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°C to 60°C
• Storage temperature: -30°C to 70°C

3. Appearance and Dimensions

The YL80C display features a clear LCD screen and control buttons. The display unit is mounted on the handlebar.

Front View: The front view shows the main display area with speed, battery level, and other indicators. Dimensions are approximately 95mm (height) x 58.5mm (width).

Side View: The side view illustrates the mounting mechanism for the handlebar, with dimensions indicating its profile and clamp diameter.

Buttons: The display unit has five buttons for operation: Power/On-Off (?), Plus (➕), Minus (➖), Headlight (?), and Switching (?).

4. Function Overview and Functional Area Layout

4.1 Function Overview

The YL80C display offers a comprehensive set of functions to enhance your e-bike riding experience:

• Battery level indicator
• Motor power indicator
• Assist level adjustment and indication
• Speed indicator (real-time speed, maximum speed, 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

The display interface is divided into several functional areas:

• Battery level indicator: Shows the remaining battery charge.
• Fault indicator: Alerts the user to system errors.
• Speed indicator: Displays current speed, maximum speed, and average speed.
• Assist level indicator: Shows the current motor assist level.
• Push assistance indicator: Indicates when push assistance is active.
• Numeric indicator: Displays various numerical data like speed, distance, etc.
• Headlight indicator: Shows the status of the e-bike's headlights.
• Bluetooth connection indicator: Indicates Bluetooth connectivity status.
• USB connection indicator: Shows USB connection status.
• Speed unit indicator: Displays the unit for speed (km/h or mile/h).
• Metric system: Displays speed in km/h.
• Imperial system: Displays speed in mile/h.
• Trip distance indicator: Shows the distance traveled since the last reset.
• ODO: Displays the total accumulated distance.
• Maximum speed indicator: Records the highest speed achieved.
• Average speed indicator: Shows the average speed over a period.
• Unit indicator: General unit display.

5. General Operation

5.1 Power On/Off

To power on the display and the e-bike's controller, press and hold the power button (?). To power off, press and hold the power button (?) again. When powered off, the display's leakage current is less than 1uA. The display automatically powers off if the e-bike is not used for more than 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 different information displays: trip distance (km), ODO (km), maximum speed (km/h), average speed (km/h), and riding power.

Display Interface Switching Example: The display transitions between showing Trip Distance, ODO, Maximum Speed, Riding Power, and Average Speed.

5.3 Push Assistance

Press and hold the push assistance button (e.g., ➕) to activate the electric push assistance mode. The e-bike will maintain a constant speed of 6 km/h, indicated by a specific icon on the display. Releasing the button stops power output and returns the e-bike to its previous state. This function is intended for pushing the e-bike, not for riding.

5.4 Headlight On/Off

Press the headlight button (?) to turn on the headlights and dim the display backlight. Pressing the headlight button (?) again turns off the headlights, and the display backlight returns to its normal brightness.

5.5 Assist Level Selection

Use the plus (➕) and minus (➖) buttons to cycle through and select different motor assist levels, adjusting the motor output power.

5.6 Battery Level Indicator

The battery level is indicated by five segments. All segments are illuminated 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.

Battery Level Indications: Displays show full battery, 4-segment, 3-segment, 2-segment, and 1-segment indications, as well as undervoltage flashing.

5.7 Motor Power Indicator

The display shows the motor's output 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 of these error codes are provided in Schedule 1. It is important to address errors promptly to ensure normal operation.

6. General Setting

All parameters can only be adjusted when the e-bike is stationary (speed is 0). The general setting procedure is as follows:

1. Press and hold the ➕ and ➖ buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press the ? button to navigate through general setting options, and press the ✅ button to enter the parameter modification interface.
3. Use the ➕ or ➖ buttons for parameter selection.
4. Press the ✅ button to save the parameter and return to the general setting options interface.
5. Press and hold the ✅ button to save the parameter and exit the general setting interface.

6.1 Trip Distance Reset

The 'tC' option allows for resetting the trip distance. 'tC-n' means the trip distance will not be reset, while 'tC-y' means it will be reset. To reset, enter the parameter modification interface using the ✅ button, select 'tC-y' using the ➕ or ➖ buttons, and then press the ✅ button to save.

6.2 Backlight Luminance Setting

The 'bL' option adjusts the backlight luminance. Available settings are bL-1 (minimum), bL-2 (standard), and bL-3 (maximum). Navigate to the parameter modification interface using the ✅ button, select the desired level using the ➕ or ➖ buttons, and press the ✅ button to save.

