Congratulations on the 35UN. I picked up the 35UP a couple of months ago. Can be confusing what runs on battery, generator and land line. If you're only running the generator, and the inverter is turned on and showing proper range, main a/c should run. If it doesn't, first thing to check is the breakers on the generator itself. Pull the front panel off the generator and there will be 2 toggle switch breakers on the upper left. Make sure they are not tripped. The fridge, if set on Auto, should run off your propane, but only if the coach is level. If the fridge isn't level, it will run but it will not get cold.
Just a few of the mistakes I made when I got mine. Hope that helps.
Join the Precept Owners Group. That way we can figure it all out together http://www.jaycoowners.com/forums/gr...%27+group.html