I bought and installed a Powermax PM3-35 several years ago. The trailer has done almost no camping since then, and has mostly sat in my driveway (powered and using the PM3), or at its storage site (completely unpowered).
I also have not had a battery installed. I wasn't camping in it, and so didn't figure I needed a battery as long as I was only using shore power.
While camping two weeks ago, plugged into 30 amps/110VAC, the PM3 quit working. I still had full 110VAC througout the trailer, but none of hte 12V
worked. The 110VAC outlet that the PM3 was connected to tests out fine with a receptacle tester.
I've pulled the PM3, and have it on the bench. Using a neon tester and a receptacle tester, I can confirm I've got 110VAC going in, but there is no power across the 12V
lugs. Fan does not run (of course, if it doesn't convert any power, it won't heat up and trip the fan).
I'd like to try to fix this, because I have zero recollection of where I bought it, and no idea if I can find the original paperwork, and don't even remember if I bought it new or used. So, what should I do next to troubleshoot and potentially fix this?