I have installed three Mitsi HI Inverter units in a domestic premises and all was fine. The customer has phoned and told me his RCD has blown on occasions but it cannot be pinned down to any one machine. Mitsubishi have told me that Inverter Air Conditioners naturally omit electrical noise down the earth wire and this is why his RCD keeps blowing. The solution is to get a sparky to create a split load board and take the air con off the RCD.
Does this sound correct or am i been fobbed off a bit?