigerant line or	1. Repair/replace the
		component restricted.	clogged line/component
			and replace the drier.
	g)High-Side Pressure	1. Dirty air filter or	1. Clean.
	Too High	condenser.
		2. Ambient (or	2. Reduce temperature.
		condenser) water
		temperature too warm.
		3. Fan motor slow rpm.	3. See "3. [2] a) Fan Motor."
		4. Fan motor capacitor.	4. Check and replace.
		5. Condenser water	5. Check and get
		pressure too low or off	recommended pressure.
		(water-cooled model
		only).
		6. Water regulating	6. Clean, adjust, or replace.
		valve set too high or
		clogged (water-cooled
		model only).
	h)Compressor	1. Inefficient compressor.	1. Replace
		2. Faulty thermal	2. Replace compressor.
		protector (overload).
		3. Faulty capacitor/	3. Replace.
		starter.

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