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Could well have been just our one then. Killing power at the CU and removing backup battery didn't stop it.
Stonehedge-
Could well have been just our one then. Killing power at the CU and removing backup battery didn't stop it.
Another battery in the siren? That's what happened with mine.
Battery inside the alarm unit was knackered so any time the power went off (power cut or when we had builders in to fix a leak in the bathroom) the indoor siren would go off (there's no external siren).
I replaced the battery in the main alarm box and that stopped it going off when the main power was cut.
Even with the instructions (found on the Internet) I couldn't ever get it back to normal again as I obviously wasn't doing the right thing to clear the tamper alarm (piezo-electric thing inside the alarm box) despite having put it in maintenance mode and back out again.
We never used it anyway so I left the internal siren disconnected and it's been left in maintenance mode for the last 3+ years.
Whenever we get the flat rewired we'll get it ripped out but for now it's relatively harmless.
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Usually that's the type that has a capacitor or battery in the siren as well as the control box. Not saying it's impossible to connect it direct to the grid but it would be pretty reckless since an 80amp connection could melt the entire control board and a fair bit of anyone stood near it.
Greenbank
Airhead
I'm not sure that an alarm could or should be wired before the consumer unit. It would need to have some kind of consumer unit/breaker itself to protect the circuit. Most of the alarms I've seen are connected via a fused spur from a separate breaker on the main consumer unit.