I know that you said an electrician wired it but it wouldn't be the first time I've seen it done wrong. If they don't have the high voltage wire in the correct place on the disconnect it could cause all sorts of problems. Had a friend of mine with a LC-30 Okuma that got wired wrong blew all sorts of fuses and made a mess. Also could be not in Phase the best way to tell is find the contactor for the coolant pump power it on and push in the contactor check the rotation on the pump if it spins backward switch the two low voltage legs around. The rotation on the pump should be correct. These might solve your problem.