FREE ENGLISH KEY-DISP KD21C (01) PDF USER GUIDE
FREE ENGLISH KEY-DISP KD21C (01) PDF USER MANUAL
FREE ENGLISH KEY-DISP KD21C (01) PDF OWNER GUIDE
FREE ENGLISH KEY-DISP KD21C (01) PDF OWNER MANUAL
FREE ENGLISH KEY-DISP KD21C (01) PDF REFERENCE GUIDE
FREE ENGLISH KEY-DISP KD21C (01) PDF INSTRUCTION GUIDE
FREE ENGLISH KEY-DISP KD21C (01) PDF REFERENCE MANUAL
FREE ENGLISH KEY-DISP KD21C (01) PDF INSTRUCTION MANUAL
FREE ENGLISH KEY-DISP KD21C (01) PDF OPERATING INSTRUCTIONS
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KEY-DISP KD21C (01) PDF SUMMARY:
What are the functions of the KD21C eBike display?
The KD21C eBike display has many functions to meet riders’ needs. The indication elements include battery level, motor output power, assist level, speed indication (including current speed, max speed, and average speed), ODO and trip distance, push-assistance function, trip time, backlight ON/OFF, error code indication, various parameter settings (e.g., wheel diameter, speed limit, battery power bar, assist level, current limit, maximum speed, password enable), and a function to recover default settings.
How is the KD21C display installed?
The KD21C display can be mounted on the left side of the handlebar, close to the grip. Adjust the angle for a good screen view. It’s important to cut off the power before connecting the corresponding connectors between the display and the controller.
How do you switch the e-bike system ON/OFF?
To switch on the e-bike system and provide power to the controller, hold the On/Off button for 2 seconds. To switch off the e-bike system, hold the On/Off button for 2 seconds. When the e-bike system is switched off, it no longer uses battery power, and the leakage current is less than 1 μA. If the e-bike is parked for approximately 10 minutes, the e-bike system switches off automatically.
What information does the display show by default after switching on the e-bike system?
After switching on the e-bike system, the display shows the current speed and ODO (total distance) by default.
How do you switch between different display indications?
Press the ON/OFF button to switch between the following indication functions: ODO (km) → Trip (km) → Trip Time (hour) → ODO (km) → Max. Speed (km/h) → Avg. Speed (km/h). The cycle returns to ODO (km) again.
How do you activate the push-assistance mode?
To activate the push-assistance function, press and hold the DOWN button for 2 seconds. The e-bike will then move at a uniform speed of 6 km/h while the screen displays “P”. The push-assistance function is switched off when you release the DOWN button.
When should the push-assistance mode be used?
The push-assistance function may only be used when pushing the e-bike. Be aware of the danger of injury if the bike wheels do not have ground contact while using the push-assistance function.
How do you switch the e-bike lights ON/OFF?
To switch on the e-bike’s front or rear light, press the UP button for 2 seconds. The display backlight brightness will be reduced, and the screen will display the light symbol. To switch off the lights, press the UP button for 2 seconds again; the lights will switch off and the display backlight will return to its normal brightness. If the e-bike front or rear light is independent of the UP button, the UP button can only be used to switch the display backlight on/off.
How do you change the assist level on the e-bike?
The assist level of the e-bike drive can be changed anytime, even while riding. The assist level ranges from 0 to 5. The default assist level is 1 when the display is started. Level 0 has no output power, Level 1 is the minimum output power, and Level 5 is the maximum output power. Press the UP or DOWN button to switch between the e-bike system assist levels and change the motor output power.
What does the battery indicator on the display show?
The five battery power bars represent the capacity of the battery. The five bars are bright when the battery is fully charged. When the battery is low, the battery frame will flash at a frequency of 1Hz to indicate that the battery needs to be recharged immediately.
What happens when an error is detected by the e-bike system?
When an error is detected, the respective error code is indicated in the text indication area. Refer to the error code definitions in Attached list 1 of the PDF.
What should you do when an error code appears on the display?
Have the display inspected and repaired when an error code appears. Otherwise, you may not be able to ride the bike normally. It is recommended that you always refer to an authorized bicycle dealer.
How do you access the general settings menu?
After the e-bike system is switched on, hold both the UP and DOWN buttons simultaneously for 2 seconds to access the general settings menu. All settings should be completed on a parked e-bike.
