If the control unit for the AC has been replaced or a new actuator for the temperature flap has been installed, a basic setting of the AC must be performed. At basic setting the control unit learns the actuators' end-positions and calculates a new value for the fresh air fan.
At basic setting for the "comfort" version, the displays on the control panel turn off and the "ECON"-button flashes on the "basic" version.
Test condition:
Battery voltage above 11.5 V.
Ignition on, engine off.
No faults in the system.
Procedure:
Select the function: "air conditioning", press "OK".
Basic setting is performed and is done when the display on the control panel lights up again, for the "comfort" version. On the "basic" version, the ECON-button stops flashing.
Wait for approx. 20 seconds (new values are being stored).
Exit the function.
Turn off and on the ignition, wait approx. 15 seconds for any fault codes to be stored.
Establish communication with the car and check that no fault codes are stored.
If the function fails, check the test conditions and repair any faults.