I'm having IBR communication issues with my 2015 GTR215. I just finished reinstalling the supercharger after having it rebuilt. Ski has been sitting for about 2 months with battery disconnected, but IBR worked fine before I removed the supercharger to be rebuilt. Thinking I knocked something loose when I was working on the supercharger, but can't find anything. It is throwing codes: U16A4, U16A5, and U0129. I did find a 30 amp fuse blown. Replaced the fuse and it blew again when the ski was started. The battery has a good charge and ski starts right up. Any suggestions on what to check?