Check Valves
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The check valves disconnect in different areas of the refrigerant circuit. Refer to REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a .
NOTE:
The illustrated check valve -3- is installed for example on a Audi Q7 e-tron. Refer to REFRIGERANT CIRCUIT 1234yf - 2 , REFRIGERANT CIRCUIT GENERAL INFORMATION R134a .
The check valves in the refrigerant circuit in the flow direction have a specified residual pressure (approximately 0.1 bar or 100 mbar (1.45 psi)). So that the refrigerant circuit can be completely evacuates (residual pressure less than 5 mbar (72.5 psi)) all electrically activated valves must be opened.
Depending on the version the flow direction can be marked using a sticker.