Accenta G4 external box chirps

[Marnhullman]

My Accenta security alarm has two external boxes - one at the front and one at the rear of the house. The battery is only 2 years old and I have checked its condition and it's holding the charge.

Recently and again last night the box at the rear of the house started emitting a loud chirping sound. It's not the full alarm sound. On the first occasion there was a message on the keypad that read 'Landing' but I could find nothing wrong. The main G4 panel is located in the airing cupboard, which is on the landing. Last night there was no message but when I tried to silence the alarm by entering the alarm code the keypad displayed 'Programme 1'. I then disabled the alarm by isolating it at the mains and disconnecting the battery.

Grateful for any clues as to the cause.

Regards

 

[Handymanjo]

Chirping bell boxes are generally faulty.
Water ingression,faulty microswitch, low volts etc.

 

[sparkymarka]

Normally it’s due to the bellbox battery ! I’ve powered up old systems with these bellboxes and they have chirped

 

[Marnhullman]

Thanks. Will check out the bell box battery.