3Press Enter when “MANAGEMENT” appears on the lower line of the display.
4Press 
or 
until “M. CODE : xxxxx” is displayed.
5Select one between “1.DEL” and “2.CHANGE”.
6If you press 1, the master code is deleted.
If you press 2, the LCD prompts you to enter new master code.
7Enter new master code, and press Enter.
The LCD prompts you to enter the code again. Enter the code again.
8Press Enter, and the master code is changed. To return to Standby mode, press Stop/Clear.
