Stan:
Assuming your genset furnishes you with 30 amps, same as shore power, it appears you are overloading your system, You should only be able to run one A/C at a time. There are other things using electricity such as your converter/battery charger or inverter (whichever you have). your refrigerator, lights etc. You need to familiarize yourself with how much current everything uses. You shouldn't even be able to run your microwave with one A/C running. I know my A/C's use 15 amps each (I have a 50 amp unit), but with two A/C's running I could be pushing the limits if I also used the microwave. I am wondering if you are kicking circuit breakers off when you try to run two A/C's. A friend of mine has a different make motorhome and he has some kind of electrical panel that will only let one air run at a time.
When your rear air blows warm air, chances are there is not enough current available to run the compressor. There again, it seems a circuit breaker should pop.
Your owners manual should have a chart that tells you how much current everything uses.
Hope this helps.
Bob
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