Error codes for old climate

Hello.
I have a problem with my automatic climate control, actually with the air distribution in the car. The vacuum cans behind the climate display do not work, i.e. everything just works the adjustment from above and down to the middle does not work. Now I have a lot to learn how to determine the error codes in the old climate via a key combination on the display but already two VAG partners have capitulated in the translation of the error codes. Did anyone of you have the code list???
Greetings and thanks Ralf