Excess refrigerant

Shortage of refrigerant

Oil bubbles in sight glass

Nitrogen trapped in system

No cooling

Water warms in chillier

Water freezes in chillier

Excess of heat transfer

Thermostat control

Low pressure cut out

Oil pressure cut out

High pressure cut out

Silent operation

Excess of wear and tear

Less noise and vibration

Less power consumption

Replace oil pump

Add oil to crankcase

Replace oil pressure gauge

Replace oil pressure cut out