Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water Refrigeration Circuit Diagrams
- II. Sequence of Operation and Service Diagnosis
- III. Controls and Adjustments
- A. Control Board Layout
- B. LED Lights and Audible Alarm Safeties
- C. Settings and Adjustments
- 1. Default Dip Switch Settings
- 2. Bin Control Shutdown Delay (Infrared Sensor) (S1 dip switch 1, 2, 3)
- 3. Drain Frequency Control (S1 dip switch 4)
- 4. Continuous Dispensing Timer (S1 dip switch 5 & 6)
- 5. Bin Control Selector (S1 dip switch 7)
- 7. Bin Control Shutdown Delay (S1 dip switch 9)
- 8. Audible Alarm Silencer (S1 Dip Switch 10)
- D. Switches
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
27
No Ice Production - Possible Cause
Ice Purge Cycle
1. Control Board
See "II.C. Control Board Check"
a) No power to gear motor.
2. Gear Motor a) 3A external protector tripped.
b) Internal protector open.
c) Motor winding.
d) Mechanical failure.
3. Coupling a) Defective.
4. Compressor Control Relay a) Defective.
Freeze Cycle
1. Control Board
See "II.C. Control Board Check"
a) No power to compressor control relay circuit (5VDC) or not
reading circuit.
b) Compressor relay defective
2. Start Relay a) Defective.
3. Start Capacitor a) Defective.
4. Compressor a) External protector.
b) Motor winding.
c) Mechanical failure.
5. High-Pressure Switch Activates a) Dirty condenser.
b) Ambient temperature too warm.
c) Fan motor not operating.
d) Refrigerant overcharged.
e) Defective.
f) Refrigerant lines or components restricted.
6. Fan Motor a) Capacitor defective.
b) Motor winding.
c) Bearing worn out or locked rotor.
7. Evaporator a) Dirty.
b) Damaged or defective.
8. Thermostatic Expansion Valve
(TXV)
a) Bulb loose.
b) Operating erratically.
9. Refrigerant Charge a) Low.
10. Drain Valve a) Dirty, leaking by.
b) Defective coil.
c) Defective control board.
11. Water System a) Water leaks.