Flushing Circuit Block Diagrams

NOTE:

The arrows in the following illustrations show the refrigerant flow direction during flushing (refrigerant flows in the opposite direction of flow when A/C system is in operation while flushing, therefore the high pressure side of the A/C service system is connected to the low pressure connection of the refrigerant circuit to the A/C compressor).

These block diagrams indicate a refrigerant circuit with restrictor and reservoir, and a refrigerant circuit with expansion valve, receiver/dryer and a second evaporator (optional equipment on certain vehicles).

Depending on the design of the A/C service station, check valves may be installed between the refrigerant circuit and the A/C service station (to guarantee the correct direction of refrigerant flow during flushing).

Flushing Circuit on Vehicles with High-Voltage System

Refrigerant Circuit with Restrictor and Reservoir. Refer to Refrigerant Circuit with Restrictor and Reservoir .

Refrigerant Circuit with Expansion Valve, Receiver/Dryer and Second Evaporator. Refer to Refrigerant Circuit with Expansion Valve, Receiver/Dryer and Second Evaporator .

Vehicles with High-Voltage System (without Additional A/C System Functions, for Example the Audi A3 e-tron, Audi Q5 hybrid etc.). Refer to Vehicles with High-Voltage System (without Additional A/C System Functions, for Example the Audi A3 e-tron, Audi Q5 hybrid etc.) .

Vehicles with High-Voltage System (with Additional A/C System Functions, such as Heat Pump Operation on Audi Q7 e-tron, for Example). Refer to Vehicles with High-Voltage System (with Additional A/C System Functions, such as Heat Pump Operation on Audi Q7 e-tron, for Example) .