Replacing Securit 800L Battery

24 Mar 2017
Reaction score
United Kingdom

The battery in our Securit 800L was last replaced 6 years ago and our alarm has started to sound when not set. It gives a tamper warning. I suspect it might need a new battery.

My question is how can I open the case without the alarm sounding? Is there a code that I can enter into the keypad?

Many thanks,

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If you know the engineers code then that will silence the alarm when changing the battery.
If not then just open panel, enter user code to silence, swap out the battery and then reset the panel. Job done!
Many thanks for that The Pars. I entered engineer mode and it did the trick. I have ordered a basic new battery from Amazon.

If I leave the alarm in engineer mode will this prevent it from going off in the middle of the night?
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I have successfully replaced the battery. Last basic question I hope. How do I exit engineering mode?

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