Process to get in in main menu and you can set the speed mode and power mode reset the hours and keep unlock the main menu:
1. Press and hold buttons B and D simultaneously for 2 seconds. A short beep should sound both at the beginning of the 2 seconds and after 2 seconds has passed.
2. Press button C within 10 seconds. Another beep should sound. Repeat this by pressing button C once more within 10 seconds, hearing again a short beep.
3. Within 10 seconds, press and hold buttons B and D simultaneously for 2 seconds. Like before, a short beep sounds when B and D are first pressed, but now after 2 seconds, repeated short beeps sound. The administrator menu should be displayed.
