User Manual for E-bike Display YL80C

1. Product Name and Model

Intelligent LCD display for e-bike; model: YL80C.

2. Specifications

• 36V/48V power supply
• Rated working current 15mA
• Maximum working current 30mA
• Leakage current at power-off <1uA
• Working current at the supply controller end 50mA
• Working temperature -20~60°C
• Storage temperature -30~70°C

3. Appearance and Dimensions

The YL80C display features a clear LCD screen and operational buttons.

Figure 3-1: Picture of Display 80C shows the display unit with a large speedometer reading, battery indicator, and trip/ODO meters.

Figure 3-2: Picture of Display 80C Buttons illustrates the physical buttons located on the display unit.

Figure 3-3: Front View of Display 80C Dimensions indicates the front dimensions of the display unit are approximately 95mm in height and 58.5mm in width.

Figure 3-4: Side View of Display 80C Dimensions shows the side profile, with a depth of approximately 31.5mm and a clamp thickness of 14mm.

4. Function Overview and Functional Area Layout

4.1 Function Overview

The YL80C display offers a range of functions to enhance your riding experience:

• Battery level indicator
• Motor power indicator
• Assist level adjustment and indication
• Speed indicator (real-time, maximum, and average speed)
• Distance indicator (trip distance and ODO)
• Push assistance control and indication
• Headlight control and indication
• Error code indicator
• USB connection indicator (reserved)
• Heart rate indicator (reserved)
• Bluetooth connection indicator (reserved)
• Custom parameter setting (e.g., wheel diameter, speed limit, battery level, assist level, power-on password, controller current limit)
• Reset function

4.2 Functional Area Layout

Figure 4-1: Functional Area Layout Interface of Display YL80C details the layout of information displayed on the screen, including indicators for battery level, fault status, speed, assist level, push assistance, and various other parameters.

4.3 Button Definitions

The display unit has five buttons: the [power/on/off] button, [plus] button, [minus] button, [headlight] button, and [switching] button.

5. General Operation

5.1 Power On/Off

Press and hold the [power/on/off] button to turn on the display and activate the controller's power supply. Pressing the [power/on/off] button again while the display is on will power off your e-bike. When powered off, the display minimizes battery usage with a leakage current below 1uA. The display will automatically power off if the e-bike is not used for over 10 minutes.

5.2 Display Interface

Upon powering on, the display defaults to showing real-time speed (km/h) and trip distance (km). Pressing the [switching] button cycles through trip distance, ODO, maximum speed, average speed, and riding power.

Figure 5-1: Display Interface Switching illustrates the transitions between showing trip distance, ODO, maximum speed, and riding power.

5.3 Push Assistance

Press and hold the [plus] button to enable electric push assistance, which runs the e-bike at a constant speed of 6km/h, indicated by a bicycle icon and '6.0 km/h' on the display. Releasing the button stops power output and returns to the previous state.

Figure 5-2: Push Assistance Indicator Interface shows the display during push assistance.

Note: Push assistance is intended for use only when pushing the e-bike, not while riding.

5.4 Headlight On/Off

Pressing the [headlight] button turns on the headlights and dims the display backlight. Pressing it again turns off the headlights, and the display backlight returns to its normal luminance.

Figure 5-3: Backlight-on Indication Interface shows the headlight icon, indicating the headlights are active.

5.5 Assist Level Selection

Pressing the [plus] or [minus] buttons allows you to cycle through and select different assist levels, which adjust the motor's output power.

Figure 5-4: Assist Level Switching Interface displays the current assist level, shown as a number.

5.6 Battery Level Indicator

The battery level is indicated by five segments. All segments are lit when the battery is fully charged. If the battery voltage is low (undervoltage), the outline of the battery indicator will flash, signaling the need for immediate charging.

Figure 5-5: Battery Level Indicator Interface shows various battery level states, including full, partial levels, and undervoltage flashing.

5.7 Motor Power Indicator

The display shows the motor's output power.

Figure 5-6: Motor Power Indicator Interface displays speed, assist level, and motor power.

5.8 Error Code Indicator

If a fault occurs in the e-bike's electronic control system, the display will show an error code. Detailed definitions for these error codes are provided in Schedule 1.

Figure 5-7: Error Code Indicator Interface shows an example of an error code display.

6. General Setting

All parameters can only be adjusted when the e-bike is stationary. The steps for general setting are as follows:

1. In the power-on state, when the display shows 0 speed, press and hold the [plus] and [minus] buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press the [plus] or [minus] button to navigate between general setting options, and press the [switching] button to enter the parameter modification interface.
3. Use the [plus] or [minus] button for parameter selection.
4. Press the [switching] button to save the parameter and return to the general setting options interface.
5. Press and hold the [switching] button to save the parameter and exit the general setting interface.

