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Freeze-Up - Possible Cause
6. Float Switch
See "IV.D. Float Switch Check
and Cleaning"
a) Dirty, sticking.
b) Defective.
7. Refrigerant Charge a) Low.
8. Control Board
See "II.C.3. Controls and
Adjustments" and "IV.B. Control
Board Check"
a) Harvest timer (S4 dip switch 1 & 2) set too short.
b) Harvest pump timer (S4 dip switch 7) not in factory default position.
c) Defective.
9. Bin Control
See "IV.C. Bin Control Check and
Cleaning"
a) Actuator does not move freely.
10. Thermistor
See "IV.E. Thermistor Check"
a) Loose, disconnected, or defective.
11. Thermostatic Expansion Valve a) Defective.
12. Hot Gas Valves (KMS & SRK) a) Closed or restricted.
13. Liquid Line Valves (KMS & SRK) a) Open.
Freeze Cycle
1. Evaporator a) Scaled up.
b) Damaged.
2. Spray Tubes and/or Spray
Guides
a) Dirty.
b) Out of position.
3. Refrigerant Charge a) Low.
4. Control Board
See "IV.B. Control Board Check"
a) Freeze timer (S4 dip switch 9 & 10) set incorrectly.
b) Defective.
5. Fill/Rell or Harvest Water Valve a) Leaking by.
6. Float Switch
See "IV.D. Float Switch Check
and Cleaning"
a) Float does not move freely.
b) Defective.
7. Pump Motor a) RPM too slow.
b) Impeller damaged.
8. Thermostatic Expansion Valve a) Bulb loose or defective.
9. Headmaster (C.P.R.) a) Defective.
10. Liquid Line Valves (KMS & SRK) a) Restricted.