6.3 Metric/Imperial System Setting

The 'Un' option allows switching between metric and imperial systems. 'U-1' selects the imperial system (mile/h), and 'U-2' selects the metric system (km/h). Enter the parameter modification interface with the ✅ button, choose the system with the ➕ or ➖ buttons, and press the ✅ button to save.

7. General Parameter Setting

General parameter settings can be adjusted when the e-bike speed is 0. The steps are:

1. Press and hold the ➕ and ➖ buttons simultaneously for over 2 seconds to enter the general setting options interface.
2. Press and hold the ➖ and ✅ buttons simultaneously for over 2 seconds to enter the general parameter setting options interface.
3. Press the ? button to switch functions, and the ✅ button to enter parameter modification.
4. Use the ➕ or ➖ buttons for parameter selection.
5. Press the ✅ button to save the parameter and proceed to the next setting.
6. Press and hold the ✅ button to save and exit all general parameter settings.

7.1 Wheel Diameter Setting

The 'Ld' option sets the wheel diameter. Available parameters include 8-26 inches, 700C, and 28-30 inches. This setting is crucial for accurate speed and distance readings. Enter the parameter modification interface with the ✅ button, select the correct wheel diameter using the ➕ or ➖ buttons, and press the ✅ button to save and move to the next setting.

7.2 Speed Limit Setting

The 'LS' option sets the maximum riding speed for your e-bike, ranging from 12 km/h to 40 km/h. Enter the parameter modification interface with the ✅ button, select the desired speed limit using the ➕ or ➖ buttons, and press the ✅ button to save and proceed.

8. Custom Setting

Custom setting options allow users to tailor the display's behavior to their specific needs. These include settings for battery level, assistance parameters, current limit, sensor settings, handlebar functions, system settings, and power-on password. Note that not all protocols support all custom setting options.

The custom setting interface displays various options such as VOL (Battery Level), SCR (Assistance Parameter), CUr (Current Limit), PAS (Assistance Sensor), SPS (Speed Sensor), Hnd (Handlebar Function), SYS (System Setting), and PSd (Power-on Password).

Custom Setting Steps:

1. With the e-bike stopped (speed 0), press and hold the ➕ and ➖ buttons for over 2 seconds to enter general settings.
2. Press and hold the ➖ and ✅ buttons for over 2 seconds to enter custom setting options.
3. Use the ? button to switch functions and the ✅ button to enter parameter modification.
4. Use the ➕ or ➖ buttons for parameter selection.
5. Press the ✅ button to save and move to the next setting, or press and hold the ✅ button to save and return to the custom setting options interface. Press and hold the ? button for over 2 seconds to cancel without saving.
6. Press and hold the ✅ button to save and exit custom settings. The display will automatically exit if no operation is performed for one minute.

8.1 Battery Level Setting

The 'VOL' option lets you input voltage values for 5 battery sections. For example, to set the first section's voltage, enter the modification interface, set the value (e.g., 31.5V for a 36V system), and confirm with the ✅ button. After setting all 5 sections, confirm to save and return to the custom settings menu.

8.2 Assistance Parameter Setting (Option)

The 'SCR' option configures assistance parameters. This includes selecting the assist level (e.g., 0-3, 1-5, 0-9, 1-9). Use the ➕ or ➖ buttons to change the level and the ✅ button to confirm and proceed to the assistance ratio setting.

8.2.1 Assist Level Selection

Available assist levels include: 0-3, 1-3, 0-5, 1-5, 0-7, 1-7, 0-9, and 1-9.

8.2.2 Assistance Ratio Setting Option

This setting allows adjustment of the motor output power for each assist level. For instance, level 1 might have an assistance ratio range of 45-55%, with a default of 50%. Use the ➕ or ➖ buttons to modify the ratio and the ✅ button to confirm and move to the next level's settings.

8.3 Current Limit Setting

The 'CUr' option sets the controller's current limit, adjustable from 7.0A to 25.0A. Enter the modification interface with the ✅ button, select the desired current limit using the ➕ or ➖ buttons, and press the ✅ button to save.

8.4 Assistance Sensor Setting (Option)

The 'PAS' option configures the assistance sensor. This includes setting the sensor direction and sensitivity.

8.4.1 Assistance Sensor Direction Setting

The 'run' setting determines the sensor direction: 'run-F' for forward direction and 'run-b' for backward direction. Use the ➕ or ➖ buttons to select the direction and the ✅ button to confirm.

