07-17-2026, 01:54 PM
A single chirp from the bellbox sounder every 10 seconds, this seems to occur after a battery test but continues long after the test is finished. There is a corresponding voltage drop pulse seen on the 12v supply, approximately 1v drop around 300mSec duration. I have isolated the supply to the PIRs and vibration sensors but the chirp remains. The voltage dip is still seen if the bellbox is disconnected.

