Remote alarms chime every 24 hours

[gorman]

Why do all of my alarms chime and my security lights come on once a day at exactly the same time?  It sounds like 5 high tone followed by 5 low tones.  Not loud but very annoying.  This happens when my alarm system is not activated.

[dave w]

What system do you have?
Do you have AHP and CM15A?
If you unplug the console prior to the expected alarm, do the chimes and lights still go off?