Hoshizaki F-80 I MAH (-c) V. Service Diagnosis 1. No Ice Production, Problem, Possible Cause

V. Service Diagnosis

1. No Ice Production

	PROBLEM		POSSIBLE CAUSE				REMEDY
[1]	The icemaker will	a)	Power Supply	1.	OFF position.	1.	Move to ON position.
	not start.
				2.	Loose connection.	2.	Tighten.
				3.	Bad contacts.	3.	Check for contintinuity
							and replace.
				4.	Blown fuse.	4.	Replace.
		b)	Power Switch	1.	Off position.	1.	Move to ON position.
			(Control Box)
				2.	Bad contacts.	2.	Check for continuity
							and replace.
		c)	Fuse (Control Box)	1.	Blown out.	1.	Check for short circuit
							and replace.
		d)	Circuit Protect Relay	1.	Miswiring.	1.	Check power supply
							voltage and wire
							properly.
		e)	Flush Timer	1.	Flushing out.	1.	Wait for 15 minutes.
				2.	Bad contacts.	2.	Check for continuity
							and replace.
		f)	Flush Switch	1.	FLUSH position.	1.	Move to ICE position.
				2.	Bad contacts.	2.	Check for continuity
							and replace.
		g)	Transformer	1.	Coil winding opened.	1.	Replace.
		h)	Control Water Valve	1.	Coil winding opened.	1.	Replace.
		i)	Shut-off Valve	1.	Closed.	1.	Open.
				2.	Water failure.	2.	Wait till water is
							supplied.
		j)	Plug and Receptacle	1.	Disconnected.	1.	Connect.
			(Control Box)
				2.	Terminal out of Plug	2.	Insert Terminal back in
					or Receptacle.		position
[2] Water flow does not		a)	Water Control Relay	1.	Contact fused.	1.	Replace.
	stop, and the
				2.	Coil winding opened.	2.	Replace.
	icemaker will not
		b)	Float Switch	1.	Bad contacts.	1.	Check for continuity
	start
							and replace.
				2.	Float does not move	2.	Clean or replace.
					freely.
		c)	Flush Water Valve	1.	Valve seat clogged	1.	Clean or replace
					and water leaking.
		d)	Hoses	1.	Disconnected.	1.	Connect.
[3]	Water has been	a)	Water Control Relay	1.	Bad contacts.	1.	Check for continuity
	supplied, but the						and replace.
	icemaker will not	b)	Bin Control	1.	Bad contacts.	1.	Check for continuity
	start.						and replace.
				2.	Activator does not	2.	Clean Axle and its
					move freely.		corresponding holes
							or replace Bin Control.
		c)	Gear Motor Relay	1.	Coil winding opened.	1.	Replace.
				2.	bad contacts.	2.	Check for continuity
							and replace.
		d)	Control Timer	1.	Broken.	1.	Replace.
			(Printed Circuit
			Board)
		e)	Gear Motor Protect	1.	Coil winding opened.	1.	Replace.
			Relay
				2.	Bad contacts.	2.	Check for continuity
							and replace.

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