IOD16022Service Diagnosis/Electrical Sequence IOD22030Page 10Service DiagnosisPROBLEM PROBABLE CAUSE CORRECTIONWill not dispense No ice in hopper Fill bin with iceiceVend switch does not close Check vend switch, replace if openDrive motor not working Check drive motor, replace if not workingDoor solenoid will not open door Check/replace door and solenoidRotor will not turn Check hub of rotorRelay for vend switch does not Check relays, replace as requiredclose during operationElectrical Sequence Reference Wiring Diagram, Page 20-21Ice VendingIce 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 tothe 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 openWhen 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 therotor.AgitationRelay 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 secondsevery 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.