24
No Ice Production - Possible Cause
16 Thermostatic Expansion Valve
a) Bulb loose.
b) Operating erratically.
17. Liquid Line Valve
a) Closed in freeze cycle.
b) Open in harvest cycle.
18. Fan Motor
a) Motor winding open.
b) Bearing worn out or locked rotor.
c) Defective capacitor.
19. Water System
a) Water leaks causing short freeze time.
2. Low Ice Production
Low Ice Production - Possible Cause
Long Harvest Cycle
1. Evaporator
a) Scaled up.
2. Spray Tubes and/or Spray
Guides
a) Dirty.
b) Out of position.
3. Refrigerant Charge
a) Low.
4. Water Supply
a) Low water pressure.
b) External water fi lters clogged.
c) Insuffi cient water line size.
Minimum 3/8" Nominal ID (10 mm Nominal OD in the EU) water
tubing or equivalent.
d) Too cold.
5. Control Board
See "II.C. Control Board Check"
a) Thermistor connection loose (K3).
b) Defective.
6. Thermistor
See "II.F. Thermistor Check"
a) Loose, disconnected, or defective.
7. Hot Gas Valve
a) Erratic or closed.
8. Inlet Water Valve
a) Screen or orifi ce clogged.
9. Compressor
a) Ineffi cient or off .
10. Liquid Line Valve
a) Erratic or open.
11. Thermostatic Expansion Valve
a) Defective.
Short Freeze Cycle
1. Low Water Supply
a) Water fi lters clogged.
2. Inlet Water Valve
a) Screen or orifi ce clogged.
3. Float Switch
a) Float does not move freely.
b) Defective.
4. Splash Guard
a) Missing or defective.
5. Check Valve
a) Dirty.
b) Defective.
6. Control Board
a) Defective.
