Compressor Oil Contamination

Unlike engine oil, no cleaning agent is added to the compressor oil. Even if the compressor runs for a long period of time (one season), the oil never becomes contaminated as long as there are no compressor malfunctions.

Inspect

^ For increased capacity of the oil.
^ For compressor oil color change to red.
^ For foreign substances, metal powder, etc. in the compressor oil.

If any of the above conditions exists, the oil is contaminated. Whenever contaminated compressor oil is discovered, the receiver/dryer must be replaced.