Wow respect that you know all these details...thank you for the detailed information. Didn't know that the colors specified for what it is used. That is really helpful. So it should control something with heating or fresh air?! That narrows it down quite a lot. I am wondering what it does though because one of the lines was cut for quite some time and heating and everything still worked.
But thanks again. I will try to compare it to other European models and hopefully that will clear things up...