Pressure of air
Poor compression
Excess of refrigerant
Shortage of refrigerant
Decrease the belt vibration
Increase the belt tension
Increase the feathering
Decrease the belt tension
Compressor runs more time
Compressor runs less time
Performance remains the same
Performance increases
Nitrogen
Oxygen
Moisture
Non condensable gases
No pressure rise
More pressure drop
Less pressure drop
Medium pressure rise