Hi Al -
First thing I'd do is immediately call Monaco Tech-Support (877.466.6226, they're there 24/7) and ask them. Someone there should know what it means or who to contact if they don't. You might also give the Workhorse Chassis Hotline a call (sorry I don't have their number, it should be in the chassis-literature).
A lite and a beeper is definitely trying to get your attention for some reason.
Let us know how it goes, and if we can help in any other way.
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'06 HR Endeavor 40PAQ (Mission Hills decor). All options, but still finding more to add.