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166240004
12/1/94
Rev 3/4/96
Trouble Probable Cause Remedy
COMPRESSOR RUNS BUT
DOES NOT COOL, CIRCUIT
BOARD INDICATOR LIGHTS
“ON”
A. Low charge. A. Leak check – Recharge.
B. Hot gas solenoid leaking. B. Replace.
C. Defective expansion valve. C. Replace.
D. Inefficient compressor. D. Replace.
E. Internal by-pass open,
compressor noisy.
E. Permit pressures to equalize.
CUBER REMAINS IN THE
FREEZE CYCLE
A. Check suction line thermistor
(sensor) lead wire connection
at the circuit board.
A. Tighten, reattach.
B. Evaporator thermistor shorted. B. Replace.
C. Check thermistor (1K ohm). C. Replace if out of range.
D. Ice bridge setting too low. D. Adjust per bridge adjustment
instructions.
E. Expansion valve failure (will
not pull down).
E. Tighten bulb, replace as needed.
See check-out procedure.
CUBER REMAINS IN THE
HARVEST CYCLE
SUCTION LINE THERMISTOR
OPEN (STARTS IN HARVEST)
A. Loose connection at the circuit
board.
A. Tighten or reconnect.
B. Test thermistor. B. Replace if out of range.
PROXIMITY SWITCH LIGHT
“OUT”
C. Loose wire connection at
circuit board.
C. Tighten, reattach wire.
D. Proximity switch defective, see
check-out procedure.
D. Replace as needed.
E. Water curtain stuck, curtain
frozen to ice on evaporator.
Curtain hung on water pan,
proximity switch out of range.
E. Check and adjust as needed.
PROXIMITY SWITCH LIGHT “ON”
F. Circuit board failure. Check
voltage output.
F. Replace as needed.
G. Ice weight too light. G. Adjust bridge per Bridge
Adjustment instructions.
H. Potentiometer set too high. H. Adjust bridge per Bridge
Adjustment instructions.
I. Water curtain stuck, curtain
frozen to ice on evaporator.
Curtain hung on water pan,
proximity switch out of range.
I. Check and adjust as needed.