NULKOMMA E-Bike Brushless Motor Controller and KD26E Display Kit User Manual

1. Introduction

Welcome to the user manual for your NULKOMMA E-Bike Brushless Motor Controller and KD26E Display Kit. This manual provides essential information for the proper installation, operation, and maintenance of your new e-bike component kit. Please read these instructions carefully before use to ensure optimal performance and safety.

Important Note: This is a customized model. To ensure compatibility with your specific e-bike, NULKOMMA may contact you after your order. Please monitor your messages and respond promptly to facilitate a smooth setup process.

2. Product Overview

2.1 Components Included

• 1x Brushless Motor Controller
• 1x KD26E LED Display Panel

2.2 Key Features

• Stable Speed Control: The brushless motor controller provides stable speed and sensitive control for braking and direction changes.
• Durable Construction: The controller housing is made of aluminum alloy with a grooved design for efficient heat dissipation, preventing thermal overloading. The display is constructed from durable ABS material, offering good toughness and waterproof properties.
• Voltage Compatibility: Designed for 36V and 48V e-bike systems, suitable for 500W brushless motors.
• Integrated Speed Sensor: Includes a speed sensor line for accurate speed display.
• Waterproof Design: Controller adaptors feature a waterproof design for enhanced durability in various weather conditions.
• Clear Display: The KD26E LED display clearly shows operational status and data, with a backlight for visibility in low-light environments.

2.3 Product Visuals

3. Setup and Installation

3.1 Before Installation

• Ensure your e-bike battery voltage is either 36V or 48V to match the controller's specifications.
• Confirm your handlebars have a diameter of 22.2mm for proper display mounting.
• Disconnect the e-bike battery before beginning any installation to prevent electrical hazards.

3.2 Controller Installation

1. Mount the brushless motor controller securely in a protected area on your e-bike, away from direct impact or excessive moisture. The aluminum housing is designed for heat dissipation, so ensure adequate airflow.
2. Connect the various wires from your e-bike's motor, battery, and other components to the corresponding connectors on the controller. Refer to Figure 2 for a visual guide to the connector types (e.g., 1-pin, 2-pin, 3-pin, 4-pin, 5-pin male/female). Ensure all connections are firm and correctly oriented.
3. The controller features a waterproof design for its adaptors; however, it is good practice to ensure all connections are snug and protected from direct water exposure.

3.3 Display Installation

1. Attach the KD26E LED display to your e-bike's handlebars using the provided bracket. Ensure it is positioned for easy viewing and access to the buttons. The display is compatible with 22.2mm handlebars.
2. Connect the display's cable (5-pin female connector) to the corresponding port on the brushless motor controller. Ensure the connection is secure.

4. Operating Instructions

4.1 Powering On/Off

• To power on the system, press and hold the power button (center button) on the KD26E display until the screen illuminates.
• To power off, press and hold the power button again until the display turns off.

4.2 Display Functions (KD26E)

The KD26E display provides real-time information about your e-bike's status:

• Battery Level: Indicates the remaining battery charge.
• Speed Display: Shows your current riding speed.
• Mode Selection: Displays the current power assist level (Low, Mid, High).
• Backlight: The display features a backlight for clear visibility in dim environments.

4.3 Mode Selection

Use the '+' and '-' buttons on the KD26E display to cycle through the power assist modes:

• Low: Provides minimal motor assistance, ideal for conserving battery or light riding.
• Mid: Offers moderate motor assistance for balanced power and range.
• High: Delivers maximum motor assistance for challenging terrain or higher speeds.

5. Maintenance

5.1 General Care

• Regularly inspect all electrical connections for tightness and signs of wear. Loose connections can lead to intermittent operation or damage.
• Keep the controller and display free from excessive dirt, dust, and moisture.
• Avoid exposing the components to extreme temperatures for prolonged periods.

5.2 Cleaning

• Wipe the controller and display surfaces with a soft, damp cloth.
• Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the materials and electronic components.
• Ensure the display and controller are completely dry before operating the e-bike.

6. Troubleshooting

6.1 Common Issues

• No Power to Display/Motor:
  • Check if the e-bike battery is charged and properly connected.
  • Verify all connections between the battery, controller, and display are secure.
  • Ensure the power button on the display is pressed correctly.
• Inaccurate Speed Reading:
  • Check the connection of the speed sensor line to the controller.
  • Ensure the speed sensor itself is correctly installed and functioning.
• Motor Not Responding:
  • Verify all motor phase wires and Hall sensor wires are correctly connected to the controller.
  • Check for any error codes displayed on the KD26E (if applicable, refer to specific display manual for codes).

6.2 Contact Support

If you encounter issues that cannot be resolved using the troubleshooting steps above, please refer to the Warranty and Support section for contact information. Do not attempt to repair complex electrical components yourself, as this may void your warranty and pose a safety risk.

7. Specifications

8. Warranty and Support

8.1 Warranty Information

This NULKOMMA product is covered by a 1-year warranty from the date of purchase. The warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.

8.2 Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please contact NULKOMMA customer support. As this is a customized model, direct communication with NULKOMMA is recommended for specific compatibility questions or issues related to your e-bike setup.

You can typically find contact information through the retailer where you purchased the product or by visiting the official NULKOMMA store page: NULKOMMA Amazon Store.