Key-Disp KD21C User Manual
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Key-Disp KD21C User Manual

Intelligent lcd display of ebike
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  • Page 2: Table Of Contents

    Content Product name and model ................1 Specifications ....................1 Appearance and Size ..................1 ◆Color categories .................. 1 Function Summary and Button Definition ............1 ◆Function Summary................1 ◆Functional Area Distribution ............... 2 ◆Button Definition ................2 General Operation ..................3 ◆Switching the eBike System On/Off .............
  • Page 3 Assistance Level option ..............9 PAS Ratio Settings ................10 ◆Controller Over-Current Cut Settings ..........10 ◆Power Assistant Sensor Settings............10 The Direction of Power Assistant Sensor Settings ......10 The Sensitivity of PAS Settings ............11 Magnet quantity Settings ............... 11 ◆Speed Sensor option ................

  • Page 4: Product Name And Model

    Top shell of the display is two color options, black and white, and bottom shell of the display is only one black. Function Summary and Button Definition ◆Function Summary KD21C can provide a lot of functions to fit the users’ needs. The...

  • Page 5: Functional Area Distribution

    ●Recover Default Settings ◆Functional Area Distribution ◆Button Definition There are three buttons ( ) on the KD21C display that represented by the following functions respectively: MODE, UP, DOWN.

  • Page 6: General Operation

    General Operation ◆Switching the eBike System On/Off To switch on the eBike system, hold the MODE button for 2s. In the same way to hold the MODE button for 2s again, the eBike system will be switched off. When switching off the eBike system the leakage current is less than 1 uA.

  • Page 7: Switching The Lighting On/Off

    Push-assistance Mode ■ 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.

  • Page 8: Battery Indicator

    Assistance Level “3” ◆Battery Indicator The five battery bars represent the capacity of the battery. W hen the battery is in low voltage, battery frame will flash to notice that the battery needs to be recharged immediately. Low Voltage Flash Battery Indicator ◆Error Code Indication If there are errors about the electronic control system, the error code...

  • Page 9: Trip Distance Clearance

    menu, hold both the UP and DOWN button for 2s. ■ All the Settings are operated in the case of parking the eBike. ◆Trip Distance Clearance TC represents trip distance clearance setting. To clear trip distance, press the UP/DOWN button to choose Y or N. The default value is N.

  • Page 10: General Parameter Settings

    value is “2”. To convert unit, press the UP/DOWN button to increase or decrease until the desired setting is displayed. To store a changed setting, press the MODE button, and then access trip distance clearance settings. To store a changed setting, hold the MODE button for 2s and then exit general settings.

  • Page 11: Personalized Parameter Settings

    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.

  • Page 12: Battery Power Bar Settings

    ◆Battery Power Bar Settings VOL represents voltage settings. Each bar represents a voltage value. 5 bars voltage values must be entered one by one. For example, VOL 1 is first bar voltage value, the default value is 31.5. To set battery power bar, press the UP/DOWN button to increase or decrease the number.

  • Page 13: Pas Ratio Settings

    PAS Ratio Settings To modify the value of PAS ratio can match the different requirements. For example, the range is “45-55 percent” of “1” level, bottom value can be modified, and the default value is 50 percent. To store the modified setting, press the MODE button and turn to the next PAS ratio settings.

  • Page 14: The Sensitivity Of Pas Settings

    To change The Direction of Power Assistant Sensor Settings, press the UP/DOWN button to select F or b. To store a changed setting, press the MODE button and then access settings mode of PAS sensitivity. Direction of PAS Sensor Settings The Sensitivity of PAS Settings SCN represents the sensitivity of PAS settings.

  • Page 15: Speed Sensor Option

    PAS Magnet Disk Settings ◆Speed Sensor option SPS represents speed sensor settings. The default value is 1 To change speed sensor settings, press the UP/DOWN button to select the quantity of magnet head (the range is from 1 to 9). To store a changed setting, hold the MODE button and then return to previous menu.

  • Page 16: Throttle Level Enable/Disable

    Throttle Level Enable/Disable HF-y represents throttle level is enabled. HF-N represents throttle level is disabled. The default value is N. To change throttle level function, press the UP/DOWN button to select Y or N. To store a changed setting, press the MODE button and then access Throttle Enable Settings page.

  • Page 17: Button Push-Assistance Enable/Disable

    Interface of Max Speed Limited Settings ■ This setting is the priority version. The speed is the maximum set by manufacturer. Button Push-assistance Enable/Disable PUS represents button push-assistance settings. Y represents button push is enabled, N represents button push is disabled. The default value is Y.

  • Page 18: Slowly Start Up Settings

    Interface of PAS Speed Settings Slowly Start up Settings SSP represents slowly start up. The range is “1-4”, “4” is the slowest. The default value is “1”. To change slowly start up settings, press the UP/DOWN button to select the desired value. To store a changed setting, press the MODE button and then turn to Delay time settings of battery power page.

  • Page 19: Power-On Password Enable/Disable

    Power-on Password Entering Interface Power-on Password Enable/Disable To change power-on password enable/disable settings, press the UP/DOWN button to select Y or N. If it is Y, press the MODE button and then access power-on password modify interface, otherwise exit the power-on password settings interface.

  • Page 20: Exit Settings

    Power-on Password Modify Interface ◆Exit settings In the settings state, pressing the MODE button is to confirm the input. Holding the MODE button is to store the settings, and then exit the current settings. Holding the DOWN button is to cancel the operating but not storing settings data, and then return to previous menu.

  • Page 21: Quality Assurance And Warranty Scope

    ◆ Don’t modify system parameters to avoid parameters disorder. ◆ Make the display repaired when error code appears. Quality assurance and warranty scope Ⅰ Warranty 1) The warranty will be valid only for products used in normal usage and conditions. 2) The warranty is valid for 24 months after the shipment or delivery to the customer.
  • Page 22 Line sequence table Line sequence Color Function Red(VCC) Blue(K) Lock Black(GND) Green(RX) Yellow(TX) ■ Some wire use the water-proof connector, users can not see the inside color. Attached list 1：Error code definition Error Code Definition Current Abnormality Throttle Abnormality Motor Abnormality Motor Hall Signal Abnormality Brake Abnormality Communication Abnormality...
  • Page 23 Attached list 2: Personality Parameter settings Screen Settings item display Battery Power Bar Settings Power assistant level Settings Over-current Cut Settings Power Assistant Sensor Settings Speed Sensor Settings Throttle Function Settings System Settings Power-on Password Settings Attached list 3：Power assist table...
  • Page 24 Attached list 4：symbol definition Symbol Definition Trip distance clearance Backlight Unit Voltage Wheel diameter Speed limit Controller over-current cut Backward Forward Sensitivity of PAS Speed sensor Power delayed time Throttle power assist walk Throttle-changing Button push Slowly start up Password Recover default...

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