f4 is not a fault code that i know on the scantronic 9800 ive looked through the manuals and cant find it . could it be t4 = tamper on zone 4 the alarm will not work i this is the case. or it could be r4 but this would be a fault on keypad 4 but ive never been to a 9800 with 4 keypad on it before.
Chris AXIS Fire & Security, March 2007