I recently noticed my battery pack was at 1/3 while our 38CK was "in storage" on shore power. A check of the converter showed no output. The converter is a Progressive Dynamics Inteli-power PD9260C (60 amp). No it didn't come with my Cedar Creek. It's my converter of choice on several previous trailers.
My plan was to purchase a replacement and repair my old unit for a spare. Here's what I learned: Don't mount any converter where water can get on it. Mine was under the shower which I don't think leaked but, you never know. The schematic for the unit is proprietary, but a tech at Progressive Dynamics was a big help in suggesting what components failed. Mine blew the ceramic fuse in the primary stage. There are only a few components that can cause that. All components are marked and available from electronic supply houses and are only a few dollars each. With a multimeter, parts and a solder iron I should be good as new when I get around to it.
In considering sending my unit back for service, the tech said, from my description, they would have replaced the unit and billed me accordingly.
Now for the replacement unit I bought. Ordered it from Amazon. It came from a surplus company and it checks out fine. Problem is, no serial number hence no Progressive Dynamics warranty. A check on line shows a Q&A for the unit about warranty. The responder posted "new, factory warranty, w/serial #" but the responder was another Amazon supplier, not mine. Given the choice when ordering the same unit, I chose the least expensive supplier. I am not pleased that Amazon lumps together all comments and Q&A's for the same product. The Progressive Dynamics tech was adamant that I return it and get a refund and buy from an approved dealer.
Hope this helps somebody.
William & Sara
2012 Silverado 2500 HD DA
2014 Cedar Creek 38CK