e57,
It's a 3 wire, no neutral. I am convinced it is the AC unit (Brand new Carrier) or the AFCI itself that is faulty. It wouldn't even stay set the first day, now it stays set but the unit still won't even attempt to start, no fan, no nothing. I told the GC today my circuit is ok, it's his unit. He called his service people to come and check it out.
