I had my wall connector installed with on a 240v 80/100 and set the dip switches for 40 amp output. Originally when it was put in it was pumping out the 40 amps and I was getting about 30 mph. But now it is only putting out 30 amps and I'm getting about 22 mph. Has this happened to anyone else? Any ideas why this has happened and what the fix might be?