YL91F-V E-Bikes Bundle

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Product Information

Specifications

• Power Supply: 36V/48V/52V
• Display Rated Current: 15mA
• Display Maximum Current: 30mA
• Shutdown Leakage Current: [specification not provided]

Product Usage Instructions

1. Appearance and Size

Describe the physical appearance and dimensions of the electric
bike display.

2. Function Overview and Functional Areas

Explain the different functions of the display and highlight the
functional areas on the screen.

3. Routine Operation

Provide step-by-step instructions on how to operate the display
during regular use, such as switching on/off, mode selection,
etc.

4. Personalized Parameter Settings

Guide users on how to customize specific parameters to suit
their preferences or requirements.

5. Shortcut Operation

Explain any shortcuts available for quick access to commonly
used features.

FAQ

Q: What should I do if the display shows an error code?

A: Refer to Schedule 1 in the user manual for error code
definitions and troubleshooting steps.

Q: How do I reset the trip odometer?

A: Follow the instructions in section 7.2 of the user manual for
resetting the trip odometer.

Q: Does the warranty cover all components of the electric bike

display?

A: Warranty coverage details can be found in section 8 of the
user manual, including what is and isn’t covered.

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Electric Bike Display
User’s Manual
YL91F-V
Tianjin Yolin Technology Co. Ltd.

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 FUNCTIONAL OVERVIEW ……………………………………………………………………………………………………………………………. 3 4.2 FUNCTIONAL AREAS …………………………………………………………………………………………………………………………………. 3 4.3 BUTTON DEFINITIONS ………………………………………………………………………………………………………………………………..3
5. ROUTINE OPERATION ……………………………………………………………………………………………………………………………………… 3
5.1 POWER ON/OFF ……………………………………………………………………………………………………………………………………….. 3 5.2 DISPLAY INTERFACE SWITCHING ………………………………………………………………………………………………………………….. 4 5.3 WALK BOOST MODE …………………………………………………………………………………………………………………………………. 5 5.4 TURNING ON/OFF LIGHTS ………………………………………………………………………………………………………………………….. 5 5.5 PAS LEVEL SELECTION ………………………………………………………………………………………………………………………………… 5 5.6 BATTERY LEVEL DISPLAY ……………………………………………………………………………………………………………………………..6 5.7 ERROR CODE DISPLAY ………………………………………………………………………………………………………………………………… 6
6. PERSONALIZED PARAMETER SETTINGS ………………………………………………………………………………………………………………. 6
6.1 METRIC AND IMPERIAL SETTING …………………………………………………………………………………………………………………. 7 6.2 RATED VOLTAGE SETTING ……………………………………………………………………………………………………………………………7 6.3 PAS LEVEL SETTING …………………………………………………………………………………………………………………………………… 8 6.4 WHEEL DIAMETER SETTING ………………………………………………………………………………………………………………………… 8 6.5 NUMBER OF SPEED SENSOR MAGNETS SETTING ……………………………………………………………………………………………9 6.6 SPEED LIMIT SETTING ………………………………………………………………………………………………………………………………… 9 6.7 START-UP SETTING ………………………………………………………………………………………………. ERROR! BOOKMARK NOT DEFINED. 6.8 DRIVE MODE SETTING ………………………………………………………………………………………………………………………………..8 6.9 PEDAL ASSIST SENSITIVITY SETTING ……………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED. 6.10 PEDAL ASSIST STRENGTH SETTING ………………………………………………………………………… ERROR! BOOKMARK NOT DEFINED. 6.11 NUMBER OF PEDAL ASSIST SENSOR MAGNETS SETTING ……………………………………………. ERROR! BOOKMARK NOT DEFINED. 6.12 CONTROLLER CURRENT LIMIT SETTING ………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED. 6.13 BATTERY UNDER VOLTAGE VALUE SETTING …………………………………………………………….. ERROR! BOOKMARK NOT DEFINED. 6.14 POWER-ON PASSWORD SETTING ………………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED. 6.15 AUTO SLEEP TIME SETTING ………………………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED.
7. SHORTCUT OPERATION …………………………………………………………………………………………………………………………………… 9
7.1 SHORTCUT OPERATION ………………………………………………………………………………………… ERROR! BOOKMARK NOT DEFINED. 7.2 TRIP ODOMETER RESET OPERATION ……………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED.
8. QUALITY ASSURANCE AND WARRANTY ………………………………………………………………… ERROR! BOOKMARK NOT DEFINED.
8.1 WARRANTY INFO ………………………………………………………………………………………………… ERROR! BOOKMARK NOT DEFINED. 8.2 WARRANTY DOES NOT COVER ……………………………………………………………………………….. ERROR! BOOKMARK NOT DEFINED.

9. WIRE CONNECTION DIAGRAM ……………………………………………………………………………. ERROR! BOOKMARK NOT DEFINED. 9.1 STANDARD WIRE CONNECTION SEQUENCE ………………………………………………………………. ERROR! BOOKMARK NOT DEFINED.
10. PRECAUTIONS ………………………………………………………………………………………………… ERROR! BOOKMARK NOT DEFINED. SCHEDULE 1: ERROR CODE DEFINITION ……………………………………………………………………………………………………………….. 10 SCHEDULE 2: PEDAL ASSIST LEVEL DEFAULT RATIO VALUE ……………………………………………. ERROR! BOOKMARK NOT DEFINED.

