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Ice Purge Cycle
1. Control Board a) No power to gear motor.
2. Gear Motor a) External protector (gear motor overload) open.
b) Internal protector open.
c) Motor winding open.
d) Mechanical failure.
3. Coupling a) Defective.
Freeze Cycle
1. Control Board a) Defective.
2. Compressor a) External protector open.
b) Motor winding open.
c) Capacitor defective.
d) Start relay defective.
e) Mechanical failure.
3. Fan Motor a) Motor winding or internal protector open.
b) Bearing worn out or locked rotor.
4. Evaporator a) Dirty.
b) Damaged or defective.
5. Thermostatic Expansion Valve
(TXV)
a) Bulb loose.
b) Operating erratically.
6. Refrigerant Charge a) Low.
7. Drain Valve a) Dirty, leaking by.
b) Defective coil.
8. Water System a) Water leaks.
Rell
1. Water Supply a) Off.
2. Float Switch
See "IV.E. Float Switch Check
and Cleaning."
a) Float does not move freely.
b) Defective.
3. Water Control Relay a) Energized(upperoatswitchstuckclosed).
b) Defective.
4. Inlet Water Valve a) Screen or orice clogged.
b) Coil winding open.
Shutdown
1. Bin Control a) Not enough ice in bin to trip actuator paddle.
b) Proximity switch defective.
c) Actuator paddle does not move freely.
2. Control Board a) Defective.