Anti-Theft Function

When entering a code number, the beep will stop for about six seconds if as many as 24 keypads have been pressed by mistake. If as many as 80 keypads are pressed by mistake, all functions of system will stop for thirty seconds.
After a lapse of thirty seconds, if as many as 8 keypads are pressed by mistake, all the functions will stop for thirty seconds once more and this action will be repeated until a fixed number or code number is correctly inputed.