1. Product Overview
The Yolin YL-80C is an intelligent LCD display designed for electric bicycles, providing essential riding data and control functions. It is compatible with 24V, 36V, and 48V e-bike systems and is suitable for various e-bike applications.

Figure 1: YL-80C LCD Display mounted on a handlebar.
Video 1: Overview of the YL-80C display unit and its connectors.
2. Setup and Installation
Important Note: This product is customized. After placing your order, it is crucial to contact the seller immediately to provide your specific electric bicycle information. Failure to do so may result in the product being produced to regular specifications, which might not be compatible with your e-bike.
2.1 Package Contents
- Yolin YL-80C LCD Display Unit
- Integrated Control Buttons
- Connecting Cable with Green Connector
2.2 Installation Steps
- Mount the Display: Securely attach the YL-80C display unit to your e-bike's handlebar using the integrated clamps. Ensure it is positioned for optimal visibility and accessibility.
- Mount Control Buttons: Attach the control button unit to the handlebar next to the display, ensuring comfortable reach for operation.
- Connect Cables: Connect the display unit to your e-bike's controller system. The display features a specific green connector for this purpose. Ensure all connections are firm and secure. Refer to your e-bike's wiring diagram for precise connection points.
- Initial Power-On: Once installed, power on your e-bike to check if the display activates correctly.

Figure 2: YL-80C display showing the green connector for system integration.
3. Operating Instructions
The YL-80C display provides real-time information about your e-bike's performance and allows for adjustment of certain settings.
3.1 Display Functions
The LCD screen typically shows the following information:
- Battery Level: Indicated by a battery icon with bars.
- Speed: Current speed in km/h or mph.
- Gear Position: Current assist level (e.g., 1, 2, 3).
- Trip Distance (TRIP): Distance covered in the current ride.
- Total Mileage (ODO): Total distance covered by the e-bike.
- Maximum Speed (MAXS): Highest speed recorded during the current ride.
- Average Speed (AVG): Average speed during the current ride.

Figure 3: YL-80C display showing various metrics and an error code.

Figure 4: Close-up of the gear display function.
3.2 Control Buttons
The integrated control buttons (typically '+' and '-') are used to navigate menus and adjust settings such as assist levels or display modes (km/h vs. mph). Consult your e-bike's specific controller manual for detailed button functionality.

Figure 5: Detail of the '+' and '-' control buttons.
4. Maintenance
Proper maintenance ensures the longevity and optimal performance of your YL-80C display.
- Cleaning: Use a soft, damp cloth to clean the display screen. Avoid abrasive cleaners or solvents that could damage the screen or casing.
- Water Resistance: The display has an IP65 waterproof rating, meaning it is protected against dust ingress and low-pressure water jets from any direction. While it can withstand splashes and light rain, avoid submerging the unit in water.
- Temperature: Operate and store the display within the specified temperature ranges to prevent damage.
5. Troubleshooting
If you encounter issues with your YL-80C display, refer to the following common problems and solutions:
- Display Not Turning On:
- Check all cable connections, especially the main power connector, to ensure they are secure.
- Verify that your e-bike's battery is charged and properly connected. - Display Showing 'ERROR 88.8' or Other Error Codes:
- This typically indicates a communication issue or a fault within the e-bike system. Refer to your e-bike's main controller manual for specific error code meanings.
- Try restarting the e-bike system by turning it off and on again. - Inaccurate Speed/Mileage Readings:
- Ensure the wheel size setting in your e-bike's controller (if adjustable via the display) is correctly configured. - Buttons Unresponsive:
- Check for any physical obstructions or damage to the buttons.
- Ensure the control button unit is securely connected to the display.
If problems persist, contact the seller or a qualified e-bike technician for assistance.
6. Specifications
| Feature | Specification |
|---|---|
| Model | YL-80C |
| Brand | Yolin / KEY-DISP |
| Power Supply | 24V/36V/48V |
| Rated Working Current | 10mA |
| Maximum Working Current | 30mA |
| Off-state Leakage Current | <1μA |
| Working Temperature | -20℃ ~ 60℃ |
| Storage Temperature | -30℃ ~ 70℃ |
| Waterproof Rating | IP65 |
| Color | Black |
| Design | Brushless |
| Wattage | 501 - 1000W |
| Meter Functions | Gear position display, single mileage display, total mileage display, speed display |
7. Warranty and Support
The seller strives to provide satisfactory service. If you receive a defective or damaged product, or if there is any fault from the seller's side, you may be eligible for a refund if the goods are returned within 15 days of receipt. Please take photos or videos of any defective products and contact the seller immediately. Returned items must remain in the same condition as received.
For any questions or problems, please contact the seller directly for assistance. They will work to resolve issues promptly.
8. User Tips
- Customization is Key: As this is a customized product, always communicate your e-bike's specific details (e.g., controller model, battery voltage, current limit) to the seller immediately after ordering to ensure compatibility.
- Compatibility Check: Before purchase, verify if the YL-80C display is compatible with your e-bike's controller and battery voltage (24V/36V/48V). Some users have inquired about compatibility with specific models like 'Engwe Engine X' or controllers like 'X008-AXC002A' with 48V battery, 39V cutoff, and 22A current limit. Confirm these details with the seller if you have a specific setup.
- Monitor for Errors: Pay attention to any error codes displayed on the screen, such as 'ERROR 88.8', and consult your e-bike's main manual for their meaning and troubleshooting steps.





