Accenta 6 alarm sounding when trying to change light switch

[jordanlm5]

I am trying to change the light switches in the house I just bought. However when I turn off the circuit breaker for the radial lighting circuit, the Accenta 6 alarm goes off inside and outside the house. If I remove the fuse in the control panel in the loft then the indoor alarm goes quiet however the outdoor alarm / bell keeps sounding. I guess this is because it has an individual battery powering it. I'm guessing the back up battery in the control panel is dead therefore there's nothing to power the system in the event of a power cut and as a result the alarm outside sounds.
I have 2 options, replace the back up battery, or disconnect the outside bell alarm.
How would I disconnect this alarm? Just unscrew it and cut the wires?

 

[sparkymarka]

Battery is faulty OR battery charging resistor is burnt out , normally for these panels if not serviced regular

 

[sparkymarka]

You will need to get to the bellbox and disconnect the battery OR power it down and hope it cuts off after 20 mins

 

[jordanlm5]

You will need to get to the bellbox and disconnect the battery OR power it down and hope it cuts off after 20 mins

If I get up some ladders and remove the bellbox cover can I just cut the wires to stop it sounding in the event of a powercut? I don't need the alarm system therefore don't really wanna faf around replacing the back up battery

 

[jordanlm5]

You will need to get to the bellbox and disconnect the battery OR power it down and hope it cuts off after 20 mins

How long will the bell sound before the battery dies?

 

[jordanlm5]

Battery is faulty OR battery charging resistor is burnt out , normally for these panels if not serviced regular

Do you know if I buy a replacement back up battery, and remove the control panel cover and replace the battery, will I need an engineer's code or will my user code he sufficient?

 

[sparkymarka]

You can use your user code BUT check the pcb first …if the resistor is burnt out you are wasting your money on a new battery

 

[sparkymarka]

It’s a large resistor in this area like below