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Problem
[3] Cool down
does not start.
(compressor)
(continued)
[4] Cool down starts,
but temperature
does not drop.
[5] Cool down
achieved,
compressor
continues.
Possible Cause
e) Refrigerators and
2-Section Freezer
External Compressor
Overload;
1-Section Freezer
Internal Compressor
Overload
f) Compressor
a) Location of Unit
b) Cabinet Temperature too
High
c) Setpoint
d) Door
e) Clogged Filter/Condenser 1. Clogged filter or condenser
f) Evaporator
g) Evaporator Fan Motor
h) Control Module
i) Refrigerant/Refrigerant
Lines
j) Compressor
a) Control Module
1. Defective.
2. Open due to clogged filter or
condenser coil.
3. Open due to condenser fan
not operating.
1. Defective.
1. Air flow to condenser
restricted or ambient
temperature too high.
1. Warm food recently placed in
cabinet area.
2. Air flow blocked.
1. Incorrect.
1. Left open or opened too
often.
2. Not sealing.
coil.
1. Clogged or frozen.
1. Defective.
2. Door switch defective.
3. Door switch relay defective.
1. Defective.
1. Gas leaks.
2. Refrigerant lines restricted.
1. Defective.
1. Defective.
31
Remedy
1. Let compressor cool and allow
overload to reset.
If overload does not reset:
Refrigerator - replace the
overload.
Freezer - replace the
compressor.
Once the overload resets, check
compressor amperage and
operating voltage.
2. Clean filter and condenser coil.
3. Replace condenser fan.
1. Replace.
1. Increase ventilation or lower
ambient temperature.
1. Pre-cool food product or allow
time for unit to return to normal
setpoint temperature.
2. Remove blockage or redistribute
food products.
1. Correct setpoint. See "II.C.2.a)
Default Settings."
1. Close. Check for door open
at time of warm cabinet
temperature.
2. Check for proper sealing.
Replace gasket.
1. Clean filter and condenser coil.
1. Clean. Defrost and check defrost
cycle.
1. Replace.
2. Check for continuity and replace.
3. See chart "1.[2]b) Door Switch
Relay."
1. See "IV.B. Control Module
Check."
1. Check for leaks with a leak
detector. Recover refrigerant
and repair leaks. Replace drier,
evacuate, and recharge. See
"V.A. Service for Refrigerant
Lines."
2. Recover, repair, replace drier,
evacuate, and recharge. See
"V.A. Service for Refrigerant
Lines."
1. Replace.
1. See "IV.B. Control Module
Check."
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