Fault AC overld: this is what's showing on the inside display with shore power.
Fault bridge: with shore power off.
I have reset the magnum mms several times with same results any ideas?

Have you checked your batteries. Mine was making all kinds of sounds when one of the batteries took a crap. Also do you have a surge protector. The park power could be bad

Batteries are 3 months old and I'm on my housecshore power. Just confused with two different faults depending on shore power or batteries are connected.
I cut off shore power and disconnected + battery lead then reset the unit, no change

I would contact magnum. It is possible that the invertor is bad. Also did you purchase the batteries new. There are a lot of cases of buying a new trailer with old gabage batteries
Also go to your signature pge and put in what year make and model of your trailer to help us answer your questions
Thanks

I will try to call them thanks
Also test of signature

Signature is great. A Lot of people post on the forums with a question and No one has any idea of the trailer, motorhome etc that they are asking about

Sorry
By the way welcome to the forum. There is a great bunch of people here willing to help

Thank's for the help with both topics