Replace oil pump

Add oil to crankcase

Replace oil pressure gauge

Replace oil pressure cut out

Add water to brine

Add glycol to brine

Reduce concentration

Increase salt concentration

Moisture in oil

Dirty drier filter

Low pressure of oil

Liquid refrigerant in oil

Suction pressure rises

Discharge pressure decreases

Compressor oil level falls down

Compressor oil level increases

High oil level

Liquid refrigerant entry

Shortage of refrigerant

Air entered into system