Service Manual

42
3. 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 lters clogged.
c) Insufficient water line size.
Minimum1/4"nominalIDcopperwatertubingorequivalent.
d) Too cold.
5. Control Board
See "IV.B.ControlBoardCheck"
a) Thermistor connection loose (K3).
b) Defective.
6. Thermistor
See"IV.E.ThermistorCheck"
a) Loose, disconnected, or defective.
7. Hot Gas Valves (KMS & SRK) a) Erratic or closed.
8. Inlet Water Valve a) Screen or orice clogged.
9. Compressor a) Inefficient or off.
10. Liquid Line Valves (KMS & SRK) a) Erratic or open.
11. Termostatic Expansion Valve
(TXV)
a) Defective.
12. Headmaster (C.P.R.) a) Defective.
Long Freeze Cycle
1. Evaporator a) Scaled up, dirty.
2. Float Switch
See"IV.D.FloatSwitchCheck
andCleaning"
a) Scaled up, dirty.
b) Float sticking.
c) Defective switch.
3. Inlet Water Valve a) Leaking by.
4. Hot Gas Valves (KMS & SRK) a) Erratic or open.
5. Condenser a) Clogged.
6. Control Board
See "IV.B.ControlBoardCheck"
a) Float switch connection loose (K5).
b) Defective.
7. Refrigerant Charge a) Low.
8. Thermostatic Expansion Valve
(TXV)
a) Bulb loose.
b) Defective.
9. Compressor a) Inefficient or off.
10. Pump Motor a) RPM too slow.
11. Liquid Line Valves (KMS & SRK) a) Erratic or closed.
12. Headmaster (C.P.R.) a) Not bypassing.