Atwood Levelegs

Atwood Levelegs on my 07 Discovery. I had all 4 jack legs welded for safety. No problems since. Not the best levelers but they have been working fine for me. Just need to gentle with them. No excessive slopes.
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By now you have already turned off the ignition key.
All you really needed to do was press the off button, and this would stop the alarm.
Press the on button again. Press 2 adjacent jack buttons (moves that corner jack), along with ret. the jack should move. do this to the remaining. Now you can press retrack all

I have had this exact problem more than once... When the control panel does not see a current path because the motor brushes are so dirty no current can pass through them you will get an error situation. This guy provides good pix on how to fix. Once they get 10+ years old, you can be sure you have this issue.
http://www.irv2.com/forums/f258/diy-atwood-levelegs-motor-cleaning-399827.html

This maybe of some help.
Levellegs