Small update from me. I discussed the solution with Jeff via Mail and I will get a new cable which will run from the drivers to channel 3 on the typhon controller. That way I will be able to reduce the fan speed the same way I reduce e.g. the light channel intensity.
I will try and find a best possible solution between heat and fan noise. I still believe that the fan constantly runs at top speed and somehow the throttle is not working, however this can not clearly be identified as an manufactoring mistake.
I think that the new solution is the best way and hopefully it works as intended. Shipping will take some days until it arrives here in Germany, but I will keep you posted.
Also I want to thank Jeff
@StevesLEDs personally for the very quick help and good and uncomplicated solution. He even made me 2 videos in his lunch break to guide me how to set up the new cable! Awesome
Alex