6.1 Trip Distance Reset

'tC' refers to the trip distance reset option. 'tC-n' means not to reset, and 'tC-y' means to reset the trip distance.

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button for parameter selection. Press the [switching] button to save the parameter and return to the general setting options interface.

Figure 6-1: Trip Distance Reset Interface shows the display for trip distance reset options.

6.2 Backlight Luminance Setting

'bL' refers to the backlight luminance setting. Available parameters are bL-1 (minimum luminance), bL-2 (standard luminance), and bL-3 (maximum luminance).

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button for parameter selection. Press the [switching] button to save the parameter and return to the general setting options interface.

Figure 6-2: Backlight Luminance Setting Interface shows the display for backlight luminance settings.

6.3 Metric/Imperial System Setting

'Un' refers to the metric/imperial system setting option. U-1 represents the imperial system (mile/h), and U-2 represents the metric system (km/h).

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button for parameter selection. Press the [switching] button to save the parameter and return to the general setting options interface.

Figure 6-3: Imperial System Setting Interface shows the imperial system selection.

Figure 6-4: Metric System Setting Interface shows the metric system selection.

7. General Parameter Setting

The steps for general parameter setting are as follows:

1. In the power-on state, when the display shows 0 speed, press and hold the [plus] and [minus] buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press and hold the [minus] and [switching] buttons simultaneously for over 2 seconds to enter the general parameter setting options interface.
3. Press the [plus] or [minus] button to switch functions, and press the [switching] button to enter the parameter modification interface.
4. Press the [plus] or [minus] button for parameter selection.
5. Press the [switching] button to save the parameter and proceed to the next general parameter setting option.
6. Press and hold the [switching] button to save the parameter and exit the general parameter setting options.

7.1 Wheel Diameter Setting

'Ld' refers to the wheel diameter setting option. Available parameters include: 8-26, 700C, 28-30 inches.

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button to select the wheel diameter corresponding to your e-bike for accurate speed and distance indication. Press the [switching] button to save the parameter and proceed to the next general parameter setting option.

Figure 7-1: Wheel Diameter Setting Interface shows the display for wheel diameter settings.

7.2 Speed Limit Setting

'LS' refers to the speed limit setting option. This allows you to set the maximum riding speed of your e-bike, with a selectable range from 12km/h to 40km/h.

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button to select the maximum riding speed. Press the [switching] button to save the parameter and proceed to the next general parameter setting option.

Figure 7-2: Speed Limit Setting Interface shows the display for speed limit settings.

8. Custom Setting

To meet individual rider requirements, custom setting options are available. These include battery level setting, assistance parameter setting, current limit setting, assistance sensor setting, speed sensor setting, handlebar function setting, system setting, and power-on password setting, totaling eight options. Please note that not all protocols support all custom setting options for the YL80C display; some protocols may only support a subset of these options.

Figure 8-1: Selection Interface of Custom Setting Options illustrates the main custom setting categories.

The steps for custom setting are as follows:

1. In the power-on state, when the display shows 0 speed, press and hold the [plus] and [minus] buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press and hold the [minus] and [switching] buttons simultaneously for over 2 seconds to enter the custom setting options interface.
3. Press the [plus] or [minus] button to switch functions, and press the [switching] button to enter the parameter modification interface.
4. Press the [plus] or [minus] button for parameter selection.
5. Press the [switching] button to save the parameter and proceed to the next parameter setting interface. Alternatively, press and hold the [switching] button to save the parameter and return to the custom setting options interface. To cancel the current operation without saving, press and hold the [minus] button for more than 2 seconds to return to the selection interface of custom setting options.
6. Press and hold the [switching] button to save the parameter and exit the custom setting options interface.

If no operations are performed for one minute, the display will automatically exit the setting interface.

8.1 Battery Level Setting

'VOL' refers to the battery level setting option. You will need to input the voltage values for sections 1-5 sequentially.

Press the [switching] button to enter the parameter modification interface. For example, to set the first battery level value to 36V, the display might show '1' for the section and '31.5' for the voltage value. Use the [plus] or [minus] buttons to change the value, and the [switching] button to confirm the setting and move to the next section's battery level parameter. After setting all five battery level values, press the [switching] button to confirm and return to the custom setting options interface.

Figure 8-2: Battery Level Setting Interface shows the display for setting battery levels.

8.2 Assistance Parameter Setting (option)

'SCR' refers to the assistance parameter setting option. Press the [switching] button to enter the parameter modification interface.

8.2.1 Assist Level Selection

The display supports various assist level configurations, including: levels 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, and 1-9.

