BURCHDA e-bike display manual - YL81F

This display manual is suitable for BURCHDA R5 PRO/RX90/U8/Upgraded RX80.

Please note: As the display manual includes multiple ebike models, specific functions are subject to the actual ebike, and not all functions available.

1. Product Name and Model Number

Smart LCD display for electric bicycle; Model: YL81F.

2. Specification

• 24V/36V/48V power supply
• Display rated current 15mA
• Display maximum current 30mA
• Shutdown leakage current <1uA
• Supplied current to the controller 50mA
• Operating temperature -20～60℃
• Storage temperature -30 to 70°C

3. Appearance and Size

4. Function Overview and Functional Areas

4.1 Functional overview 

The YL81F 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, rated voltage, PAS parameter, password, and controller current limit setting, etc.).
• Factory default parameter recovery function

4.2 Functional areas

4.3 Button definitions 

The YL81F 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 pressto 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. 

 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 Trip Odometer (km) by default. Short press to switch between Trip Odometer(km), Odometer (km), Maximum Speed (km/h), and Average Speed (km/h).

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/h and the display shows. Release to stop the power output immediately and restore to the state before walk boost.

 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 theto 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 

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

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.

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. 

 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: 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 pressto enter the parameter changing state.
3. Press /  to select the parameter, long pressfor addition operation, long press for subtraction operation.
4. Pressto save the parameter settings and return to the personalized parameter setting interface.
5. Long Pressto save the parameter settings and exit the personalized parameter setting interface.

The following options are available on the personalized parameter setting interface: 

6.1 Backlight luminance setting

01P is the backlight luminance setting. Parameters 01, 02 and 03 are available, which represent the backlight

luminance, 01 for the minimum luminance, 02 for the standard luminance and 03 for the maximum luminance.

Press the buttonto enter the parameter modification interface. Press the button/for parameter selection.

Press the buttonto save the parameter and return to the selection interface of general setting options.

6.2 Metric and Imperial setting

02P 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 pressto save the parameter setting and return to the personalized parameter setting interface.

6.3 Rated voltage setting

03P is the rated voltage setting. The available rated voltage range is: 24V, 36V, 48V.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save theparameter setting and return to the personalized parameter setting interface.

6.4 Auto Sleep Time Setting

04P 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: 1~60min, 00 means no auto shutdown. The factory default setting is 10 minutes.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.5 PAS level setting

05P is the Pedal assist level setting. The available PAS level settings are: 0~3, 1~3, 0~5, 1~5.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.6 Wheel diameter setting

06P is the wheel diameter setting. The adjustable wheel diameter range is: 1~50inch.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.7 Number of speed sensor magnets setting

07P is the speed sensor magnet number setting. The adjustable speed sensor magnet number range is: 1 ~ 255 pcs.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.8 Speed Limit Setting

08P is the speed limit setting. The adjustable speed limit range is: 1~100km/h. (The maximum adjustable speed limit varies by different protocols).

Pressto 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.

6.9 Start-up setting

09P is the start-up setting. The display can choose the following start modes: 00→zero start, 01→non-zero start.

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

6.10 Drive mode setting

10P is the drive mode setting. The available drive modes are: 00→Pedal assist only, 01→Electric only, 02→Both Pedal

assist and electric.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.11 Pedal assist sensitivity setting

11P is the pedal assist sensitivity setting. When set to higher numbers, it will take more crank rotations to activate the

motor. On lower numbers, it will take little crank rotation to activate the motor. The adjustable range is: 1~24.

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

6.12 Pedal assist strength setting

12P is the Pedal assist strength setting. The Pedal assist strength is the relative strength of the PWM signal from the controller when start to activate pedal assist. The adjustable range is 0 ~ 5. 0 is the weakest strength and 5 is the strongest.

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

6.13 Number of pedal assist sensor magnets setting

13P is the number of pedal assist sensor magnets setting. The adjustable range: 5, 8, 12 pcs.

Pressto enter the parameter changing state. Press the / to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.14 Controller Current Limit Setting

14P is the controller current limit setting. The adjustable range is: 1~50A.

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.

6.15 Battery under voltage value setting

15P is the battery under voltage setting. The value can be adjusted based on the current rated voltage.

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.

6.16 ODO resets setting

16P is the ODO resets setting. The display can choose the following: 00→non reset, 01→reset.

Pressto enter the parameter changing state. Press the/to select the parameter and pressto save the parameter setting and return to the personalized parameter setting interface.

6.17 Display speed ratio

17P Select display speed ratio, 50%-150% range adjustable.

Pressto 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.

7. Shortcut Operation

7.1 Restore factory settings operation 

dEF is the restore factory default parameter settings. dEF-Y is to restore 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.

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. 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.

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.

• The shell is opened.
• The connector is damaged.
• Scratches on the appearance after the product is out of factory.
• Scratched or broken wires
• Failure or damage caused by force majeure (e.g. fire, earthquake, etc.) or natural disaster (e.g. lightning strike, etc.)
• Out of warranty period.

9. Wire Connection Diagram

9.1 Standard wire connection sequence:Table 9-1 Standard connector wire sequence table

■ Some models are equipped with waterproof connectors and the color inside wires can not be seen.

10.Precautions

Pay attention to all the general operating when using the products and do not plug and unplug the display while it is powered on.

• Avoid bumping the display as much as possible.
• Please do not change the parameter settings at will, otherwise normal riding cannot be guaranteed.
• If display does not work properly, please send it to the repair center as soon as possible.
• There may be differences between the physical products and this manual due to normal upgrade. Please refer to the physical products.