Service Manual

32
Freeze Cycle
1. Compressor Control Relay a) No voltage from gear motor.
b) Defective.
2. Control Board a) No power to pump-down solenoid valve or not reading compressor
control relay condition. Defective.
3. Pump-Down Solenoid Valve a) Defective.
4. Control Low-Pressure Switch a) Refrigerant pressure too low.
b) Out of adjustment or defective.
5. Safety Low-Pressure Switch
(manual reset)
a) Refrigerant pressure too low.
b) Defective.
6. High-Pressure Switch a) Dirty condenser.
b) Fan(s) not operating.
c) Ambient temperature too warm.
d) Refrigerant overcharged.
e) Refrigerant line or component restricted.
7. Magnetic Contactor a) Defective.
8. Condensing Unit Fan Motor(s) a) Defective capacitor.
b) Fan blade binding.
c) Defective.
9. Compressor a) Start or run capacitor defective.
b) Start relay defective.
c) Defective.
10. Refrigerant Line a) Gas leaks.
b) Refrigerant line or component restricted.
11. Thermostatic Expansion Valve
(TXV) (not adjustable)
a) Defective.
12. Evaporator a) Dirty.
b) Damaged or defective.
13. Headmaster (C.P.R.) a) Not operating properly and liquid line temperature too warm.
14. Drain Valve a) Dirty, leaking by.
b) Defective.
15. Water System a) Water leaks.
Rell
1. Float Switch a) Dirty/sticking.
b) Defective.
2. Inlet Water Valve a) Clogged or defective.
3. Water Supply a) Off.
4. Control Board a) No power to oat switch or not reading oat switch condition.
b) No power to inlet water valve.