Hoshizaki DCM-750BWH-OS, DCM-750BAH-OS service manual Dispensing

Problem	Possible Cause		Remedy
[4] Gear motor overload	a)Power Supply	1. Not within	1. Refer to nameplate and
protector operates		specifications.	correct.
frequently or fuse	b)Evaporator Assembly	1. Bearings or auger	1. Replace bearings or
blows frequently.
		worn out.	auger. See "V.F.1. Upper
			Bearing Wear Check."
	c) Bin Control	1. Bad contacts.	1. Check for continuity and
			replace.
		2. Actuator does not	2. Clean actuator or replace
		move freely.	bin control assembly.
	d)Safety Switch and	1. Switch misaligned,	1. Check and correct or
	Relay	contacts bad.	replace.
	e)Control Board	1. Erratic operation of	1. See "II.D.4. Control Board
		gear motor relay.	Check Procedure."

4. Dispensing

Problem	Possible Cause		Remedy
[1] No ice dispensed.	a) Power Supply	1. "OFF" position.	1. Move to "ON" position.
		2. Loose connection.	2. Tighten.
		3. Bad contacts.	3. Check for continuity and
			replace.
		4. Not within	4. Refer to nameplate and
		specifications.	correct.
	b) Ice Storage	1. No ice or little ice in	1. Make ice.
		storage bin.
		2. Ice bridge or ice block	2. Melt ice, resupply with
		formed.	new ice.
		3. Agitating motor	3. Check, replace.
		defective.
	c) Ice Dispense Switch	1. Opti Serve sensor	1. See "5. Opti Serve (OS)
		defective. (OS only)	Sensors."
		2. Bad contacts. (push	2. Check for continuity and
		button only)	replace.
	d) Shutter Assembly	1. Broken part.	1. Check and replace.
		2. Open windings on	2. Check continuity and
		solenoid.	replace.
	e) Dispense Gear Motor	1. Thermal protector is	1. Allow to cool.
		tripped.
		2. Gear motor winding	2. Replace.
		open.
		3. Bearing worn out.	3. Replace.
		4. Wiring to gear motor.	4. Check for loose
			connection or open
			circuit, and replace wiring
			as needed.
		5. Defective capacitor.	5. Replace.
	f) Auger Mechanism	1. Bad alignment of	1. Realign.
		auger.
	g) Control Board	1. Defective.	1. See "II.D.4. Control
			Board Check Procedure."

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