Lights going out, but other power remains on
We are at a campground and plugged into the 30amp service. The past 2 nights we will be watching tv and suddenly the lights will go out. We hear the carbon monoxide detector beep as it does when you use the battery disconnect switch. The tv and other power remains on. The light in the refrigerator goes out. After about 20 seconds the lights come back on. This has happened 3 or 4 times both nights. Had wondered if it had something to do with the heater cycling, but that is not it. Any suggestions or ideas?
We have a Forest River, Sunseeker 2860DS.