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scantronic 9200 alarm bell rings when mains fails?

when mains fails my external alarm bell rings continuously until mains restored How do i prvent this
bill, September 2011
Possibly :D

Alarm, September 2011
do you think it needs a battery ??????? :-)

gts, September 2011
alarm guy.

gts, September 2011
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Take your pick, or use the SEARCH facility here, christ are people really this thick now days?
Do you not search before asking a question~?

Alarm, September 2011
obvious ,to us anyway ,acorn

gts, September 2011
SD, don't you know?

acorn, September 2011
I would think that the internal battery has failed. replace it.

SD, September 2011
link Click here to see other fixes for Scantronic 9200.