Check Valves

The check valves disconnect in different areas of the refrigerant circuit.

Fig 1: Exploded View Of Check Valve

Courtesy of AUDI OF AMERICA, LLC

NOTE:

For example, the illustrated check valve -3- is installed on an Audi Q7 e-tron.

The check valves in the refrigerant circuit in the flow direction have a specified residual pressure, approximately 0.1 bar or 100 mbar (1.5 psi). So that the refrigerant circuit can be completely evacuates (residual pressure less than 5 mbar (0.10 psi)) all electrically activated valves must be opened.

Depending on the version the flow direction can be marked using a sticker.