Hey guy's I was hoping there might be someone here who knows Samsung error codes.

I went out to a unit today that was not heating or cooling, it's indoor fed. There was no power going to the outdoor unit, I found power going into the main relay on the PCB but no power coming out. I've had sticky relays before so I figured it was stuck, and replaced the board. I'm still getting the same problem. On the outdoor PCB I'm getting no lights at all which on the fault code table says (no power / VDD NG).

I'm getting 1.6v on the comms wire.

Cheers

Tom