How to open the Citroen Sega internal cycle?

After Citroen Sega turns on the air conditioning system, it defaults to internal circulation mode. Pressing the cycle button will automatically turn off the internal cycle mode and turn on the external cycle mode. The specific operation steps are as follows:

First of all, step on the brake pedal of the car to the end to get ready for starting the engine.

Second, twist the car key in the key door, start the car engine and run at idle speed.

Thirdly, after the engine is started, the idling speed is about 10 minute, so that the water temperature in the car can be raised to the temperature under normal working conditions.

Fourth, turn the wind speed knob to increase the air volume.

5. Press the A/C key to start the air conditioning system, which is the default internal circulation mode.

6. Press the symbol similar to three small rotating arrows to open the outer circulation mode.