On Sat, 18 Jul 2009 14:27:11 +0100, F news@nowhere wrote:

We've had a couple of power cuts recently (up to two hours) while we
were out and the alarm was set. Neighbours have said that the alarm has
gone off each time the power has come back on. While the power was off
none of the panel lights were lit and when the power came back on and we
reset it 'Day' and both zones were lit.

Is this expected behaviour?

I thought the battery in the control panel and the one in the bell box
were supposed to deal with power cuts. Could it be that one or both of
the batteries needs to be changed?

The alarm is a Scantronic 9448.

Probably not what you're seeing, but I once had a faulty PIR which false-triggered when its supply
voltage dropped slightly when the panel switched over to battery power. Took 2 Police callouts
before tracing this one....!