this article was on the N412.. without knowing your model, this is the best I can find...
The "n" code can mean a number of things, including inadequate circulation of air to the fins and thermister that hangs off the fins. (This may have been our problem, as the top shelf was packed full.) Other causes are listed in the manual. Here's a link to the manual, which you may want to print off and add to your book. http://bryantrv.com/docs2/docs/n5051.pdf
The manual describes two ways to reset the board. One is very involved, removing lots of wires and using a jumper. Not the way an average person would like to attempt, as a wrong move could "fry" the board. The second method restarts modern boards through a series of steps on the control panel. That's what Paul used, so we could try the refrigerator on A/C mode. Directions are on page 56, Screen 6, Erase Fault Data History.
This fault can be caused by a number of things, including wasps' nests, dirty burner, etc. All of these will need to be checked on ours, however, at least for now we're running on A/C power and the food (and beer!) will stay cold.
Other links to read: http://www.justanswer.com/rv-motorho...er-locked.html