I powered the unit down, removed the mains fuse and disconnected the battery.
There are two spikey pins at the top of the board with the words ‘memory default’ and ‘Link 2’ next to them. Then two identical pins lower down the board with ‘Link 1’ below them.
Are either the default pins?
I have just moved into a house with the above alarm. Following a power cut the keypads are emitting a constant tone, which I cannot stop.
I have replaced the backup battery but still cannot stop the noise. The code will not work and I do not know what to do next, can anyone help?