Carrier Streamline Scroll 69NT20-531-300 - Manual (Page 64)

5-5 T-309
CONDITION POSSIBLE CAUSE
REMEDY/
REFERENCE
SECTION
5.14 COMPRESSOR OPERATING IN REVERSE
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.
Incorrect wiring of compressor
Electrical Incorrect wiring of compressor contactor(s) Check Electrical
Incorrect wiring of current sensor
Check
5.15 ABNORMAL TEMPERATURES
Discharge temperature sensor drifting high Replace
Failed economizer, TXV or solenoid valve Replace
High discharge temperature Plugged economizer, TXV or solenoid valve Replace High discharge temperature
Loose or insufficiently clamped sensor Replace
Failed liquid injection solenoid valve Replace
Low suction temperature
Discharge temperature sensor drifting low Replace
Low suction temperature
Loose or insufficiently clamped sensor Replace
5.16 ABNORMAL CURRENTS
Unit reads abnormal currents Current sensor wiring Check