Hi there got a mitsubishi SRK 50 Hyper Inverter ZGX, Installed it 3 months ago working fine but for some reason now keeps triping the RCD all the wiring seams fine and dry, unit pulling correct current so decided to rewire it with out the RCD on seprated circut with 16A fuse box it runs fine on hot and cold any ideas way it is doing it??? got me lost could it be the rcd is just too sensitive