Check Valve

The check valves disconnect in different areas of the refrigerant circuit. Refer to Refrigerant Circuit (vehicle-specific Service Information).

Fig 1: Exploded View Of Check Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

The illustrated check valve -3- is installed for example on a Audi Q7 e-tron. Refer to Refrigerant Circuit (vehicle-specific Service Information).

The check valves in the refrigerant circuit in the flow direction have a specified residual pressure (approximately 0.1 bar (1.45 psi) or 100 mbar (1.45 psi)). So that the refrigerant circuit can be completely evacuated (residual pressure less than 5 mbar (0.073 psi)), all electrically activated valves must be opened.

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