To restart the “controller or the system”.
Look for the PTI Falcon Enclosure. It is normally in the office or nearby. The staff member should have seen it around.
Open the case – there is an orange connector that you need to disconnect for about 10 - 15 seconds.
Then re-plug in the orange connector; the system will take roughly 1 minute to start up again.
Test the keypad(s) to check the system is back up and working normally.