You can run the A/C but you can't run the WFCO converter,
And the breaker does not trip ?
You need to try a portable generator plugged into shore cord for testing and comparison purposes
NOT SHORE POWER. ...You need to test with limited power so as to not burn down the RV
What else is on that circuit
One breaker on generator supplies whole RV except a/C
Other breaker on generator supplies only the A/C
Sounds to me like you are trying to run wh..fridge..And converter at same time, batteries are low or bad too much power draw for that circuit from.generator
