1. Product Overview
The NULKOMMA GEN3 E-bike Controller and LCD Display Kit is designed to provide stable speed control and sensitive response for braking and direction changes in 48V electric bicycles, scooters, and mini bikes. This kit includes a brushless motor controller and a waterproof LCD display panel, offering clear data visualization and intuitive control.
Image 1.1: The NULKOMMA GEN3 E-bike Controller and LCD Display Kit, showing the brushless motor controller with its wiring harness and the separate LCD display unit.
2. Safety Information
- Always ensure the power is off before performing any installation, wiring, or maintenance.
- Verify that your e-bike's battery voltage is 48V to ensure compatibility with this controller.
- Consult a qualified technician if you are unsure about any installation steps. Improper installation can lead to damage or injury.
- Keep the controller and display away from extreme temperatures and direct sunlight for prolonged periods.
- Ensure all connections are secure and waterproof to prevent electrical shorts or damage from moisture.
3. Package Contents
The NULKOMMA GEN3 E-bike Controller Kit includes the following components:
- 1x Brushless Motor Controller
- 1x LCD Display Panel
- 1x LCD Screen Bracket
- Necessary wiring and connectors (integrated with controller and display)
4. Installation Guide
4.1. Controller Installation
- Mount the brushless motor controller in a secure, dry location on your e-bike, away from direct impact or excessive vibration. The aluminum alloy housing is designed for heat dissipation, so ensure adequate airflow around it.
- Identify the various wires extending from the controller. These include power, motor phase wires, hall sensor wires, throttle, brake levers, and the display connection.
Image 4.1: Detailed view of the NULKOMMA GEN3 E-bike Controller, showing its various wire connections and a label with technical specifications. This image helps identify the different connectors for installation.
4.2. LCD Display Installation
- Attach the LCD screen bracket to your e-bike's handlebars. This display is suitable for 22.2mm handlebars.
- Secure the LCD display panel onto the bracket.
- Connect the display's 6-pin male connector to the corresponding female connector from the controller's wiring harness. Ensure a firm connection.
Image 4.2: Dimensions of the NULKOMMA GEN3 LCD Display, indicating its size for proper handlebar mounting and fit.
4.3. Wiring Connections
Carefully connect the controller to your e-bike's components. Match the colors and types of connectors. The controller features a speed sensor line for accurate speed display.
- Motor Wires: Connect the three thick phase wires (usually green, blue, yellow) from the controller to the motor.
- Hall Sensor Wires: Connect the smaller hall sensor wires (usually five wires) from the controller to the motor.
- Battery Power: Connect the main power wires (red for positive, black for negative) from the controller to your 48V battery.
- Throttle: Connect the throttle connector.
- Brake Levers: Connect the brake lever connectors.
- Display: Connect the 6-pin male connector from the display to the controller.
Image 4.3: Comparison of 5-pin and 6-pin male connectors, highlighting that the NULKOMMA GEN3 controller uses a 6-pin male connector for the display, ensuring proper compatibility.
5. Operating Instructions
5.1. LCD Display Functions
The LCD display provides clear information about your e-bike's status and allows for quick operation through its buttons.
Image 5.1: The NULKOMMA GEN3 LCD Display with labels indicating the functions of its buttons and screen areas, including 'Display function switching', 'liquid crystal display', 'Gear up', 'Downshift', and 'Refers to broadcasting'.
- Power On/Off: Press and hold the 'M' button (Display function switching) to power the display and controller on or off.
- Gear Up/Down: Use the '+' and '-' buttons to adjust the assistance level or gear.
- Information Display: The liquid crystal display shows real-time data such as speed, battery level, assistance level, and trip distance.
- Backlight: The display features a backlight for clear visibility in dim environments.
5.2. Riding with the Controller Kit
- After powering on, select your desired assistance level using the '+' or '-' buttons.
- Begin pedaling or use the throttle (if installed) to engage the motor.
- The controller provides sensitive control for smooth acceleration and braking.
- Monitor your speed and battery level on the LCD display during your ride.
6. Maintenance
- Cleaning: Wipe the display and controller with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials. Ensure no water enters the connectors.
- Connection Check: Periodically inspect all wiring connections to ensure they are secure and free from corrosion or damage.
- Heat Dissipation: Ensure the controller's aluminum housing remains clear of obstructions to allow for proper heat dissipation.
- Storage: When not in use for extended periods, store your e-bike in a dry, temperate environment.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display does not power on. | Loose connection, low battery, faulty display/controller. | Check all wiring connections, especially the main power and display cable. Ensure the battery is charged. |
| Motor not responding. | Loose motor wires, hall sensor issue, faulty throttle/PAS, controller error. | Verify motor phase and hall sensor connections. Check throttle/PAS functionality. Power cycle the system. |
| Inaccurate speed reading. | Speed sensor line issue. | Ensure the speed sensor line is properly connected and undamaged. |
| System powers off unexpectedly. | Low battery voltage, overheating controller, loose power connection. | Charge the battery. Ensure controller has adequate ventilation. Check battery connections. |
8. Specifications
Key technical specifications for the NULKOMMA GEN3 E-bike Controller Kit:
| Feature | Detail |
|---|---|
| Model Name | GEN3 |
| Rated Voltage | 48V |
| Maximum Current | 22A |
| Rated Current | 11A |
| Low Voltage Protection | 39V |
| Throttle Adjustment Voltage | 1.2V-4.4V |
| Controller Material | Aluminum Alloy |
| Display Material | ABS Plastic + LCD |
| Handlebar Compatibility | 22.2mm |
| Display Connector Type | 6-pin Male |
| Waterproof Feature | Yes (Controller adaptors waterproof design) |
| Compatible Motor Wattage | 750W/1000W |
9. Warranty & Support
9.1. Quality Assurance
NULKOMMA is committed to providing high-quality products. This e-bike motor controller is manufactured with premium materials and undergoes quality checks to ensure reliable performance.
9.2. Customer Support
Should you have any questions regarding your purchase, installation, or operation of the NULKOMMA GEN3 E-bike Controller Kit, please contact our customer support. We aim to resolve any issues within 24 hours.
