Are the cuffs v1.045 through v1.05.07?
If so, there is a bug that prevents the "reset alarm" button from appearing when the cuffs are locked.
To solve the problem, either:
1) Update the cuffs to v1.06 and above (when available).
2) Unlock the cuffs first, then say "/1c" to get a fresh menu. The "reset alarm" button should now appear.