Yolin YL91F-E User Manual
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Yolin YL91F-E User Manual

Yolin YL91F-E User Manual

Electric bike display
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Electric Bike Display
User's Manual
YL91F-E

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THOMAS BIESE
June 13, 2025

Is the K5 controller button an upgrade to the K8 controller button ?

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Summary of Contents for Yolin YL91F-E

  • Page 1 Electric Bike Display User’s Manual YL91F-E...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. PRODUCT NAME AND MODEL NUMBER ........................... 1 2. SPECIFICATION ...................................1 3. APPEARANCE AND SIZE ................................1 4. FUNCTION OVERVIEW AND FUNCTIONAL AREAS ........................3 4.1 F ..............................3 UNCTIONAL OVERVIEW 4.2 F ................................3 UNCTIONAL AREAS 4.3 B ................................

  • Page 3: Product Name And Model Number

    1. Product Name and Model Number Smart LCD display for electric bicycle; Model: YL91F-E. 2. Specification ● 48V power supply ● Display rated current 15mA ● Display maximum current 30mA ● Shutdown leakage current <1uA ● Supplied current to the controller 50mA ●...
  • Page 4 Figure 3-2 Physical picture of the K8 control button Figure 3-3 91F-E Front View Dimension Figure 3-4 91F-E Side View Dimension...

  • Page 5: Function Overview And Functional Areas

    Max speed Average speed Cruise control Figure 4-1 YL91F-E functional area distribution interface 4.3 Button definitions The YL91F-E display is equipped with seven buttons on the corresponding operating unit: power on/off , plus (reuse with light ), minus , left turn...

  • Page 6: Display Interface Switching

    5.2 Display interface switching When the display is powered on, it will show the Current Speed (mile/h) and Trip Odometer (mile) by default. Short press to switched cyclically between Trip Odometer (mile), Odometer(mile), Maximum Speed (mile/h), Average Speed (mile/h),Voltage(V), and Current(A). Odometer Trip Odometer Current...

  • Page 7: Reverse Function

    5.3 Reverse function Long press and hold , the electric bicycle enters reverse mode. The display gear value shows R.Simultaneously, the left and right turn icons flashing prompt. Release to exit the reverse mode of the electric bicycle. Figure 5-2 Reverse function display interface 5.4 Turning on/off lights Long press to make the controller turn on the lights and the display backlight becomes dim.

  • Page 8: Turn Left/Right On/Off

    5.6 Turn left/right on/off Press the to activate left turn, then press again to deactivate left turn; Press to activate right turn, then press again to deactivate right turn. (When the steering function is turned on and the speed is greater than 6.5km/h, the rollover warning icon will light up) Figure 5-5 Turn on the left turn display interface Figure 5-6 Turn on the right turn display interface...

  • Page 9: Error Code Display

    5.10 Error code display If there is a fault occurs in the electronic system of the electric bicycle, the display will automatically show an error code, see Schedule 1 for a detailed definition of the error code. Figure 5-9 Error code display When the error code appears on the display, please troubleshoot the problem in time, the electric bicycle will not be able to drive normally after the problem occurs.

  • Page 10: Metric And Imperial Setting

    6.1 Metric and Imperial setting 01P is the metric and imperial setting, 00 for metric and 01 for imperial. Press to enter the parameter changing state. Press the to select the parameter and press to save the parameter setting and return to the personalized parameter setting interface. Figure 6-1 Metric and Imperial units setting interface 6.2 PAS level setting 02P is the Pedal assist (PAS) level setting.

  • Page 11: Throttle Level Setting

    6.4 Throttle level setting 04P is the throttle level setting. 00 is to disable the throttle level. 01 is to enable the throttle level. If you select 01, it means that when the steering angle is turned to the maximum, the bicycle speed can only reach the maximum speed that can be reached by the current display of the throttle level;...

  • Page 12: Power-On Password Setting

    6.5 Power-on password setting 05P is the power-on password setting. The power-on password is not activated by default but users can activate it from setting PSd-y. The factory default password is 1212. Users can set other four-digit password. Please keep the password in mind after changing it, otherwise you will not be able to use the display.

  • Page 13: Auto Sleep Time Setting

    6.6 Auto sleep time setting 06P is the auto sleep time setting. To save the battery power and reach higher range, this display will be turned off after it has not been used for a time. The adjustable range is: 00~60min, 00 means no auto shutdown. The factory default setting is 10 minutes.

  • Page 14: Speed Limit Setting

    6.8 Speed limit setting In the personalized parameter setting interface, press and hold simultaneously for more than 2 seconds to enter speed limit adjustment mode. The adjustable range : SP-N has a maximum speed limit (usually show as 25km/h), SP-S has no maximum speed limit (usually show as 56km/h), and is in the SP-N state at the factory.

  • Page 15: Shortcut Operation

    7. Shortcut operation 7.1 Restore factory default parameter settings operation dEF is the restore factory default parameter settings. dEF-Y is to restore the factory default settings, and dEF-N is not to restore. Enter into the main setting interface and keep the speed at 0, press and hold simultaneously for 2s to enter the restore factory default setting interface.

  • Page 16: Quality Assurance And Warranty

    8. Quality Assurance and Warranty 8.1 Warranty info ● Yolin will offer a limited warranty for any failure caused by the product defects under normal use during the warranty period. ● The product is warranted for 12 months from the date out of factory.

  • Page 17: Schedule 1: Error Code Definition

    Schedule 1: Error Code Definition YL-05 Error codes: Error code Definition Error code Definition E021 Current failure E024 Hall failure E022 Throttle failure E025 Brake failure E023 Motor phase failure E030 Communication failure Tel: 022-86838795 Fax: 022-86838795 Email: store@yolintech.com Website: www.yolintech.com Address: Plant 52-1, Yougu Xinke Park, East of Jingfu Road, Pharmaceuticals and Medical Equipment Industrial Park, Beichen Economic Development Zone, Beichen District, Tianjin...

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