Re: Mitsubishi Mr. Slim MXZ-3B30NA
I am getting there slow but surely… Service manual troubleshooting flow chart stats,
1) Check power Supply. Yes 223 volts…
2) is the output from the noise filter P.C. board 208/230. YES 243
3) Is the input voltage to the power board 208/230. ? I can’t locate the correct terminals to check it.
4) Is the input voltage to the outdoor electronic P.C. board 294/325 V.D.C. YES 323 V.D.C.
5) If there is input voltage to the Electronic control P.C. Board. Replace it..

I have to assume (yes I know about assume) that the Electronic Control P.C. Board is bad. Even though I could not validate input voltage to the Power Board, I believe that if it was bad then then I would have no power to the Electronic ontrol P.C. Board..
So All that being said What are the terminal numbers for the Power Board Input. And How can I check the 24 volts power source, what component (terminal numbers and board name) If you are familiar with the Mits. Split systems, please review my findings before I go and spend a lot of cash on a new P.C. board .
Thanks I appreciate your time
Woody