Mcezdy P3C UART2 Waterproof Electric Bike LCD Display Meter

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your Mcezdy P3C UART2 Waterproof Electric Bike LCD Display Meter. Designed for electric bikes and scooters, this display offers essential ride information and features a robust, waterproof design. Please read this manual carefully before use to ensure proper function and longevity of your device.

2. Key Features

• Display Type: Left-mounted VA color LCD display.
• User Interface: Three separate buttons for easy operation.
• Waterproof Rating: IP65 Grade, ensuring durability in various weather conditions.
• Connectivity: UART2 communication protocol.
• Charging: Integrated USB charging port (5V/500mA) for external devices.
• Functions: Battery Indicators, Headlight control, Walk mode, PAS (Pedal Assist System) level, Current Speed, Trip Distance (TRIP), Odometer (ODO), Running Time, Unit selection (Mile/KM), Error Warning.
• Advanced Functions: Boost function, Cruise control function, One-click recovery function.

3. Specifications

4. Compatibility

This display meter is designed to work exclusively with controllers using the UART2 communication protocol. It is crucial to verify that your e-bike or e-scooter controller supports UART2 to ensure proper functionality. Compatibility depends on the controller's protocol, not just the motor brand or model.

Important: If your controller does not use the UART2 protocol, this display will not function correctly.

5. Installation Guide

Follow these steps for wired installation of your LCD display meter:

1. Break off the extension seat buckle from the display and insert it onto your handlebar from a low position.
2. Adjust the display to your desired viewing angle and tighten the screws to secure it.
3. Align the meter head in place and clamp it firmly.
4. Tighten the gauge head clockwise until it is firmly secured.
5. Route and wrap the display's wire neatly down along the brake line.
6. Install the speed transmitter and magnet on the front fork of your bike, ensuring proper alignment for speed detection.
7. Connect the power cable from the display to your e-bike's controller. Ensure the connectors are fully seated and secure.

6. Operating Instructions

The display features three buttons: '+', Power, and '-'.

• Power On/Off: Press and hold the Power button to turn the display on or off.
• Adjust PAS Level (Up-shifting): Press the '+' key to increase the pedal assist level.
• Adjust PAS Level (Down-shifting): Press the '-' key to decrease the pedal assist level.
• Page Switching: Short press the Power button to cycle through different display pages, showing ODO (Total Mileage), DST (Single Mileage), TIME (Boot Time), WATT, CUR (Current), and VOL (Voltage).
• Headlight Control: Long press the '+' key to turn the headlight on or off.
• USB Charging: The integrated USB port allows you to charge other electronic products during use.

6.1. Speed Adjustment (P08 Setting)

To adjust the speed limit (if your controller allows):

1. Long press both the '+' and '-' keys simultaneously to enter the settings menu.
2. Short press the Power button to navigate to the P08 setting.
3. Use the '+' key to set your desired speed limit.
4. After adjusting, long press both the '+' and '-' keys again to save the setting and exit the menu.

7. Wiring Diagrams

The display is available with different connector types (5PIN and 6PIN). Please ensure you use the correct wiring for your controller.

7.1. 5PIN Connector Wiring

• Red (D+)
• Black (GND)
• Yellow (TX)
• Green (RX)
• Blue (K)

7.2. 6PIN Connector Wiring

• Red (D+)
• White (Light)
• Black (GND)
• Yellow (TX)
• Green (RX)
• Blue (K)

8. Troubleshooting

8.1. E10 Error Displayed

If the instrument interface displays an E10 error after connection, it typically indicates one of the following issues:

• Communication Protocol Mismatch: The communication protocol used by the display (UART2) does not match the protocol of your controller. Ensure both devices use the UART2 protocol.
• Controller or Component Malfunction: The overall condition of your e-bike's electrical system is poor. A malfunction or short circuit in components such as the booster, rotary knob, or motor can prevent the controller from operating correctly, leading to a communication failure between the display and the controller.

9. User Tips

• Speed Limit: The default speed setting for this product is unlimited (100). If your e-bike's controller has its own speed limit, the display will only show the speed as limited by the controller.
• Voltage Compatibility: This display supports a wide voltage range of 24V/36V/48V/60V. (Note: The S810 model specifically supports only 36V).
• Protocol Verification: Always confirm your controller's communication protocol before purchasing or installing. If you are unsure, consult your controller's manual or contact its seller.

10. Maintenance

• Cleaning: Use a soft, damp cloth to clean the display screen. Avoid using abrasive cleaners or solvents that could damage the screen or casing.
• Inspection: Regularly check all connections for tightness and signs of wear or damage. Ensure the display is securely mounted.
• Water Exposure: While the display is IP65 waterproof, avoid prolonged submersion or high-pressure water jets directly on the screen.
• Storage: When not in use for extended periods, store the e-bike in a dry, cool place away from direct sunlight.

11. Warranty and Support

For any issues or questions regarding your Mcezdy P3C LCD Display Meter, please contact the seller or manufacturer's support channel. Keep your purchase receipt as proof of purchase for warranty claims.

Please note that returns or exchanges are generally not accepted for non-quality issues, especially if the product is incompatible due to an incorrect protocol match with your controller.