This is the first time since I've owned my 2007 Sundance 3200ES a continual beeping sound. I've heard this before when battery is low. But the beeping sound now will come on when on AC power is in control. No battery connected. It starts up after I have plugged in the camper and stays on. I last used the camper in August - no issues. How do i get the beeping sound to stop. Where is it coming from? Is it some carbon monoxide detector? Is it some LP detector? is a smoke alarm. Do I have to have DC power for it to stop? It seems odd to me that it comes on after a minute of AC power and won't stop beeping. It's not really a beep but an irritating sound that hurts your ears. Definitely something like a low battery warning. I need to get this fixed for the weekend.