Power from the generator to the converter indicates that there's power to one side of the AC breaker box. A popped circuit breaker at the generator ir in the breaker box is one cause of this problem but no mention of the more probable cause has appeared.
From the initial description: "started generator - batteries charged ...." is an indication that the rig has an automatic transfer switch. If one side of the transfer switch failed, some AC devices would would have no power while others would work without problems. This sounds like exactly what's happened.
The inputs and outputs of the transfer switch should be checked. If there's no power at the input, a breaker at the generator or a broken wire between the generator and the transfer is the culprit unless the generator itself has failed, an unlikely occurrence. If there's power at the inputs and none at the outputs, it's the transfer switch; probably the contacts on the relay. If the outputs have power, then the problem lies between the transfer switch and the circuit breaker box, or in the circuit breaker box.
Circuit breakers do fail but it's a very unusual thing to happen in an RV because you rarely manually throw the breakers.
I am surprised that both air conditioners don't work though. They should be wired to different legs of the incoming power to the breaker box so I'd expect one of them to work if half of the transfer switch failed.
Whatever the problem is, it'll be easy to figure out with an AC voltmeter. There should be 120-130V between the neutral (white) and each leg of the power (red,black) wherever you check. Checking with both shore power and the generator will help isolate the problem. If you're not very comfortable working around 120VAC with meter probes, additional protection can be obtained by wearing a pair of insulatin protective gloves like the throwaway ones you use for handling the sewer hose.
Originally Posted by JimNichols
2014 Coachmen Mirada 29DSSE.
Doing some maintenance today. Realized I had left the main power on a couple of weeks ago. In Texas. Hot. Started Vehicle. Started Onan 5.5 K Generator from drivers seat. No problem.Batteries charged in 15-20 minutes.
Interior Lights work. Both slides work. Refrigerator works on house power. Neither A/U Unit will start. Power to both thermostats. Microwave has no power nor does either TV.
Checked all 110v and 12v breakers and fuses.