You need to enter "Add devices in zone 1" for 3 seconds and then press ESC, at which point you have approximately 40 seconds to reset the devices (by pressing and releasing the configuration button after 1 second, then press it again and don't release it the red configuration LED turns off. For devices 16935, 14485 and 20485, you do not need to release the button). When the 40 seconds has expired you need to repeat the whole procedure to continue resetting other devices. The only non-resettable device is the 01805 outdoor siren. Following a reset, the devices no longer work in the SAI system and change their internal address (it is therefore necessary to remove them from the area where they were configured as they will still be stored in the device list on the control unit with their old address).