To “initialize” the unit you have to enter the Service mode
Hold RPM key down
Turn the Main Switch ON
SE 1 will appear on your display
Use the Time knob to scroll up to SE 2
Press the “Start Stop” button to enter this service function
Press the RPM key to initialize
It will momentarily display the time, temperature and RPM and return the display below
By doing this you have cleared ans Reset the memory.
The initialization is recommended as a first step to rid Error 6 and after installing a board.