Hoshizaki F-450MAH-C service manual IV. Service Diagnosis No Ice Production

IV. 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 continuity
							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 21 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 does not	a)	Water Control Relay	1.	Contacts fused.	1.	Replace.
	stop, and the
				2.	Coil winding opened.	2. Replace.
	icemaker will not
	start	b)	Float Switch	1.	Bad contacts.	1.	Check for continuity
							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.

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