Hoshizaki DCM-750BAH-OS, DCM-750BWH-OS service manual Diagnostic Charts, No Ice Production

C. Diagnostic Charts

1. No Ice Production

Problem	Possible Cause			Remedy
[1] The icemaker will not	a) Power Supply		1. Off, blown fuse, or	1. Turn on, replace, or reset.
start. (Fill Cycle)			tripped breaker.
			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) Water Supply		1. Water supply off or	1. Check and get
			pressure too low.	recommended pressure.
	c) Power Switch		1. "OFF" position.	1. Move to "ON" position.
		(Control Box)
			2. Bad contacts.	2. Check for continuity and
				replace.
	d) Door Switch		1. Door switch not	1. Engage door switch.
			engaged.
			2. Bad contacts.	2. Check for continuity and
				replace.
	e) Power Protect Relay		1. Voltage not within	1. Refer to nameplate and
			specifications.	correct.
			2. Bad contacts.	2. Check for continuity and
				replace.
	f)	Transformer	1. Coil winding open.	1. Replace.
	g) Fuses (2)		1. Blown.	1. Check for short circuit and
				replace.
	h) Control Switch		1. "OFF" or "DRAIN"	1. Move to "ICE" position.
			position.
			2. Bad contacts.	2. Check for continuity and
				replace.
	i)	Water Control Relay	1. Bad contacts.	1. Check for continuity and
				replace.
			2. Coil winding open.	2. Replace.
	j)	Inlet Water Valve	1. Mesh filter or orifice	1. Clean.
			clogged.
			2. Coil winding open.	2. Replace.
			3. Wiring to inlet water	3. Check for loose or open
			valve.	connection. Repair or
				replace.
	k) Float Switch		1. Bad contacts.	1. Check for continuity and
				replace.
			2. Float does not move	2. Clean or replace.
			freely.
	l)	Bin Control	1. Open.	1. Bin full, check for
				continuity on proximity
				switch.
			2. Actuator sticking.	2. Adjust or replace.
			3. Proximity switch open.	3. Replace.

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