My machine will power on and drive no problem, but I am having an issue when I put down the pad and try to run it. After about 5 to 10 seconds of running the pad stops spinning and I get error codes on the panel. I have a service manual for the BDI codes and the two i have gotten are "Burnish motor circuit shorted" and "Burnish motor over-current." I don't see much help on how to resolve this issue and the service manual says to correct fault condition. Does anyone have experience with this?