Carrier Transicold 69NT40-561-001, Operation And Service Manual, Page: 112 / 182

T-340 6–6
6.16 Abnormal Temperatures
High discharge temperature
Condenser coil dirty Section 7.10
Condenser fan rotating backwards
Section 7.11
Condenser fan inoperative Section 7.11
Refrigerant overcharge or non-condensibles
Section 7.3
Discharge service valve partially closed Open
Electronic expansion valve (EEV) control malfunction Replace
Failed suction pressure transducer (SPT) or evapora
-
tor pressure transducer (EPT)
Replace
Discharge temperature sensor drifting high Replace
Failed economizer expansion valve (EXV), econo -
mizer coil, or economizer solenoid valve (ESV)
Replace
Plugged economizer expansion valve (EXV), econo -
mizer coil, or economizer solenoid valve (ESV)
Replace
Loose or insufficiently clamped sensor Replace
6.17 Abnormal Currents
Unit reads abnormal currents Current sensor wiring Check
Condition Possible Cause Remedy / Reference