Compressor protection starts with a knowledge of refrigerant-oil basics
The resultant reduction in compression ratio, calling for larger condensers and larger refrigerant charges, all point to the need to re-emphasize refrigerant control; one of the major causes of compressor failure is damage caused by liquid refrigerant entering the compressor in excessive quantities.
A well-designed, efficient compressor for refrigeration, air conditioning, and heat pump duty is primarily a vapor-moving pump designed to handle a reasonable quantity of liquid refrigerant and oil.