Running the AC and other normal RV appliances ( converter, fridge, etc) on a 15A breaker for any period of time is not a good idea . Individually they may be OK, but when all are demanding current ( running) at the same time, you can have an issue. Yes they will run, but it is possible to damage the compressor. Unplug from shore power for few minutes and reconnect to 30A and try again. Appears you had 30A service,( then did straight 30 amp into the 30 amp outlet) but not clear why you were not using it.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 65W solar panels