We can run both A/Cs on our generator.
If we trip breakers, the first thing we check is if the water heater is on electric.
On 30A shore power, one A/C and the water heater will trip a breaker.
On generator, two A/Cs and the water heater will trip the breaker.
We also have a 5500 and two 13,500 a/cs.
Ours doesn't shut itself off without a load, only a fault. Check the blinking light and refer to the manual.
Best of luck solving your problem.
2015 Jeep Willys Wrangler
2014 Fleetwood Bounder 33C
States camped: all but Hawaii
more than 1700 days on the road