Arrived at location on 6/29/22 - Checked over unit, found all controls unresponsive, opened up and found no voltage at terminal block. Found unplugged. Plugged in and breaker immediately tripped. Unplugged and reset breaker. Used meter and found hot and neutral shorted to ground, made further inspection of wiring. Found one wire with damaged insulation had shorted directly to the frame. Cut back damaged portion of wire and spliced together with ceramic wire nut. Checked with meter and verified that nothing is shorted to ground, plugged back in, breaker didn’t trip. Turned on unit and allowed to heat up. Found no other problems, confirmed unit working correctly at this time.