Electrical problems - not fun.
Since the AC comes on when you're on shore power, that tells you it's not a breaker in that's going to be in the regular circuit breaker box.
Since you're not getting power when on the genset, you'll have to trace it up between there and the transfer switch. Many generators have two A/C outputs. If yours is one of those, you will likely see two circuit breakers on the generator set itself. You can trip one, and not the other. Try flipping both to the OFF position, and then flip them back on. I have had one tripped and it didn't "look" tripped.
If it still doesn't come back on, you may have an issue with the power management panel (if you have one). We had a 2005 Fleetwood Excursion, and it would do load shedding when on less than 50 amp power. You potentially could have issues there.
If you're not where you have access to a mechanic (or just not ready to go there, here's a last desparate measure. Turn everything off, hit the chassis and house battery disconnects, and then go DISCONNECT the negative terminal on both sets of batteries so everything is truly dead. Give it a minute or so, and then reconnect it. If you've got a flaky relay in there somewhere, or possibly some energized switch that may not have reset correctly, this *may* get you back on the right track.
While it shouldn't matter, you could check and make sure the breakers aren't tripped on your inverter either. Wouldn't think this would be involved, but we had some massive electrical problems last year that ended up being an issue with the inverter being turned on manually in the bay instead of being controlled by the switch in the coach as well as a few other contributing factors.
Let us know what works for you when you figure it out.
Cliff
