Help with removing a pir on a Honeywell ascents g4 please

[Kimblediy]

Hi, can anyone please help - my son has just bought his first house and needs to remove 3 of the PIR's in order to have the ceilings replastered but none of us can find any reference to how to do this in either the user manual or the engineer's manual. Everything we try just sets off the alarm. Any help would be much appreciated. Thank you.

 

[Alarm]

You need to use the user code to silence the system when you take off the lid to the panel.

Or put in the engineers code first.
Locate the pir cables and remove the power pair.
Then take the pirs off the wall.
Either complete of WRITE down what colour goes where. Insulate (all cores individually) and decorate.

When finished do the reverse.

During this time the alarm will not be usable.

Or do you want the harder way to keep things running?