Press the [plus] or [minus] button to switch between assist levels. Press the [switching] button to confirm the selected level mode and enter the 8.2.2 assistance ratio setting option, or press and hold the [switching] button to confirm the setting and return to the custom setting options interface.

Figure 8-3: Assist Level Selection Interface shows the selection of assist levels.

8.2.2 Assistance Ratio Setting Option

By adjusting the assistance ratio, you can fine-tune the speed for each assist level to suit different cyclists. Refer to Schedule 2 for default values. For instance, '45-55%' might represent the assistance ratio range for level 1, with '50%' being the default adjustable value.

Press the [plus] or [minus] button to modify the parameter. Press the [switching] button to confirm the setting and proceed to the next level's parameter setting interface. After all levels are set, press the [switching] button again to return to the custom setting options interface.

Figure 8-4: Assistance Ratio Setting Interface shows the display for setting assistance ratios.

8.3 Current Limit Setting

'CUr' refers to the current limit setting option. The current limit can be set within the range of 7.0-25.0A.

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button for parameter selection. Modify the maximum current of the controller and press the [switching] button to save the setting and return to the custom setting options interface.

Figure 8-5: Current Limit Setting Interface shows the display for current limit settings.

8.4 Assistance Sensor Setting (option)

'PAS' refers to the assistance sensor setting option. Press the [switching] button to enter the parameter modification interface.

8.4.1 Assistance Sensor Direction Setting

'run' refers to the assistance sensor direction setting option. The display shows 'run-F' for forward direction and 'run-b' for backward direction.

Press the [plus] or [minus] button to select an assistance sensor direction. Press the [switching] button to confirm the parameter and enter the 8.4.2 assistance sensor sensitivity setting option, or press and hold the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-6: Assistance Sensor Direction Setting Interface shows the display for setting sensor direction.

8.4.2 Assistance Sensor Sensitivity Setting

'SCN' refers to the assistance sensor sensitivity setting option. The setting range is 2-9, where 2 indicates maximum sensitivity and 9 indicates minimum sensitivity.

Press the [plus] or [minus] button to select the assistance sensor sensitivity. Press the [switching] button to confirm the parameter and enter the 8.4.3 steel magnet number setting option for assistance magnetic disk, or press and hold the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-7: Assistance sensor sensitivity setting interface shows the display for sensitivity settings.

8.4.3 Steel Magnet Number Setting for Assistance Magnetic Disk

'n-' refers to the steel magnet number setting option for the assistance magnetic disk. The setting range is 5-9, 12, 24.

Press the [plus] or [minus] button to select the corresponding number of steel magnets for assistance. Press the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-8: Steel Magnet Number Setting Interface for Assistance Magnetic Disk shows the display for setting the number of steel magnets.

8.5 Speed Sensor Setting

'SPS' refers to the speed sensor setting option, which can be configured based on the number of magnetic heads installed on your e-bike's wheels. The setting range is 1-15.

Press the [switching] button to enter the parameter modification interface. Press the [plus] or [minus] button for parameter selection. Press the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-9: Steel Magnet Selection Interface for Speed Sensor shows the display for speed sensor settings.

8.6 Handlebar Function Setting (option)

'Hnd' refers to the handlebar function setting option. Press the [switching] button to enter the parameter modification interface.

8.6.1 Handlebar Push Assistance Enable Setting

'HL' refers to the handlebar push assistance enable setting. 'HL-N' means the push assistance function is enabled, and 'HL-Y' means it is disabled. When enabled (HL-N), turning the handlebar activates push assistance.

Press the [plus] or [minus] button to select a parameter. If 'HL-Y' is selected, press the [switching] button to confirm and return to the custom setting options interface. If 'HL-N' is selected, press the [switching] button to confirm the parameter and enter the 8.6.2 handlebar assist level enable setting option, or press and hold the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-10: Handlebar Push Assistance Setting Interface shows the display for handlebar push assistance settings.

8.6.2 Handlebar Assist Level Enable Setting

'HF-Y' refers to the handlebar assist level enabling option. 'HF-N' means the assist level function of the handlebar is disabled. If 'HF-Y' is selected, turning the handlebar will limit the speed to the value corresponding to the current assist level shown on the display. If 'HF-N' is selected, turning the handlebar allows the e-bike to reach its rated maximum speed without being restricted by the assist level.

Press the [plus] or [minus] button to select the handlebar assist level status, and press the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-11: Handlebar Assist Level Enable Setting Interface shows the display for handlebar assist level settings.

8.7 System Setting (option)

'SYS' refers to the system setting option. Press the [switching] button to enter the parameter modification interface.

