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. Controls and Adjustments
- 1. Default Dip Switch Settings
- 2. Infrared Sensor Shutdown Delay (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)
- 6. Bin Control Shutdown Delay, Agitation, and Ice Purge Timer (S1 dip switch 8)
- 7. Bin Control Shutdown Delay (S1 dip switch 9)
- 8. Factory Use (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
31
No Ice Production - Possible Cause
Ice Purge Cycle
1. Control Board a) No power to gear motor.
b) No power to compressor control relay circuit (5VDC) or not reading
circuit.
2. Gear Motor a) 2A (DCM-300/500B_H(-OS)) or
3A (DCM-751/752B_H(-OS)) fuse blown.
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 a) Defective.
2. Start Relay a) Defective.
3. Start Capacitor or Run 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.