Just wondering if anyone out there has a digital copy of the edp-50 manual, hundreds of edp-70 resources out there, but the edp-50 is 3 phase to single phase so the termination is entirely different. Our unit is coming up with a zero reserve input voltage, and there are no marked terminals for the reserve input so we can't even give it a supply yet.
Hehe, that post was what brought me to this forum, but bosco isn't answering his private messages sadly Couldn't find any links to files or web addresses in the post, so I'm hanging on his return, thought I'd see if any others out there had em.
as i know reserve supply and main input rectifier is the same as well as the maintenance by-pass. just a wild guess with a bit of confidence i think you should connect the wire of reserve supply from mains input then connect it to transfer switch of the ups if you can locate the board.