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5--5
T-334
CONDITION
POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.14 COMPRESSOR OPERATING IN REVERSE
NOTE
It is normal for the compressor to run in reverse for 15 seconds when the compressor has been off
for 6 hours or more.
CAUTION
Allowing the scroll compressor to operate in reverse for more than two minutes will result in internal
compressor damage. Turn the start-stop switch OFF immediately.
Electrical
Incorrect wiring of compressor
Check
Incorrect wiring of compressor contactor(s)
Incorrect wiring of current sensor
5.15 ABNORMAL TEMPERATURES
High discharge temperature
Discharge temperature sensor drifting high
Replace
Failed economizer, TXV or solenoid valve
Replace
Plugged economizer, TXV or solenoid valve
Replace
Loose or insufficiently clamped sensor
Replace
Low suction temperature
Discharge temperature sensor drifting low
Replace
Loose or insufficiently clamped sensor
Replace
Liquid injection valve failure
Replace
5.16 ABNORMAL CURRENTS
Unit reads abnormal currents
Current sensor wiring
Check
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