K0976_ug 6270 Honeywell Touch Screen Alarm Keypad User Guide. 😆 Render completed on 02/08/22 at 17. The ready light not coming on, and the "02" on the keypad is telling you the alarm thinks the window isn't closed. The 315-080 and the FACP communicate over a 2-wire serial interface employing the Repeater-Bus communication.