To remove or replace a PIR alarm sensor, first you need to remove sensor lid (normally requiring unscrewing a single screw) and plastic lens cover i
To remove or replace a PIR alarm sensor, first you need to remove sensor lid (normally requiring unscrewing a single screw) and plastic lens cover inside (if present). N.B. this will set the alarm off. To silence alarm, enter 4 digit code (a tamper message should appear).
Once inside the sensor you need to loosen the screw securing the circuit board.
Please note – you need to make sure that the positive / negative power wires don’t touch – as this will short the alarm, blowing a fuse.
To fully remove the sensor you then need to unscrew the backplate from the wall and remove the wire. Do the reverse to re-fit.
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