My daughter is out at her first campout with the new to us popup. I got a call from her and was told the power is not working. I had them plug the circuit analyzer into the 30a outlet and power showed to be good. However, camper would not work. Told them to try the 50a with a doggone with same result. Finally, had them plug into 15/20a with adapter and circuit analyzer, and they have power. Any ideas what is going on? Pic is of the circuit analyzer in use.