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Push-assistance function may only be used when pushing the
eBike. Danger of injury when the wheels of the eBike do not have
ground contact while using the push-assistance function.
◆Switching the Lighting On/Off
To switch on the display backlight and headlight of the eBike, hold
the UP button for 2s.
In the same way to hold the UP button for 2s again, the backlight
and the headlight will be switched off.
◆Assistance Level Selection
Assistance levels indicate the output power of the motor. The default
value is level "1".
The default power ranges from level "0" to level "5".The output power
is zero on Level "0". Level "1" is the minimum power. Level "5" is the
maximum power. Gear to level "5" and then press the UP button, the interface
shows "5" still and "5" flashing prompts top. Gear to level "0" and then press the
DOWN button, the interface shows "0" still and "0" flashing prompts low.
To change assistance level, press the UP/DOWN to increase or
decrease until the desired assistance level is displayed.
Push-assistance Mode
Switch On/Off the Lighting
4
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Need help?
Do you have a question about the KD21C and is the answer not in the manual?
Questions and answers
Speedometer stopped working.
Speedometer stopped working
To fix the speedometer on a Key-Disp KD21C, follow these steps:
1. Check Speed Sensor Settings – Ensure the speed sensor settings are correctly configured under the personalized parameter settings.
2. Verify Wheel Diameter – Ensure the correct wheel diameter is set in the display settings to ensure accurate speed readings.
3. Inspect Connections – Check the wiring connections between the display and controller to ensure they are secure and undamaged.
4. Look for Error Codes – If an error code appears, refer to the error code list and address any abnormalities.
5. Reset to Default Settings – If the issue persists, restore default settings under the display's settings menu.
6. Check Power Supply – Ensure the display and e-bike system are powered correctly.
7. Avoid Modifying System Parameters – Modifying system parameters incorrectly may cause display malfunctions.
If the problem continues, professional repair may be needed.
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How to erase total miles on display
The total miles (odometer reading) on the Key-Disp KD21C display cannot be erased. Only the trip distance can be reset to zero by holding the MODE button. The odometer will continue counting the total distance traveled.
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How to reset to default settings
To reset the Key-Disp KD21C to default settings:
1. Hold both the UP and ON/OFF buttons for 2 seconds to access the selection interface.
2. Use the UP/DOWN buttons to choose “Y” (Yes) for recovering default settings.
3. Hold the ON/OFF button for 2 seconds to confirm.
4. The display will show DEF-00 and return to the startup page.
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I have error 24in my lcd
Error 24 on the Key-Disp KD21C LCD means "Motor Hall Signal Abnormality."
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I have error number 24 my bike is cuybike
Error number 24 for a Key-Disp KD21C bike means "Motor Hall Signal Abnormality."
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