Mitsubishi heavy pc board fault

[Putte]

Hi

I have a Mitsubishi daiya (heavy) system with a transmission failure fault (6 blinks in indoor unit). Outdoor unit is SRC-35ZD-S and indoor is SRK35ZD-S. The outdoor fan runs but not compressor. I beleive the outdoor pc board is faulty but have found some info that it could be the indoor or outdoor board that is faulty. Any idea how i can be sure?

Thanks

[RIK-MAY]

If you have another unit the same you could swap the boards one at a time.

[Putte]

Not an option unfortunatly, unit is only one at a private house, but thanks.

[Putte]

Not an option unfortunatly, unit is only one at a private house, but thanks.