- Defective compressor or contactors: Test and replace.
- Reversal of condenser motor rotation - Check and correct.
- Insufficient thermal load.
- Check design conditions.
- Overload or overheating of the compressor motor:
Check the performance of the protection devices.
Check voltage or lack of phase. Fix problem.
Check adjustment of the expansion valve.
Check temperature (or pressure) at suction and condensation.
