Oil level is low

Oil level is medium

Thermostat not working

Refrigerant charge normal

Discharge plenum is at top

Suction super heat is less

Suction gas not cooled

Undercharged system

Capacity of compressor will increase

Less wear and tear in compressor

Harmful to the compressor and motor

Increase the life of compressor

Winding open

Winding short

Motor belt removed

No load on the motor