I have a citadel XR2, which I have replaced the backup battery, and now the alarm is constantly ringing both outside and at the keypad.
The keypad will not take the code to turn the alarm off.
I have checked the fuses with a tester and they are fine.

is there anything else I can do, before the neighbours start to complain?

LesB, March 2016

may seem obvious have you wired the battery properly ?

gts, March 2016

what lights are lit on the keypad ?

gts, March 2016