Hi mgscott4,
Thank you for having posted the FW221 rev B document, this is going to be priceless since there is not a lot of information about this RV Battery Control Center. I have a Thor Axis 24.1 (2015) and there was no information at all about this BCC. I would be interested to know if your motorhome has also a Trombetta with a B.I.R.D? Mine does not seem to have any (I cannot locate them if I have any). PLease let me know,
Thnaks
Claude