Hi everyone, i'm new to this Pedelecs site but so far what i'm seeing is really good. My issue is i run a Kirby ebike 52volt 1500/2000watt converted bike. I'm on year 4 of this brilliant bike i built for leisure. During a ride out i experienced a loss of power so after a struggle home and investigation I realized my 40amp fuse had blown inside the battery case. Changed it it blew immediately, i was lucky enough to have a spare (from Kirby ebikes) controller which is a KT36/48zwsrcld 17amp . After connecting it up and pressing the throttle i now get "Motor position sensor fault" the wheel spins momentarily and then needs a power down and back on to do the same again. Any advice please..