1. Introduction
The Yolin YL80C-K5 is a color LCD display designed for electric bicycles, providing essential riding information and control functionalities. This manual provides detailed instructions for the installation, operation, and maintenance of your YL80C display. It is compatible with 36V and 48V e-bike systems and supports various features to enhance your riding experience.

2. Safety Information
- Always ensure the e-bike is powered off before performing any installation or maintenance.
- Avoid exposing the display to extreme temperatures, direct sunlight for prolonged periods, or harsh chemicals.
- Do not attempt to open or modify the display unit, as this may void the warranty and cause damage.
- Ensure all connections are secure and waterproof to prevent electrical issues.
- Consult a professional e-bike technician if you are unsure about any installation or wiring procedures.
3. Package Contents
The package typically includes:
- 1 x YL80C-K5 EBike Display (with waterproof connector)
- (Optional: Remote control unit, depending on the specific kit purchased)

4. Specifications
| Feature | Specification |
|---|---|
| Model | YL80C-K5 |
| Type | Display |
| Voltage | 36V / 48V |
| Material | ABS, LCD |
| Rated Working Current | 15 mA |
| Maximum Working Current | 30 mA |
| Shutdown Leakage Current | <1 uA |
| Supply Current to Controller | 50 mA |
| Operating Temperature | -20°C to 60°C |
| Storage Temperature | -30°C to 70°C |
| Item Weight | 160g |
| Compatible Model | UART/CAN (protocol dependent) |
| Dimensions (approx.) | Height: 94.9mm, Width: 58.2mm, Depth: 65.5mm |
| Clamp Diameter | 31.8mm |

5. Product Overview
The YL80C display provides a clear interface for monitoring your e-bike's status and controlling various functions. Refer to the diagram below for an overview of the display's indicators and controls.

- Battery Level Display: Shows the current charge level of your e-bike battery.
- Headlamp Indicator: Illuminates when the e-bike's headlights are active.
- Fault Indication (ERROR): Displays error codes if a system malfunction occurs.
- Speed Display: Shows real-time speed, maximum speed, or average speed (switchable).
- Gear Indicator: Indicates the current assisted gear level.
- Speed and Mileage Display: Shows various mileage data such as Trip distance (TRIP), Odometer (ODO), Maximum Speed (MAXS), and Average Speed (AVG).
- Numerical Display: General area for displaying numerical values.
- Unit Display: Indicates the unit of measurement (e.g., km/h, mph).
6. Setup and Installation
Important Compatibility Note: The YL80C-K5 display operates on specific LCD Display protocols. It is crucial to verify compatibility with your e-bike's controller before installation. Different e-bike brands may use different protocols. If you are replacing an existing display, please locate the serial number or protocol information on the back of your old display and consult with your e-bike manufacturer or the seller to ensure compatibility.

Installation Steps:
- Power Off: Ensure your e-bike is completely powered off and the battery is disconnected before starting installation.
- Mounting: Securely attach the YL80C display to your e-bike's handlebars. The display is designed for a 31.8mm clamp diameter. Adjust the angle for optimal visibility.
- Connect Cables: Connect the display's waterproof 5-pin connector to the corresponding port on your e-bike's controller or wiring harness. Ensure the connection is firm and fully seated to maintain its waterproof integrity.
- Optional Remote Control: If your kit includes a remote control unit, connect it to the appropriate port on the display or wiring harness.
- Cable Management: Route and secure all cables to prevent interference with moving parts and protect them from damage.
- Power On: Reconnect the e-bike battery and power on the system to test the display.

7. Operating Instructions
Once installed and powered on, the YL80C display provides intuitive control over your e-bike's functions.
Basic Operations:
- Power On/Off: Press and hold the power button (usually located on the remote control or display itself) to turn the display and e-bike system on or off.
- Assisted Gear Adjustment: Use the '+' and '-' buttons on the remote control or display to cycle through the assisted gear levels. The current gear will be indicated on the display.
- Headlight Control: A dedicated button (often marked with a light icon) on the remote control or display can be used to turn the e-bike's headlights on or off. The headlamp indicator on the display will confirm its status.
- Assisted Push Control: For walking assistance, press and hold the designated button (often marked with a walking icon). The e-bike will move at a low, constant speed. Release the button to stop.
- Display Information Toggle: Short press a specific button (e.g., 'M' or 'SET') to cycle through different display modes, such as real-time speed, maximum speed, average speed, trip distance, and total odometer.
- USB Connection: The display features a USB port, typically for charging small electronic devices or for diagnostic purposes.
8. Personalized Parameter Settings
The YL80C display allows for customization of various e-bike parameters to suit your preferences and local regulations. Accessing these settings typically involves a specific button combination or menu navigation sequence (refer to your e-bike's main manual or consult the seller for exact steps).
Adjustable Parameters may include:
- Wheel Diameter: Setting the correct wheel diameter is crucial for accurate speed and mileage readings.
- Speed Limit: Adjust the maximum assisted speed according to local laws and personal preference.
- Battery Power Setting: Configure settings related to battery voltage and capacity for accurate battery level indication.
- Power Assisting Parameter Setting: Fine-tune how the motor assists your pedaling.
- Power-on Password Setting: Enhance security by setting a password to activate the e-bike system.
- Controller Current Limit Setting: Adjust the maximum current supplied to the motor.
Caution: Incorrectly adjusting certain parameters can affect e-bike performance, safety, or legality. Always understand the function of each setting before making changes. If in doubt, consult a qualified technician.
9. Troubleshooting
The YL80C display is designed to indicate system faults through error codes. If you encounter an issue, check the display for any error messages.
Common Issues and Solutions:
- Display Not Powering On:
- Check if the e-bike battery is charged and properly connected.
- Ensure all display cables are securely connected to the controller.
- Verify the power button is functioning correctly.
- Inaccurate Speed/Mileage Readings:
- Confirm that the wheel diameter setting in the display's parameters is correct.
- Check the speed sensor and its magnet for proper alignment and function.
- Error Codes Displayed:
- Note down the specific error code.
- Consult your e-bike's main user manual or contact the seller/manufacturer with the error code for diagnosis and resolution.
- Display Not Responding to Controls:
- Check the connection of the remote control unit (if applicable).
- Ensure the display is not in a locked mode (e.g., power-on password).
- Compatibility Issues:
- If the display does not function after installation, it may be due to an incompatible communication protocol. Refer to the "Setup and Installation" section regarding protocol verification.
10. Maintenance
- Cleaning: Wipe the display screen and body with a soft, damp cloth. Do not use abrasive cleaners, solvents, or spray water directly onto the display.
- Storage: When not in use for extended periods, store the e-bike and display in a dry, temperate environment, away from direct sunlight.
- Cable Inspection: Periodically check all cables and connectors for signs of wear, damage, or corrosion. Ensure they remain securely connected.
11. User Tips
- Verify Protocol: Before purchasing or installing, always confirm the LCD Display protocol of your e-bike's controller matches the YL80C-K5. This is the most common reason for incompatibility.
- Serial Number for Support: If you need to replace an existing display, take a photo of the serial number on the back of your old display. This information is vital for customer service to help you find a compatible replacement.
- Speed Limit Adjustments: Be aware that adjusting speed limits may be subject to local regulations. Always ride responsibly and within legal limits.
- Remote Control: Some e-bike setups might require a separate remote control unit for full functionality. Ensure you have the necessary components for your specific e-bike model.
12. Warranty and Support
For warranty information, technical support, or assistance with troubleshooting, please contact the seller or your e-bike manufacturer. Provide your product model (YL80C-K5) and any relevant serial numbers or purchase details when seeking support.