8.7.1 Battery Delay Time Setting

'dLY' refers to the battery delay time setting option. There are 3 parameters available: 3s, 6s, and 12s.

Press the [plus] or [minus] button for parameter selection. Press the [switching] button to confirm the parameter and enter the 8.7.2 button push assistance enable setting option, or press and hold the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-12: Battery Delay Time Selection Interface shows the display for battery delay time settings.

8.7.2 Button Push Assistance Enable Setting

'PUS' refers to the button push assistance enable setting. 'Y' represents enable, and 'N' represents disable.

Press the [plus] or [minus] button for parameter selection, and press the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-13: Button Push Assistance Enable Setting Interface shows the display for button push assistance settings.

8.8 Power-on Password Setting (option)

'PSd' refers to the power-on password setting option. 'P2' represents the power-on password setting option. The default power-on password is: 1212.

Press the [switching] button to enter the power-on password setting interface. Press the [plus] or [minus] button for parameter selection, and press the [switching] button to move the cursor. After the 4-digit password is input, press the [switching] button to confirm the parameter. If the password is correct, the display will enter the 8.8.1 power-on password enable setting option; otherwise, it will remain in the password input interface.

Figure 8-14: Power-on Password Input Setting Interface shows the interface for entering the power-on password.

8.8.1 Power-on Password Enable Setting

By inputting the password, you can access the password enable setting option. 'PSd-Y' means a power-on password is required, and 'PSd-N' means no power-on passwords are required.

Press the [plus] or [minus] button for parameter selection. If you select 'PSd-N', press the [switching] button to confirm the parameter and return to the custom setting options interface. If you select 'PSd-Y', press the [switching] button to enter the 8.8.2 power-on password modification setting option, or press and hold the [switching] button to confirm the parameter and return to the custom setting options interface.

Figure 8-15: Password Enable Confirmation Interface shows the display for password enable confirmation.

8.8.2 Power-on Password Modification Setting

'P3' refers to the power-on password modification setting option. Press the [switching] button for cursor movement and the [plus] or [minus] button for parameter selection. After modification, press and hold the [switching] button to save and confirm the parameter, then return to the custom setting options interface. If the display is rebooted, it will show 'P1, 0000', and will not function normally until the correct password is entered.

Figure 8-16: Password Modification Interface shows the display for password modification.

9. Restore Default Settings

'dEF' refers to the setting option for restoring default parameters. 'dEF-Y' means the default settings need to be restored, and 'dEF-N' means no restoration is needed.

In the normal display interface, press and hold the [plus] and [minus] buttons simultaneously for more than 2 seconds to enter the restore default settings interface. Switch the parameter by pressing the [plus] or [minus] button. If you choose 'Y', press and hold the [switching] button for more than 2 seconds to confirm. The display will show 'dEF-0' and begin restoring default settings. Upon completion, it will automatically exit and return to the normal display interface.

Figure 9-1: Interface of Restore Default Settings shows the display for restoring default settings.

10. Quality Commitments and Warranty Scope

10.1 Warranty Information

• For faults caused by product quality under normal use, the Company will provide a limited warranty during the warranty period.
• The warranty period for the product is within 12 months from the date of delivery.

10.2 Non-Warranty Scope

• The enclosure is opened.
• The connector is damaged.
• The enclosure is scratched or damaged after delivery.
• The outgoing line of the display is scratched or broken.
• Faults or damage caused by force majeure (e.g., fires, earthquakes) or natural disasters (e.g., lightning strikes).
• The warranty period has expired.

11. Outgoing Line Connection Diagram

11.1 Wiring Sequence of Standard Connector

Figure 8-1: Outgoing Line Connection Diagram illustrates the wiring sequence of the standard connector. It shows three views: the connecting terminal to the controller (5 pins), the leading-out terminal of display (circular connector with 5 pins), and a connecting terminal (circular connector with 5 pins).

Table 8-1: Wiring Sequence of Standard Connector details the standard wiring sequence, wire color, and function:

Note: Some products use waterproof connectors, making the wire colors inside the harnesses not visible.

12. Considerations

• Please use the display safely and avoid plugging or unplugging it while powered on.
• Avoid bumping the display as much as possible.
• Do not alter the display's background parameter settings arbitrarily, as this may affect normal riding.
• If the display malfunctions, it should be repaired promptly.
• Due to product upgrades, some displayed content or functions may differ from this manual depending on the specific model purchased.

Schedule 1: Error Code Definitions

Error codes for protocols YL-01 and YL-02:

Error codes for protocols YL-05, KDS and YL-J:

Schedule 2: Assist Level Ratio Default Values

This table shows default assist level ratios for different assist level configurations.

For support, please contact: Email: service@engwe-bikes.com