I suspected the charger board wouldn't fix it. Nothing fixes it. Tried swapping parts from the new set. Same results.
I have to face the unpleasant conclusion that there is something wrong with my transformers. Don't see how. But there is nothing else in the mix.
So, going to take a left turn, pull out my hybrid inverter made from my other 15kw powerjack case and transformers with a new chinese inverter board, and rework it back to full powerjack with the second set from Sean. Now that I have just tested these transformers. Here it is with the generic inverter installed.
I pulled it out, opened it, checked it, powered it up, let it run for awhile, checked voltage and frequency, then turned it off.
Commenced to remove the inverter board. Also removed bolts and plates from the 2 transformers in this unit. This one has two As3 transformers (about 3000w each). The 3 transformers in the other unit are As2 (2000w). I need to make some blocks to set the two transformers on like I did with the other transformers. Add a couple of fans on top of each xfmr. Pull the endplate and mod the output like I just did with the failed unit.
So with the second mainboard/control board set installed with these tested xfmrs, It either proves the other xfmrs bad or that something "else" is at fault. It pretty much
HAS to be the xfmrs at this point.
Work to do...