Robert,
From your statement in your opening comment, The inverter remote was seeing 120 volts momentarily and then NOT which makes it come out of standby and go into "inverter mode". Then the remote sensed "overload". From all that, I would start by taking the inverter/converter out of the loop. Unplug the coach, Go to the circuit breaker box in the closet and turn off the 30 amp circuit breaker for the inverter/converter. Plug the coach into shore power and see if you have 120 volts coming into it. If no power inside, your issue is now narrowed down to the 120 volt source, your power cord or your "transfer relay". If you do have 120 volts inside the coach (except the circuits the inverter/converter power up) your issue is in the inverter/converter or circuit breakers that are downstream of the inverter/converter. Fred