What is the trip distance clearance setting?
TC represents trip distance clearance settings. You can choose “Y” for yes or “N” for no. The default value is “N”. To store a changed setting, press the ON/OFF button to access backlight settings.
What are the backlight settings?
bL represents backlight settings. Level 1 is the lowest brightness, Level 2 is medium, and Level 3 is the highest. The default value is Level 1. To change the backlight brightness, press the UP or DOWN button to increase or decrease until the desired brightness is displayed. To store a changed setting, press the ON/OFF button and access unit toggling settings.
How do you toggle the unit between kilometers and miles?
U represents unit settings. “1” is for miles, and “2” is for kilometers. The default value is “2” (kilometers). To toggle the unit, press the UP or DOWN button until the desired unit is displayed. To store the changed setting, press the ON/OFF button and access trip distance clearance settings again or hold the ON/OFF button for 2 seconds to exit general settings.
How do you access the general parameter settings interface?
To access the general parameter settings interface, hold both the UP and DOWN button simultaneously for 2 seconds to enter general settings, then hold both the DOWN and ON/OFF buttons for 2 seconds again.
How do you set the wheel diameter?
Ld represents wheel diameter settings. Optional values are 16, 18, 20, 22, 24, 26, 700C, and 28 inches. The default value is 20 inches. Press the UP or DOWN button to increase or decrease the wheel diameter until the desired value is displayed. To store a changed setting, press the ON/OFF button and access speed-limit settings interface.
How do you set the speed limit?
LS represents the speed limit settings. When the current speed is faster than the set speed limit, the e-bike system will be switched off automatically. The speed limit ranges from 12 km/h to 40 km/h. The default value is 25 km/h. Press the UP or DOWN button to increase or decrease the speed limit values until the desired one is displayed. To store a changed setting, press the ON/OFF button and access the wheel diameter setting again or hold the ON/OFF button for 2 seconds to exit general parameter settings.
How do you access the personalized parameter settings?
Hold the UP and DOWN buttons simultaneously for 2 seconds to enter general settings, then hold the UP and DOWN buttons simultaneously for another 2 seconds to enter the personalized parameter settings interface. Press the UP or DOWN button to choose the personalized parameter setting item, then press the ON/OFF button to enter the corresponding setting interface.
What are the personalized parameter settings?
The personalized parameter settings include battery power bar settings, power assist level settings, power-on password settings, and power assist sensor settings.
How do you set the battery power bar voltage?
VOL represents voltage settings. Each bar represents a voltage value. Each of the 5 values is to be entered one by one. For example, VOL 1 is the first bar voltage value, and the default value is 31.5V. Press the UP or DOWN button to increase or decrease the bar value and press the ON/OFF button to store the changed setting and access the second bar. After values for all 5 bars are entered completely, press ON/OFF to confirm and return to the previous menu.
What are the available assist level modes?
There is one assist level mode: 0-5, which is not adjustable.
How do you set the power-on password?
PSd represents power-on password settings. The power-on password is a 4-digit code. The default password is “1212”. Press the ON/OFF button to enter the interface where “P2, 0000” is shown on the screen. Input the current or default password ‘1212’. Press the UP/DOWN button to increase or decrease the number and press the ON/OFF button to confirm digits one by one until the correct 4-digit password is completed. Then press the ON/OFF button to access the power-on password Enable/Disable Settings. Otherwise, stay in the password input state.
How do you enable or disable the power-on password?
Press the UP or DOWN button to choose “Y” for enable or “N” for disable, and then press the ON/OFF button to confirm. The default value is “N”. If you choose “Y”, press the ON/OFF button and then access the power-on password change interface. If you choose “N”, you will exit the power-on password settings interface and return to the previous menu.
How do you change the power-on password?
When the display shows “P3, 0000”, press the UP/DOWN button to change the number, then press the ON/OFF button to confirm digits one by one until a new 4-digit password is completed. To store the new power-on password, hold the ON/OFF button for 2 seconds, and then exit the settings. When you switch on the e-bike system next time, the display will show P1,0000; input the new password to power on.
How do you set the power assist sensor direction?
“run-F” means forward direction, while “run-b” means backward direction. The default value is “run-F”. Press the UP/DOWN button to select “F” or “b” to change the direction of the power assist sensor. Press the ON/OFF button and then access PAS sensitivity settings.
