We have a 10 kw Kabota on our 2002 U320 and during our recent stay at a Flying J for the night we turned the generator on to run the ACs due to temp in the bed room. The front AC unit started and ran fine but the rear (zone 2) did not turn on. I changed "Modes" several times from 1 to 2 and zone 2 would not start and run. I presume that both AC units should run on...