I have a flashing green light which I found out means battery needs changing
But I have tried & failed cos every time I take the cover off the main unit in my cupboard does it make the alarm go off.
Tried turning mains off to it that also makes it go off
So at a loss of how to change the battery
I wonder why it makes a noise when you take the cover off. Do you think it has anything to do with the need to stop people getting inside to disable the system?
You COULD try this:
http://bit.ly/1pbyKyO
It may be helpful to add the exact model of your alarm as well.
Anon
April 2016
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home alarm systems.