A/Cs 1999 SeaView work better on shore P

[baustin]

We were camping in extreme heat (100+ degrees) past 4 or 5 days connected to 50 Amp shore and would freeze us out when running both units if we chose. Started home on gen 50 Amp and both units appeared to run well and cool for 15 to 20 min, then shut down for 5 to 7 min and then start back up. They were not shutting down due to the thermostat settings because it was never that cool in the coach. Now, I' driving so I can't tell you exactly what was going on, but the fans and compressors shut down at the same time. I could not tell if or not they were staggering when they started. I don;t have 50 Amp hookup at home so can not check to see if it is something that would happen on SP and therefore is a new problem or if it is a problem with my gen power.
Any suggestions on how to troubleshoot.

[RJay]

This isn't a clear cut problem but you could start by looking at the transfer switch. It's usually located in the power bay. Take the cover off an see if anything looks suspicious.

[M&EM]

If the road you traveled was bumpy, that may result in a interruption at the thermo couple or relay within the ac unit. This has happened to me on certain highways with rough seams. At the time, I had a class C and smaller genny(4KW). The momentary drop out of the acs was enough to overload the genny and cause it to trip a breaker or just stall the genny. With present coach, I still get some drop out of the ac on very rough roads. The newer ac s have a time delay and don't stall out the gen. Eventually the ac restarts. Also check to see what else is running off the gen. Some generators put out 50 amps but not necessarily at 230 volts. Example, Onan5.5HGJAB specifies only 45.8 amps total. Both outputs are in phase so only 120v ac is available. One ac line may be at 20 amps and the other at 30. If the 20 or 30 amp line is also feeding other loads such as refer or water heater it could be under powering an ac or more likely to trip a breaker at the gen.

Marty