Refrigerant Circuit, Charging With A/C Service Station

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The entire refrigerant charge can be added to either the high or low pressure side. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .

The work procedure is always to be performed as described in the operating instructions for the A/C service station.
Before adding the refrigerant, correct the quantity of refrigerant oil. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .
Make sure that the A/C Service Station is standing at the same level as the vehicle (maximum difference: 50 cm) when charging the refrigerant circuit. If the difference in height is large enough, the displayed and the actual amount of refrigerant added to the circuit may differ, depending on the version of the A/C Service Station. The filling accuracy of the A/C Service Station may change.

-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the appropriate Service Information and Infotainment/MMI Operating Information.

-- Switch off the ignition.

-- Evacuate the refrigerant circuit using the A/C service station. Refer to REFRIGERANT CIRCUIT, EVACUATING WITH A/C SERVICE STATION .

Also for vehicles with electrically operated valves in the refrigerant circuit that cannot be opened without current (for example the Audi Q7 e-tron):

NOTE:

For vehicles with a high-voltage system and additional A/C system functions ("heat pump operation" or "cooling the high-voltage battery"), valves may be installed in the refrigerant circuit that cannot be opened without current. These valves are opened and closed via stepper motors, for example, and are no longer activated after switching off the ignition. To completely discharge, correctly evacuate and charge the refrigerant circuit, no sections may be closed. Therefore these valves must be opened before performing this work. Refer to Refrigerant Circuit (vehicle-specific repair information) and use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

-- Open the electrically activated valves (not open without current) using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

All

-- Remove the hand wheel at the quick-release coupling adapter (to close it).

-- Allow an amount of refrigerant to flow into the charging hose.

-- Check the charging cylinder.

-- Install the hand wheel at the quick-release coupling adapter (to open it) and charge with the specified quantity of refrigerant.

-- Turn off the A/C service station.

Vehicle that has the discharging and charging of the refrigerant circuit scheduled in the maintenance schedule after a certain operating time

-- Enter the performed "A/C system re-charged" procedure into the maintenance schedule. Refer to the appropriate Maintenance Tables and / or "Maintenance" repair information.

NOTE:

Discharging and re-charging are only included as maintenance work in the maintenance schedule for certain vehicles (currently for the Audi Q7 e-tron and the Audi A6 e-tron, for example).