That sounds like the white "speed limiter" wires are connected, or that the controller is operating as though they were, although I believe that works unloaded as well to restrict speed. I've tried that before, and those wires work that way. I think it is time to try a different controller, perhaps a KU63 with no meter at all. The three speed buttons on my LED meter don't work at all on my controller - probably just with PAS which I'm not using. Very weird behaviour. Peace out.