Check Valves
WARNING: This page is about a different car, the 2022 Volkswagen ID.4 and 2021 Volkswagen ID.4. However, it is still accessible from the selected car via links, so may be relevant.
The check valves disconnect in different areas of the refrigerant circuit. Refer to Refrigerant Circuit (vehicle-specific Service Information).
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 (0.07 psi)), all electrically activated valves must be opened.
Depending on the version, the flow direction may be marked with a sticker.