Hello turners, this morning I was turning a dried Red Oak bowl turning at 1200 RPM and had a bad catch that stopped the bowl dead still in that the bowl was binned by the bowl gouge and cut a big chunk out of the bowl. As I was quickly removed the tool from the bowl and tool rest I noticed the lathe was not spinning at all. The digital rpm readout said error. I turned the lathe off quickly even though it was not spinning. I turned the power switch back on and nothing happened. Next, I unplugged the lathe for 15 minuets maybe to electronically reset the lathe. I then turned the switch back on and nothing happened again. The 1640 does not have a red reset button on the motor. I took off a small plastic cover off the inverter box and there were three very small switch which I flipped up and back down. Installed the cover and turned the lathe back on. The lathe started running at half the power. The belt is on the second pulley which is high power ( 40 to 3200 RPM ) and at max setting the motor was only producing 1250 RPM rather than 3200 RPM. Any ideas what may be the problem?