How do you set the power assist sensor sensitivity?
SCN represents PAS sensitivity settings. The sensitivity value ranges from “2” to “9”, where “2” is the strongest, and “9” is the weakest. The default value is “2”. Press the UP/DOWN button to choose the sensitivity value to change the PAS sensitivity settings. Then, press the ON/OFF button and then access magnet disk settings.
How do you set the power assist sensor magnet quantity?
N represents the number of magnets on the PAS disk. The default value is 12. Press the UP/DOWN button to select the number of magnets on the PAS disk. Hold the ON/OFF button for 2 seconds to confirm and return to the previous menu.
How do you exit the personalized parameter settings?
In the personalized parameter settings interface, press the ON/OFF button to confirm the input. Hold the ON/OFF button to store the settings and exit the current setting. Hold the DOWN button to cancel the operations and return to the previous menu without storing the setting data. If there is no operation in one minute, the display will exit the settings interface.
How do you recover default settings?
dEF represents recovering default settings. The default value is “N”. To access recover default settings, hold both the UP and ON/OFF buttons for 2 seconds, then access the selection interface. Press the UP/DOWN button to choose “Y” or “N”. “N” means not recovering default settings. “Y” means recovering default settings. When it is “Y”, hold the ON/OFF button for 2 seconds to recover default settings. The display will show DEF-00 and return to the display start-up page.
What are the warranty conditions for the display?
The warranty is valid for 24 months after shipment or delivery to the customer, and only for products used under normal usage and conditions.
What cases are not covered under warranty?
The following cases do not belong to warranty scope: 1) The display is demolished, 2) damage is caused by wrong installation or operation, 3) the shell of the display is broken after the display is out of the factory, 4) the cable of the display is broken, 5) the warranty period has expired, 6) damage or fault of the display is caused by force majeure (e.g. fire, earthquake, etc.).
What is the wire sequence for connecting the display to the controller?
The wire sequence is as follows: 1) Red (VCC) +, 2) Blue (K) Lock, 3) Black (GND) -, 4) Green (RX) RX, 5) Yellow (TX) TX. Some displays have wire connections with waterproof connectors, where the color of the lead wires in the harness cannot be seen.
What are some warnings to be aware of when using the display?
Use the display with caution. Do not attempt to release or link the connector when the battery is powered on. Try to avoid hitting the display. Do not modify system parameters to avoid parameter disorder. Have the display repaired when an error code appears. This manual instruction is a universal version for display KD21C; some versions of this display may be different from specification to specification as to the software. Always refer to the actual version.
What are the error codes?
- 21: Current Abnormality
- 22: Throttle Abnormality
- 23: Motor Phase Abnormality
- 24: Motor Hall Signal Abnormality
- 25: Brake Abnormality
- 30: Communication Abnormality
What are the symbols for personalized parameter settings?
- Battery Power Bar Settings
- Power assistant level Settings
- Power-on Password Settings
- Power Assistant Sensor Settings
What are the default assist level ratios?
| Level | PAS |
|---|---|
| Level mode | 1 2 3 4 5 |
| 0-5/ 1-5 | 50% 61% 73% 85% 96% |
What are other symbols used in the display?
- Trip distance clearance
- Backlight
- Unit
- Voltage
- Wheel diameter
- Speed limit
- Backward
- Forward
- Sensitivity of PAS
- Password
- Recover default
- Yes
- No
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How do I get my display to show miles and speed when I am using no power assist?
To change your display from kilometers to miles, follow these steps:
Turn on the e-bike system by holding the ON/OFF button for 2 seconds.
Hold both the UP and DOWN buttons simultaneously for 2 seconds to enter the general settings menu.
Press the UP/DOWN button to cycle through the menu options until you reach the unit toggling setting, represented by a “U” on the screen.
The default unit is kilometers (“2”). Press the UP/DOWN button to change it to miles (“1”).
Press the ON/OFF button to store your changes.
The display will now show speed and distance in miles.
You did not ask how to turn off power assist, but if you would like to, you can set the assist level to “0”. This will result in zero motor output power, as if you were riding a traditional bicycle. To do this, press the UP/DOWN button while riding to change the assist level to 0.