1. Introduction
The AED2-SCIWIL SR-M818X is an advanced LCD display designed for electric bicycles. It provides essential riding data and control functions, featuring a 4-inch screen with light sensing capabilities and a waterproof design for durability in various conditions. This manual will guide you through the installation, operation, and maintenance of your SR-M818X display.
2. Setup
The SR-M818X display connects to your e-bike's controller via a waterproof connector. Ensure proper wiring according to the pinout diagram provided below. The display unit is typically mounted on the handlebars. Ensure the connection is secure and the display is positioned for optimal visibility.
Figure 1: Waterproof Connector Pinout Diagram
| Pin | Wire Color | Function |
|---|---|---|
| 1 | Red | VCC instrument power cord |
| 2 | Blue | Kp controller power control line |
| 3 | Black | GND instrument ground wire |
| 4 | Green | Data receiving line (RX meter) |
| 5 | Yellow | TX instrument data transmission line |
3. Operating Instructions
The SR-M818X display provides various functions accessible via its integrated control unit.
Figure 2: Control Unit Button Layout
Basic Functions:
- On/Off: Press the power button to turn the display on or off.
- Assist Level Control: Use the "Plus" (+) and "Minus" (-) buttons to adjust the assist level (3, 5, or 9 levels, depending on configuration).
- Front Light: Press the "Front Light" button to control the e-bike's front light (if supported by the controller).
- Info: Press the "Info" button to cycle through various display information such as single-trip distance (TRIP) and total travel distance (ODO).
- Walk Assist: Activate walk assist mode using the dedicated button.
Display Information:
- Speed: Current speed displayed in km/h or mph.
- Battery Indication: Shows battery level percentage and low voltage warnings.
- Assist Level: Indicates the current pedal assist level.
- Distance: Tracks single-trip distance (TRIP) and total travel distance (ODO).
- Riding Info: Displays braking status, front light status, cruise control status, and low voltage warnings.
- Error Code Indication: The display will show error codes if issues are detected.
Advanced Features (Optional, if supported by controller):
- Boot Password: If enabled, a password may be required to start the system.
- System Unit Switch: Change speed and distance units between km/h and mph.
- Turning Signals: If integrated with the controller, turning signal status may be displayed.
- Dual Drive Control and Display: For e-bikes with dual motor systems.
- Double Battery Packs Status: Displays status for e-bikes with two battery packs.
- NFC Function: For specific functionalities using NFC technology.
- Bluetooth Connection: Allows for OTA (Over-The-Air) firmware upgrades via a mobile phone application.
4. Maintenance
The SR-M818X display is designed to be durable and waterproof, ensuring reliable performance in various riding conditions.
Figure 3: Waterproof Design of the SR-M818X
- Cleaning: Wipe the screen and unit with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the display or casing.
- Temperature: Operate and store the display within the specified temperature ranges (-20℃ to 60℃ for operation, -30℃ to 70℃ for storage) to ensure optimal performance and longevity.
- Connections: Periodically check all electrical connections to ensure they are secure and free from dirt or corrosion.
- Water Resistance: While waterproof, avoid submerging the unit for extended periods or exposing it to high-pressure water jets, which could compromise its seals.
5. Troubleshooting
If you encounter issues with your SR-M818X display, consider the following common troubleshooting steps:
- No Power: Ensure the e-bike battery is charged and all electrical connections, especially the power cord (Red VCC) and ground wire (Black GND), are securely connected.
- Display Not Responding: Check the controller power control line (Blue Kp) and the data transmission lines (Green RX, Yellow TX) for proper connection.
- Error Codes: The display is equipped with an error code indication system. If an error code appears, refer to your e-bike's main controller manual for specific interpretations or contact customer support.
- Inaccurate Readings: Verify that the wheel size and other relevant settings in your e-bike controller are correctly configured, as these can affect speed and distance accuracy.
If problems persist after attempting these steps, please contact customer support for further assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Model | SR-M818X |
| Protocol | Lithium battery No. 2 protocol |
| Screen Size | 4.0 Inch LCD |
| Working Voltage | DC24V/36V/48V/60V/72V |
| Rated Working Current | 12mA |
| Leakage Current | Less than 1uA |
| Working Temperature | -20℃ to 60℃ |
| Storage Temperature | -30℃ to 70℃ |
| Material | Plastic |
| Color | Black |
| Connector Type | Sm Connector/Waterproof Connector |
| Package Contents | 1 x Bike LCD Display |
7. User Tips
Based on available product information, here are some general tips for optimizing your experience with the SR-M818X e-bike display:
- Familiarize yourself with the button layout (Figure 2) for quick and intuitive access to functions while riding, enhancing safety and convenience.
- Regularly check your battery percentage displayed on the screen to plan your rides effectively and avoid unexpected power loss.
- Utilize the "Info" button to monitor your single-trip distance (TRIP) and total mileage (ODO), which can be useful for tracking fitness goals or maintenance schedules.
- If your e-bike system supports it, consider enabling the boot password feature for added security against unauthorized use.
- Take advantage of the light sensing function for automatic backlight adjustment, ensuring optimal visibility in varying light conditions.
8. Warranty and Support
For specific warranty information, return policies, or technical support regarding your SCIWIL SR-M818X Electric Bike Meter, please contact the seller or manufacturer directly. It is recommended to keep your purchase receipt and the product model number (SR-M818X) handy when contacting support to facilitate a quicker resolution.
