WHICH EMS (energy management system) do you have? I guess an Intellitec, but confirm. You stated the AC runs for a "few" seconds, blows cold and then system resets. CANNOT HAPPEN. The AC will NOT run for a "few" seconds and also blow cold air. NEVER. MOST AC units have at least a 2.5 minute delay before the compressor starts. It may be as little as 10 seconds on some models, but it will still take a few minutes for the system to generate cold air. The EMS system (Intellitec) just senses amp draw and the system just reads the 12 volt signal from the Genset to let the EMS know if shore or Genset. You really need a 120 volt reading of the Genset. Does the Genset skip or lug down when this problem happens? For the display to go off and back on would indicate a 12 volt problem. The EMS systems use 12 volts to power them up. Doug