Ice-O-Matic Counter Top Dispenser IOD16022, Product Manual, Page: 11 / 22

IOD16022
Service Diagnosis/Electrical Sequence IOD22030
Page 10
Service Diagnosis
PROBLEM PROBABLE CAUSE CORRECTION
Will not dispense No ice in hopper Fill bin with ice
ice
Vend switch does not close Check vend switch, replace if open
Drive motor not working Check drive motor, replace if not working
Door solenoid will not open door Check/replace door and solenoid
Rotor will not turn Check hub of rotor
Relay for vend switch does not Check relays, replace as required
close during operation
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.