I just found this on a post from a sailboat owners forum. Sounds like he had a very similar problem and found that it he fried the ac circuit board, but look at this comment from someone who was chatting with him after the problem was solved. It sounds like perhaps there might be a "shore power fuse" that I am missing?
Hi Rick, whew! Any explanation as to what caused the AC circuit board to fail? ... However, I am puzzled as to why your board failed. Your boat should have a fuse at the shore power socket and I believe the Freedom 2500 is protected at the front end of the AC input.
Terry and Rick,
C'mon, don't boards fail, and sometimes there don't have to be "reasons." I do like the rodents, though... Is anybody actually putting these huge boxes someplace where water would get to them???
The shorepower fuse is usually at the panel, which is downstream of the AC inlet AND the inverter output. Think about the way it's wired on the AC side: AC in, to Freedom, then to panel. And, yes, the Freedoms have circuit breakers built in.
Added - Terry, many older boats do not have fuses "behind" the incoming shorepower receptacle. Those fuses only serve to "protect" the wiring from the receptacle to the boat's electrical panel main AC breaker (or in this case, the Freedom inverter with it's built in internal transfer switch) and the wiring from it to the AC main panel breaker. That fuse is overkill, IMHO. Doesn't hurt to have it, though. I completely agree with you on the starting of the invert function, and with our Freedoms and our Links everything can be controlled manually, I like that setup, too.