Best thing you could do first is google and download the Cummins EC-30 manual. Winnebago did not include it with my coach so I assume you do not have it either. The EC30 will start the generator - when it is set to Auto - on one of three conditions - battery voltage, a call for AC from the thermostat or the loss of shore power. You need to program the parameters for the EC30 to start and stop as detailed in the manual.
It should not start the generator if the coach is connected to shore power and it has been properly wired. Winnebago wires a sense lead to an AC power circuit in your coach to insure it doesn't start with shore power present. You might want to make sure all of your AC breakers are on in case the sense lead is fed through one of the circuits that is off. If that doesn't fix the problem, you will likely need to call Winnebago to determine where the sense circuit (often a 12+v door bell transformer) is connected in your coach. Your problem sounds to be with the sense circuit that is not telling the EC30 that you have shore power. Good luck,
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Bob
09 Journey 39Z
Southern Ontario
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