how can i stop the green light flashing on the keypad on veritas 8?

my veritas 8 alarm system unset green button is continually flashing i have turned of by mains and the light remains on so the battery is not flat when i try to activate the alarm on departure its flashing zone one there doesnt seem to be anything wrong in zone one what can i do to stop the green light flashing to allow me to use the alartm