Thanks for this info! I blacklisted the cdc-acm module.
I changed the logging interval from the heatpump. Before I had thermiq I wanted to see at least some history so I “doubled” what the Thermia LCD showed me by changing it there. So it really should not have had anything to do with Thermiq, but it was something I did and after that I managed to get it connected. No idea if these are related in any way.
After chmod 0666 check_install recognized the thermiq board. Some other issues still remain.