I've never heard of an "unlevel" alarm - but I do learn new things occasionally.....
As Wolfe mentioned, I have had my leveler system alarm go off while driving down the road when they were low on fluid. Stopped several times to check the levelers and they were always up where they belonged. Finally checked the fluid level. At first I didn't think that's what it was because at most, I would only be able to get another 1/4" of fluid in there. Since I had it, I put some in and the alarm quit. Hasn't gone off since.
Bill