How do I reset the filter lifespan after replacing the filters?

Enter the Filter Lifespan Setting mode by navigating through the system settings menu using the setting button. Once in filter lifespan setting mode, the display will show a pattern number (00/01/02/03) indicating remaining filter life, and you can press the increase or decrease button to reset the filter life back to '00'. When the filter lifespan is due, the buzzer will sound 3 times every six hours until the lifespan is reset. (Page 10)