Tried to swap a panel battery on a Friday at 4:45 PM, whole system went into fire alarm mode

Was at a retail job site in Phoenix, customer wanted a quick battery swap on a DSC panel before the weekend. Opened it up, pulled the old battery, put the new one in, and the keypad started screaming fire. No one touched the smoke detectors. Turns out the backup battery had been dead so long the panel lost its programming. Sat there for an hour with the manual trying to re-enter zone assignments while the store manager glared at me. Anyone else ever have a panel memory dump on you from a simple battery change?

3 comments

3 Comments

jordanblack20d ago

Read on a forum that DSC panels can factory reset if voltage drops below 10V during swap.

lunag3020d ago

@jordanblack is that even a real thing or just homeowner lore at this point? I've swapped batteries in a couple of DSC panels before and never had a factory reset happen, voltage drops or not. Maybe it only matters if you're sitting there with a dying battery for like an hour with constant low voltage alarms going off. Idk, feels like one of those warnings that sounds scarier than it actually plays out in real life.

ray_campbell4620d ago

@lunag30 might be right in theory but missed the part where some older panel models have a tiny supercap instead of a proper memory backup, so the minute that battery dips below 10V it's dead lol.