The main switch---wall plug air conditioner---air conditioner air conditioner? Or the main open - - air conditioning open
---- wall plug open
Machine room air conditioning must be a separate line, if it is parallel to the jump in power is the problem of the wall plug you disconnect the wall plug open
Check the line there is no miswiring, short-circuit, leakage, wrong phase, put the insulation test
Check the line there is no miswiring, short-circuit, leakage, wrong phase, the insulation test