Interesting thread. I recall on a few occasions leaving the 2-person Flight Deck of an A330, trotting to the rear of the aircraft (QRH in hand) and pulling a whole raft of c-b's. Then re-setting the pesky things after a suitable time. OK, it was a procedure for when the lavs stopped flushing, not a good event with 5 hours over-water remaining and 320 pax.
I wonder how that approved procedure would have been defensible if the single pilot then had to deal with a major problem, with no easy way of the other pilot being informed and returning to his/her post.