What Fault Error is showing in the remote panel? It sounds as if you have a loose wire and if that is the case it would show "Internal Fault - Error 1"
There should be a small green led light on the bottom the Inverter and it should blink about ever 5 seconds, if it is not blinking there is a very small reset button next to it. Push that reset button a few times and hold it in until the light begins to blink. That will reset the Inverter. You will hear it reset itself as the light begins flashing. You may need to do it a second time if it re-trips.
There is a Factory Certified Tech for the Magnum Inverter in Washington, NC and he works the east coast of the US, his number is 858-204-8878 and his business name is Techmaster Marine.
I highly recommend him for service on the Magnum Inverters.
