Electric Bicycle LCD Speed Display GZ3 with Thumb Throttle User Manual

1. Product Overview

The FOCAN GZ3 LCD Speed Display with integrated thumb throttle is designed for electric bicycles and e-scooters, providing essential ride data and control. It features a durable, lightweight, and waterproof design for reliable performance.

Key Features:

• Wide Compatibility: Designed for 22.2mm (0.9in) handlebars.
• Durable Construction: Made from high-quality ABS material, ensuring lightweight, waterproof, and long-lasting use.
• User-Friendly Operation: Easy to install and disassemble, with intuitive controls.
• Clear Display: Large LCD screen for easy viewing of data, even in varying light conditions.
• Backlight Function: Ensures visibility of the screen in dark environments.

2. Specifications

3. Setup and Installation

Before installation, ensure your electric bicycle controller supports the UART NO.2 communication protocol. Incompatible protocols will result in an E10 (Communications Receiving Failure) error.

3.1 Component Identification

• GZ3 LCD Display with integrated thumb throttle.
• Controller (sold separately, must be compatible).
• Connecting cables (SM 5pin or Waterproof 5Pin Male).

Figure 3.1: GZ3 LCD Display with SM 5PIN Connector

Figure 3.2: GZ3 LCD Display with Waterproof 5PIN Male Connector

3.2 Wiring Diagram for FOCAN Controller

Refer to the diagram below for connecting the GZ3 display to a FOCAN controller. Ensure all connections are secure and match the specified functions.

Figure 3.3: FOCAN Controller Wiring Diagram (24V 36V 48V)

3.3 Connector Pinout Details

The GZ3 display uses either an SM 5PIN terminal interface or a Waterproof 5PIN Male connector. The pin assignments are critical for correct operation.

Figure 3.4: SM 5PIN Terminal Interface Wiring Diagram

Figure 3.5: Waterproof 5PIN Male Connector Wiring Diagram

3.4 Mounting the Display

1. Attach the LCD screen display bracket to your 22.2mm (0.9in) handlebar.
2. Secure the GZ3 display onto the bracket.
3. Connect the display cable to the corresponding port on your e-bike controller, ensuring the correct plug type (SM 5pin or Waterproof 5Pin Male) is used.
4. If applicable, connect the SM 2pin light cable.

4. Operating Instructions

The GZ3 display provides real-time information and allows for basic parameter adjustments.

4.1 Display Functions

• Speed Display: Shows current riding speed.
• Battery Level Display: Indicates remaining battery charge.
• Error Indication: Displays error codes if issues arise.
• Total Mileage (ODO): Tracks the total distance traveled.
• Single Mileage: Tracks the distance for the current trip.

4.2 Button Functions

The display typically features buttons for power, mode selection, and parameter adjustment.

• Power Button: Turns the display ON/OFF.
• Mode Button (M): Cycles through display modes or enters settings.
• Up/Down Arrows: Adjust values or navigate menus.

4.3 Adjusting Voltage (P03 Setting)

The GZ3 display supports multiple voltage systems (24V, 36V, 48V, 52V, 60V). The correct voltage must be set via the P03 parameter on the screen to match your e-bike's battery.

1. Turn on the display.
2. Press and hold the Mode (M) button to enter the settings menu.
3. Navigate to the P03 setting using the Up/Down arrow buttons.
4. Adjust the P03 value to match your battery's voltage (e.g., 36 for 36V, 48 for 48V).
5. Save the setting by pressing the Mode (M) button again or following the on-screen prompts.

4.4 Demonstration Video

Watch this video for a visual guide on connecting the display and demonstrating its functions, including P-setting adjustments.

5. Maintenance

• Cleaning: Wipe the display screen with a soft, damp cloth. Avoid abrasive cleaners or solvents.
• Water Exposure: While waterproof, avoid prolonged submersion. Ensure connectors are dry before connecting.
• Cable Inspection: Periodically check all cables and connectors for wear, damage, or loose connections.
• Storage: If storing the e-bike for an extended period, ensure the display is clean and stored in a dry place.

6. Troubleshooting

Common Issues and Solutions:

• Error Code E10 (Communications Receiving Failure): This indicates an incompatibility with your controller's communication protocol. The GZ3 display requires a controller that uses the UART NO.2 protocol. Verify your controller's protocol.
• Display Not Turning On: Check power connections to the controller and ensure the battery is charged. Verify the display cable is securely connected.
• Incorrect Speed/Battery Reading: Ensure the P03 voltage setting matches your battery. For speed, check wheel circumference settings if available (though not explicitly mentioned for GZ3, it's a common e-bike display setting).
• No Throttle Response: Check the throttle connection to the controller. Ensure the throttle is properly calibrated or recognized by the controller.

7. User Tips

• Verify Controller Compatibility: Always double-check that your e-bike controller uses the UART NO.2 communication protocol before purchasing or installing this display to avoid compatibility issues and the E10 error.
• Throttle Integration: If your controller has a separate 3-pin connector for the throttle, ensure the GZ3's integrated thumb throttle is compatible or that you have the correct wiring adapter if needed.
• Voltage Setting: Correctly set the P03 parameter on the display to match your e-bike's battery voltage (24V, 36V, 48V, 52V, or 60V) for accurate readings and proper operation.

8. Warranty and Support

For any technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase records for reference.