Table of Contents
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Product name and model......................................................................................................................................................... 1
Specifications............................................................................................................................................................................. 1
Appearance and dimension..................................................................................................................................................... 1
Function and button definition................................................................................................................................................. 2
◆Function summary............................................................................................................................................................. 2
◆Function area distribution................................................................................................................................................. 2
◆Button definition................................................................................................................................................................. 2
Installation................................................................................................................................................................................... 3
General operations.................................................................................................................................................................... 3
◆Switch E-bike system ON/OFF........................................................................................................................................3
◆Display interface.................................................................................................................................................................3
◆Switch push-assistance mode ON/OFF......................................................................................................................... 4
◆Switch lighting ON/OFF.................................................................................................................................................... 4
◆Assist level selection......................................................................................................................................................... 5
◆Battery indicator................................................................................................................................................................. 5
◆Error code indication......................................................................................................................................................... 6
General Settings........................................................................................................................................................................ 6
◆Trip distance clearance.................................................................................................................................................... 6
◆Backlight brightness.......................................................................................................................................................... 7
◆Toggle the unit KM/miles..................................................................................................................................................7
General parameters information............................................................................................................................................. 8
◆Wheel diameter information.............................................................................................................................................8
◆Speed limit information..................................................................................................................................................... 8
◆Battery power bar settings............................................................................................................................................. 10
◆Assist level settings......................................................................................................................................................... 10
Assist level mode options settings............................................................................................................................... 10
Assist level ratio information......................................................................................................................................... 11
◆Controller over-current cut information(optional)...................................................................................................... 11
◆Power assist sensor information (optional)................................................................................................................ 12
PAS direction information.............................................................................................................................................. 12
PAS sensitivity information............................................................................................................................................12
PAS magnet quantity information.................................................................................................................................13
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Do you have a question about the KD21C and is the answer not in the manual?
Questions and answers
How to reset total mile on display
The total miles on the Key-Disp KD21C display cannot be reset. The trip counter can be reset by pressing and holding the plus (+) and minus (-) buttons, selecting "Y" for yes, and then holding the power button, but the total miles always remain on the bike.
This answer is automatically generated
How to reset total miles on display
The total miles (odometer) on the Key-Disp KD21C display cannot be reset. Only the trip counter can be reset by pressing and holding the plus (+) and minus (-) buttons, then selecting "Y" for yes, and confirming by holding the power button.
This answer is automatically generated