It would be super helpful if anyone could actually post some background info on this problem. The only helpful comment so far was the original post. E...

I have 2 EG4 wallmount allweather batteries with it. The system is only about 3 months old, so I'd say both ...

@eg4eric Yes my ac guy confirmed it was the transformer but not sure if the problem is beyond that I just need to get the ODU Main Controller board. A...

Oops 290 volts

390 volts

Yes my ac guy looked at why its not coming on and he said he sees a burn spot on one of the transformer legs and it is soldered to the board and he sa...

What batteries do you have with your system? Did the errors recently start, or have they been happening since you installed the system?

If you need a main control board, I may be able to assist with that. Have you confirmed that the issue is with the main control board?

What voltage are getting on the DC input on the Mini Split?

Is it possible to get (RS-274-X, BOM, pick&place file) so i can have PCBway to build me a new circuit board as of right now that seems to be my on...

Whoops. Flexboss inverter, not 18 kPV if it makes a difference ...