During renovation the cabling to one of the PIR's was damaged and unreachable without much further work so I decided to just exclude this room from the alarm system and removed the PIR. It was on zone 1 so I disconnected the wires for the PIR to this zone in the control panel - leaving it empty. When I go to set the alarm now all red lights flash and a continuous loud bleeping which does not stop until I enter the code to turn off the alarm. Any suggestions would be appreciated. Thank you.