Generac trips breaker when Air Cond is used

[SandcamperCA350]

I have an RV with an onboard Generac generator. The Air Conditioner works just fine when plugged into AC, but when I try to use Air Cond with generator, the 30amp breaker trips. No onther problems with generator. Could it be a bad breaker?

Thanks

[SandcamperCA350]

I have an RV with an onboard Generac generator. The Air Conditioner works just fine when plugged into AC, but when I try to use Air Cond with generator, the 30amp breaker trips. No onther problems with generator. Could it be a bad breaker?

Thanks

[shooter]

The gen is probably to small to run ( start ) the A/C.What is the amperage draw of the A/C unit at start up. It can be up to 10 times the running amperge.
You did not state what size generator or the btu rating and locked rotor current and running current rating of the A/C.
It is hard to trouble shoot with out detailed information.
The ratings can be found on the equipment data plates.