8.4.2 Assistance Sensor Sensitivity Setting

The 'SCN' option adjusts the assistance sensor sensitivity, with a range from 2 (maximum sensitivity) to 9 (minimum sensitivity). Use the ➕ or ➖ buttons to select the sensitivity and the ✅ button to confirm.

8.4.3 Steel Magnet Number Setting for Assistance Magnetic Disk

The 'n-' option sets the number of steel magnets for the assistance magnetic disk. The range is 5-9, 12, or 24. Select the number using the ➕ or ➖ buttons and confirm with the ✅ button.

8.5 Speed Sensor Setting

The 'SPS' option configures the speed sensor based on the number of magnetic heads on the e-bike's wheels. The setting range is 1-15. Use the ➕ or ➖ buttons to select the value and the ✅ button to confirm.

8.6 Handlebar Function Setting (Option)

The 'Hnd' option customizes handlebar functions.

8.6.1 Handlebar Push Assistance Enable Setting

The 'HL' setting enables or disables handlebar push assistance. 'HL-N' means the function is enabled (push assistance activates by turning the handlebar), while 'HL-Y' means it is disabled. Select using ➕ or ➖ and confirm with the ✅ button.

8.6.2 Handlebar Assist Level Enable Setting

The 'HF' setting controls how the handlebar affects assist levels. 'HF-N' disables the handlebar assist level function, allowing the e-bike to reach maximum speed regardless of the displayed assist level when turning the handlebar. 'HF-Y' restricts the speed to the displayed assist level when turning the handlebar. Select using ➕ or ➖ and confirm with the ✅ button.

8.7 System Setting (Option)

The 'SYS' option accesses system settings.

8.7.1 Battery Delay Time Setting

The 'dLY' option sets the battery delay time. Available options are 3s, 6s, and 12s. Use the ➕ or ➖ buttons to select and the ✅ button to confirm.

8.7.2 Button Push Assistance Enable Setting

The 'PUS' option enables or disables button push assistance. 'Y' represents enable, and 'N' represents disable. Select using ➕ or ➖ and confirm with the ✅ button.

8.8 Power-on Password Setting (Option)

The 'PSd' option sets a power-on password. The default password is '1212'. Enter the password modification interface using the ✅ button, use ➕ or ➖ to select digits, and the ✅ button to move the cursor. After entering the 4-digit password, confirm with the ✅ button. If correct, it proceeds to the password enable setting; otherwise, it returns to the input interface.

8.8.1 Power-on Password Enable Setting

This setting determines if a power-on password is required. 'PSd-Y' requires a password, while 'PSd-N' disables it. Select using ➕ or ➖ and confirm with the ✅ button. If 'PSd-N' is selected, it returns to the custom settings. If 'PSd-Y' is selected, it proceeds to password modification.

8.8.2 Power-on Password Modification Setting

The 'P3' option allows modification of the power-on password. Use the ✅ button for cursor movement and ➕ or ➖ for parameter selection. After modification, press and hold the ✅ button to save. If the display reboots, it will prompt for the correct password.

9. Restore Default Settings

The 'dEF' option restores default parameters. 'dEF-Y' initiates restoration, while 'dEF-N' cancels it. To access this, press and hold the ➕ and ➖ buttons simultaneously for over 2 seconds from the normal display. Select 'Y' or 'N' using the ➕ or ➖ buttons. Confirm 'Y' by pressing and holding the ✅ button for over 2 seconds. The display will show 'dEF-0' during restoration and then return to the normal interface.

10. Quality Commitments and Warranty Scope

10.1 Warranty Information

The Company provides a limited warranty for faults caused by product quality under normal use. The warranty period is 12 months from delivery.

10.2 Non-Warranty Scope

The warranty does not cover:

• Enclosure opened
• Damaged connector
• Scratched or damaged enclosure after delivery
• Scratched or broken outgoing display line
• Faults or damage due to force majeure (fire, earthquake, natural disasters)
• Expired warranty period

11. Outgoing Line Connection Diagram

This section details the wiring sequence of the standard connector for the display to the controller.

Wiring Sequence of Standard Connector:

Note: Some products use waterproof connectors, obscuring wire colors within the harness.

12. Considerations

Important usage guidelines:

• Use the display safely. Do not plug or unplug it while powered on.
• Avoid bumping the display.
• Do not alter background parameter settings arbitrarily, as it may affect normal riding.
• If the display malfunctions, seek repair promptly.
• Product upgrades may result in minor differences between the manual and the actual product.

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 the default assist level ratios for different assist level selections.

For inquiries, contact: service@engwe-bikes.com