Ice-O-Matic IOD22030 Service Diagnosis/Electrical Sequence, Problem, Probable Cause, Correction

	IOD16022
Service Diagnosis/Electrical Sequence	IOD22030

Service Diagnosis
PROBLEM	PROBABLE CAUSE
Will not dispense	No ice in hopper
ice	Vend switch does not close
	Drive motor not working
	Door solenoid will not open door
	Rotor will not turn
	Relay for vend switch does not
	close during operation

CORRECTION

Fill bin with ice

Check vend switch, replace if open Check drive motor, replace if not working Check/replace door and solenoid Check hub of rotor

Check relays, replace as required

Electrical Sequence Reference Wiring Diagram, Page 20-21

Ice Vending

Ice is dispensed as long as the vend lever or push button is depressed or until the bin is empty.

When the ice vend lever or push button is depressed, the vend switch closes, and makes a circuit to the coil of relay A.

When relay A is energized, relay A’s contacts 4-6 and 5-3 close. Relays A’s contacts 5-1 open When relay A’s contacts 4-6 close, they make a circuit to the door solenoid, which opens the ice door. When relays A’s contacts 5-3 close, they make a circuit to the coil of relay B.

When relays A’s contacts 5-1 open, the circuit to the timer is opened.

When relay B’s coil is energized, it closes a circuit to the gearmotor, and the gearmotor turns the rotor.

Agitation

Relay A’s contacts 5-1 are closed and make a circuit to the timer.

The timer is energized when the unit is not dispensing. The timer switch will close for a few seconds every two hours.

When the timer switch is closed, it makes a circuit to relay B’s coil.

When relay B is energized, it powers the gearmotor and the rotor is turned.

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