Check Valves
WARNING: This page is about a different variant/trim than selected.
The check valves separate the refrigerant circuit in different areas.
NOTE:
For example, the illustrated check valve -3- is installed on an Audi Q7 e-tron.
The check valves in the refrigerant circuit have a specified residual pressure (approximately 0.1 bar (1.45 psi) or 100 mbar (1.45 psi)) in the flow direction. 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.