Many thanks for your comment but not being a air con engineer or electrician I needed to be sure of my facts before chasing him up or getting another engineer to put it right
I have had a gree air conditioner split unit fitted downstairs and the electrics were taken from a wall socket.
Must there be an indoor spur socket between the wall socket and the electrical feed to the unit, because the upstairs unit has one fitted.
He told me there is an isolated switch on...