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faster than limit speed, the eBike system will switch off automatically.
Limit speed ranges from 12Km/h to 40Km/h. The default value is
25Km/h.
To change basic settings, press the UP/DOWN button to increase or
decrease until the desired value is displayed.
To store a changed setting and exit General Parameter Settings,
hold the MODE button for 2s.
Personalized Parameter Settings
Personalized
requirements in use. There are 8 Settings items, such as Battery Power
Bar Settings, Power assistant level Settings, Over-current Cut Settings,
Power Assistant Sensor Settings, Speed Sensor Settings, Throttle
Function Settings, System Settings and Power-on Password Settings.
Please refer to the Attached list 2.
To access Personalized Parameter Settings items option page, hold
both the UP and DOWN button for 2s, then hold both the UP and DOWN
button again.
To access the corresponding settings page, press the UP/DOWN
button to increase or decrease until the desired item is displayed, and
press the MODE button again.
Limit Speed Settings Interface
Parameter
Settings
Options Selection Interface
can
match
8
a
variety
of
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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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