1. Product Name and Model Number
Smart LCD display for electric bicycle; Model: YL91F-V.
2. Specification
36V/48V/52V power supply Display rated current 15mA Display maximum current 30mA Shutdown leakage current <1uA Supplied current to the controller 50mA Operating temperature -2060 Storage temperature -30 to 70°C
3. Appearance and Size
Figure 3-1 Physical picture of the YL91F-V display 1

Figure 3-2 Physical picture of the K5 control button

Figure 3-3 Physical picture of the K6 control button

Figure 3-4 91F-V Front View Dimension

Figure 3-5 91F-V Side View Dimension

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4. Function overview and Functional areas
4.1 Functional overview The YL91F-V display offers a variety of features to suit your riding needs, including: Battery level indicator Pedal assist (PAS) level indicator Speed (current speed, maximum speed, average speed) Mileage display (single and total mileage) Walk boost mode Light ON/OFF Error code indicator Motor power indicator (optional) USB connection indicator (optional) Cruise control indicator (optional) Bluetooth connection indicator (optional) Personalized parameter settings (e.g. wheel diameter, speed limit, battery power setting and PAS parameter setting,
password setting, controller current limit setting, etc.). Factory default parameter recovery function
4.2 Functional areas

Battery level indicator

Light ON/OFF

Speed
Error code
Odometer Trip odometer
Max speed Average speed
Walk boost

Cruise control Speed unit KM/H MPH PAS level
Value and unit

4.3 Button definitions

Figure 4-1 YL91F-V functional area distribution interface

The YL91F-V display is equipped with five buttons on the corresponding operating unit: power on/off , plus ,

minus , light and toggle .
5. Routine operation
5.1 Power on/off
Long press to power on/off the display. When the display is off, it will not use the battery power and the leakage current is less than 1uA.
3

The display will automatically shut off if it is not used for more than 10 minutes.
5.2 Display interface switching When the display is powered on, it will show the Current Speed (km/h) and Odometer (km) by default. Short press to switch between Odometer (km), Trip Odometer(km), Maximum Speed (km/h), and Average Speed (km/h).

Odometer

Trip Odometer

Maximum Speed display

Average speed display
Figure 5-1 Display Interface Switching
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5.3 Walk boost mode Long Press and hold , the electric bicycle enters the walk boost mode. The electric bicycle will walk at a fixed speed
of 6 km per hour and the display shows . Release the button to stop the power output immediately and restore to the state before walk boost.

Figure 5-2 Helping to implement the display screen
The walk boost mode can only be used when pushing the electric bicycle, please do not use it while riding. 5.4 Turning on/off lights
Press the to make the controller turn on the lights and the display backlight becomes dim. Press again to make the controller turn off the lights and the backlight restore brightness.

5.5 PAS level selection

Figure 5-3 Backlight display interface

Press / to switch PAS level of electric bicycle, thus changing the motor output power.

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Figure 5-4 PAS level display interface
5.6 Battery level display The Battery level is shown as 5 bars. When the battery is full charged, all of the 5 bars lighten up. When the battery is fully depleted, the bar will begin to flash, warning the user to charge the battery as soon as possible.

Full power

Four bars power

Three bars power

Two bars power

One bar power

Empty power flashing Figure 5-5 Battery Level Display Interface
5.7 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 5-6 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.
6. Personalized parameter settings
Each setting needs to be done with the bicycle stationary. The personalized parameter setting procedure is as follows:
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When the display is ON and the speed shows 0,

(1) Press and hold

simultaneously for more than 2 seconds to enter the personalized parameter setting

interface.

(2) Press / to toggle between the personalized parameter setting interface, and press to enter the

parameter changing state.

(3) Press / to select the parameter, long pres for addition operation, long press for subtraction

operation.

(4) Press

to save the parameter settings and return to the personalized parameter setting interface.

(5) Long Press to save the parameter settings and exit the personalized parameter setting interface. The following options are available on the personalized parameter setting interface: 6.1 Metric and Imperial setting
P1 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 parameter setting and return to the personalized parameter setting interface.

to save the

Figure 6-1 Metric and Imperial Units Setting Interface

6.2 Speed Limit Setting
P6 is the speed limit setting. The adjustable speed limit range is: 1~100km/h. (The maximum adjustable speed limit varies by different protocols)

Press to enter the parameter changing state. Press the / to select the parameter and press parameter setting and return to the personalized parameter setting interface.

to save the

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Figure 6-2 Speed limit setting interface

6.3 Drive mode setting P8 is the drive mode setting. The available drive modes are: 00Pedal assist only, 01Electric only, 02Both Pedal
assist and electric.

Press to enter the parameter changing state. Press the / to select the parameter and press parameter setting and return to the personalized parameter setting interface.

to save the

Figure 6-3 Drive mode setting interface 8

7. Shortcut operation
7.1 Restore factory 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 and simultaneously for 2s to
enter the restore factory default setting interface. Pressing / to toggle to dEF-Y. Then after pressing to confirm, the display will show dEF-0 for a few seconds and then automatically start to restore the factory default settings. The display will automatically exit to setting interface after the restoration.
Figure 7-1 Restore Factory Default Settings Interface
7.2 Trip odometer reset operation The display can record trip odometer and odometer. Trip odometer is not automatically reset after turning off. The trip
odometer needs to be reset manually. The odometer can not be reset. Enter into the main setting interface and keep the speed at 0, press and hold and simultaneously for 2s to
reset the trip odometer. The main interface will flash during the reset process.
Figure 7-2 Trip Odometer Reset Interface 9

Schedule 1: Error Code Definition
YL-01, YL-02 Error codes

Error code

Definition

Error code

Definition

E001

Controller failure

E004

Throttle failure

E002 E003

Communication failure Hbraelal kfdaiolwurne

E005 E006

Brake failure Motor phase failure

YL-05, KDS, YL-J 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 breakdown

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