Blowing OPC fuse on my B3030, I have checked all the switches, but I don't have a wiring diagram. Is their a way to jumper the OPC controller to test it? This it an interment problem. The wiring looks good, no bare wires. When a fuse blows and is replaced it may last a week or might blow in an hour. I have tried a 10 amp instead of the 5 amp, no difference. Help?