Thanks for your support! We have not really done any promotion for this product and it's already selling quite well so we appreciate it.
I would just ignor that error. The new firmware and your current PCB board also has the ability to display the temperature of the beer inside the can/bottle. In order to use this feature you have to purchase a separate instant read thermometer that clips onto the filling tube. You will have to probably drill a hole in the housing of the case which is quite easy to do.
The reason we started to use this instant read thermometer is that we felt that most issues people will have with foaming beer when filling cans/bottles is due to the temperature being too warm. As a result we thought it would be good to have a thermometer that you can plug into the
RAPT Can and Bottle Filler so the temperature of the beer is displayed on the screen (and also reported to the RAPT portal too as this helps our customer service team troubleshoot problems).
We were not going to publicly talk about this feature until we did a video on the product but seeing as you have raised this issue I may as well give you the explanation. The fact that you do not have a temp probe installed is the reason for your error in the diagnostics. I am surprised you look in that area as most customers never look at the diagnostics screen.