Burchda RX20 Benutzerhandbuch Seite 28

YL-01, YL-02 Error codes
Each setting needs to be done with the bicycle stationary
The personalized parameter setting procedure is as follows
When the display is ON and the speed shows 0,
The following options are available in the personalized parameter setting interface:
01P refers to the backlight luminance setting, The adjustable range is :1-3 ,01 for the
minimum luminance, 02 for the standard luminance, 03 for the maximum luminance