UART2 M5C-2 Electric Bicycle Cycling Computer LCD Display User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your Mcezdy UART2 M5C-2 Electric Bicycle Cycling Computer LCD Display. Please read this manual thoroughly before use to ensure proper function and safety.

2. Compatibility

Important: This display is only compatible with controllers using the UART No.2 protocol. It is not compatible with other UART protocols (e.g., Bafang, KDS) or CAN protocols.

To determine if your e-bike is compatible:

• Consult the user manual or technical documentation provided by your e-bike or controller manufacturer.
• Check your e-bike's existing display to see which communication protocol it uses.
• Contact the manufacturer of your e-bike or controller for details about the communication protocols.

3. Setup and Installation

Follow these steps for wired installation of the M5C-2 display:

1. Step 1: Break off the extension seat buckle and insert it from a low position.
2. Step 2: Adjust the angle and tighten the screws to secure the display mount.
3. Step 3: Align the position and clamp the meter head in place.
4. Step 4: Tighten the gauge head clockwise and tighten firmly to the end.
5. Step 5: Wrap the wire down the brake line, ensuring it is neatly routed and secured.
6. Step 6: Install the transmitter and magnet on the front fork, ensuring proper alignment for speed detection.

Wiring Diagram:

4. Operating Instructions

The M5C-2 display provides a clear interface with various indicators:

4.1 Bluetooth Connection

The M5C-2 display supports Bluetooth connectivity for enhanced features via a mobile application:

1. Download the companion APP (e.g., "Ai qixing" or similar) on your mobile phone.
2. Log in to the application.
3. Connect the display to your phone via Bluetooth.
4. Access function settings within the app, which may include:
   • Find a vehicle
   • Mileage tracking
   • Vehicle Locking/Unlocking
   • Other settings based on the APP's features.

4.2 Changing Speed Settings

To adjust the speed setting on your display:

1. Long press the '+' and '-' keys simultaneously to enter the menu.
2. Short press the power button to navigate to parameter P08.
3. Once in P08, use the '+' key to set your desired speed value.
4. After adjusting, long press the '+' and '-' keys again to save the changes and exit the menu.

Note: The default speed setting is unlimited (100). If your e-bike's controller has a speed limit, the display will only show the speed up to that limit, regardless of the display's setting.

5. Maintenance

The M5C-2 display is designed for durability and features an IP67 waterproof rating, making it resistant to dust and water immersion up to 1 meter for 30 minutes. However, proper care is still recommended.

General Care:

• Clean the display regularly with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the screen or casing.
• Ensure all connections are secure and free from corrosion.
• Avoid exposing the display to extreme temperatures or direct sunlight for prolonged periods.

6. Troubleshooting

6.1 Displaying E10 Error

If the instrument interface displays an "E10" error, it typically indicates a communication issue. Possible causes include:

• Communication Protocol Mismatch: The communication protocol used by the display and your e-bike's controller do not match. This display requires the UART No.2 protocol.
• Faulty Components: One or more components (e.g., booster, rotary knob, motor) in your e-bike system may be malfunctioning or have a short circuit. This can prevent the controller from operating correctly and disrupt communication with the display.

Resolution:

• Verify the communication protocol of your controller. If it's not UART No.2, the display is incompatible.
• Inspect the wiring and connections for any loose or damaged parts.
• If the issue persists, consult a qualified e-bike technician to diagnose potential faults in other e-bike components.

6.2 Speed Limit Issues

If you experience unexpected speed limitations:

• The default speed setting on the M5C-2 display is unlimited (100).
• If your e-bike's controller has a built-in speed limit, the display can only show and operate up to that limit, regardless of the display's settings.
• Some specialized versions of the display may support an immediate 25 km/h speed limit, but the regular version does not.

Resolution:

• Check your controller's specifications for any inherent speed limits.
• Adjust the speed setting on the display as described in Section 4.2. If the controller limits the speed, changing the display setting will not override it.

7. Specifications

8. User Tips

• Always verify your e-bike's controller communication protocol (UART No.2) before purchasing or installing this display to avoid compatibility issues.
• Be aware that the display's speed settings cannot override a speed limit imposed by your e-bike's controller.
• For optimal performance and to prevent errors, ensure all wiring connections are secure and correctly matched according to the provided diagrams.
• If you are unsure about any installation or troubleshooting steps, it is recommended to seek assistance from a professional e-bike technician.

9. Warranty and Support

For any technical assistance, troubleshooting beyond this manual, or inquiries regarding warranty, please contact the seller or manufacturer directly. Provide your product model (M5C-2) and a detailed description of the issue for efficient support.