When there is air in the refrigeration system

Condition: Air conditioning system does not function.

Refrigeration Vacuum System

NOTE: These gauge indications occur when the refrigeration system opens and the refrigerant is supplied without performing vacuum purging.


Probable Causes


Corrective Actions

• Pressure extremely high on both low and high pressure sides

• Low pressure piping too hot to touch

Air in refrigeration system

• Air in refrigeration system

• Insufficient vacuum purging

1. Check whether compressor oil dirty or insufficient

2. Evacuate air and supply new refrigerant

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