Martin Brown wrote:
On 15/08/2019 11:44, gjb wrote:
We had a power cut last night for just over 1 hour. When we went to set the
alarm it does not work. The power light is lit on the panel and there is
a red
and green light on the power supply unit. Salamander Alarms Ltd say the
control panel has dropped out and an engineer will need to visit at a
cost of
£150. We are pensioners and that is a lot, can anyone help please

Chances are its backup battery has failed.

Most alarm systems can last for a while on their emergency battery
reserve and recover gracefully from a powercut. If they don't then you
probably do need a service visit (unless you happen to know the
engineers access code and dismantle sequence for the anti-tamper
features on the control panel). Get it wrong and the external bell and
maybe internal ones will panic by ringing until its battery runs out
(which may not be all that long if it has an ancient battery in too).

The external sounder will usually have its own batteries. These can run a
piezo-electric siren for bloody ages.

Tim

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Please don't feed the trolls