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Key Disp KD21C - Electric Bicycle Meter Manual

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Attached list 1：Error code definition
Attached list 2: Person ality Parameter setting
No Setting item Screen display
1BatteryPowerBarSetting
2 Power assistant level Setting
3 Over-current Cut Setting
4 Power Assistant Sensor Setting
5 Speed Sensor Setting
6 Throttle Function Setting
7SystemSetting
8 Power-on Password Setting
Attached lis t 3：Power assist table
Error Code Definition
21 Current Abnormality
22 Throttle Abnorm ality
23 Motor Abnormality
24 Motor Hall Signa l Abnormality
25 Brake Abnorm ality
30 Communication Abnormality
… 18


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  • After doing several adjustments to the KD21C display on my IGO Elite II Ebike the pedal assist function is not working. The throttle is. Submitted on 15-8-2023 at 15:05

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  • Can the bike move without having to peddle constantly Submitted on 3-8-2023 at 03:14

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  • Good morning my display is showing nothing any more but when I push on the powerbutton I still can ride electrical. When I release the powerbutton the electrical riding stop. I also have no front and back light Does any know what the problem is Submitted on 9-7-2022 at 10:26

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  • My ancheer bogs out on occasion. The KD21C display says "error code 23". I thought that would be helpful, but the manual actually doesn't have the error codes in it.... Does anyone know what error code 23 is? Submitted on 10-2-2022 at 23:48

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  • Hello, I have an electric bike model onebot t6f and when the displey starts and the motor does not work, I have already verified that it is the displey of the problem, I have restarted it and tried to configure it but I have not achieved anything. Also forget the password, there is a way to bring the password to its default value. Submitted on 23-9-2021 at 14:26

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    • Hi. I have the same problem whit the display. Please can you tell me how you fix it? Answered on 14-12-2021 at 15:39

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  • does this bike really ever shut off ? even when turned off the headlight and horn still are able to use ? Submitted on 1-9-2021 at 22:51

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  • bonjour, comment faire un reset display car moteur tourne toujours Submitted on 24-6-2021 at 12:59

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  • the battery power indicator is inaccurate. It shows an empty battery while the battery led and the recharger both display a full charge. Does the monitor need to be replaced or can it be reset
    Submitted on 18-10-2020 at 18:46

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    • I have the same problem . Just purchased the bike . Did you find any solution ? Answered on 5-6-2021 at 12:19

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  • The lag time between starting to peddle and power on is too great. Is there an adjustment for that? Also the throttle speed is very slow (1-2 mph). Is there a fix Submitted on 15-3-2020 at 17:07

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  • Hi! I cannot find the cruise control feature like I have on my other Sondors. Can you help me?
    I called and Tony told me I have a kd51u unit, not a kd51c.
    My s/n is: a1111 49v
    Thank you,
    John Carter
    612-867-4000 Submitted on 9-1-2018 at 23:27

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