DYU D3+ E-Bike Controller Instruction Manual

1. Product Overview

This manual provides essential information for the installation, operation, and maintenance of your Original DYU D3+ Controller for DYU E-BIKE. This controller is designed for DC brushless motors and is a crucial component for the proper functioning of your electric bicycle.

2. Specifications

The DYU D3+ Controller (Model: DQHB2.6) features the following technical specifications:

3. Installation and Setup

Before attempting installation, ensure your e-bike's power is completely off and the battery is disconnected. Improper installation can lead to damage to the controller or other e-bike components.

3.1 Component Identification

The controller features multiple colored wiring harnesses. Each harness is designed for a specific connection on your DYU E-Bike. Refer to your e-bike's original wiring diagram for precise connection points. Common connections include:

• Motor phase wires (usually thicker, often green, blue, yellow)
• Hall sensor wires (smaller, often grouped with motor wires)
• Battery power input (red/black, thicker)
• Throttle input
• Brake lever sensors (low-level input)
• Display/meter connection
• Headlight/taillight output (check for specific outputs if available)

3.2 Installation Steps

1. Disconnect Power: Ensure the e-bike battery is disconnected before starting.
2. Remove Old Controller: Carefully disconnect all wires from the old controller and remove it from its mounting location. Note the position of each wire.
3. Mount New Controller: Securely mount the new DYU D3+ controller in the designated location on your e-bike. Ensure it is protected from moisture and physical damage.
4. Connect Wires: Connect the wiring harnesses from the new controller to the corresponding components on your e-bike. Match colors and connector types. Pay close attention to the motor phase wires and Hall sensor wires, as incorrect connection can damage the motor or controller.
5. Double-Check Connections: Before reconnecting the battery, thoroughly check all connections to ensure they are secure and correctly matched.
6. Reconnect Battery: Reconnect the e-bike battery.
7. Test Functionality: Turn on the e-bike and test all functions (throttle, brakes, lights, display) at a low speed in a safe environment.

4. Operating Instructions

The DYU D3+ controller manages the power delivery to your e-bike's motor based on your input from the throttle and other sensors. Once installed correctly, its operation is integrated with your e-bike's existing controls.

• Power On/Off: Use your e-bike's main power switch to turn the system on or off.
• Throttle Control: The controller interprets the throttle input (Speed Set: 1-4.2V) to regulate motor speed.
• Brake Function: The controller features a low-level brake input. When the brake levers are engaged, the motor power will be cut off.
• Display/Meter: If your e-bike has a display, the controller communicates with it to show speed, battery level, and other relevant information.

5. Maintenance

To ensure the longevity and optimal performance of your DYU D3+ controller:

• Keep Clean: Regularly clean the exterior of the controller to prevent dust and debris buildup, especially around the heat sink fins.
• Avoid Moisture: Protect the controller from water and excessive moisture. While designed for outdoor use, direct exposure to heavy rain or submersion can cause damage.
• Check Connections: Periodically inspect all wiring connections for looseness or corrosion. Secure any loose connections.
• Physical Inspection: Check for any signs of physical damage to the controller casing or wires.

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6. Troubleshooting

If you encounter issues with your DYU D3+ controller, consider the following common problems and solutions:

• No Power to Motor:
  • Check battery connection and charge level.
  • Verify all motor phase wires and Hall sensor wires are securely connected.
  • Ensure brake levers are not engaged, as this cuts motor power.
• Erratic Motor Behavior:
  • Inspect Hall sensor connections for damage or looseness.
  • Check for any loose or corroded connections in the throttle wiring.
• Controller Overheating:
  • Ensure the controller is mounted in a location with adequate airflow.
  • Avoid prolonged high-power usage, especially on inclines, if the motor is struggling.
• No Display Function:
  • Check the display unit's wiring connection to the controller.
  • Verify the display unit itself is functioning correctly.

User Tips:

• When replacing the controller, it is highly recommended to take photos of the original wiring setup before disconnecting anything. This serves as a valuable reference.
• If you are unsure about specific wiring connections, especially for accessories like stop lights or rear gauges, consult a professional e-bike technician or refer to detailed wiring diagrams specific to your DYU E-Bike model. The controller provides various outputs, but their specific functions and voltage levels should be confirmed to avoid damage.

7. Warranty and Support

For warranty claims or technical support, please contact the seller or manufacturer directly. Keep your purchase receipt and any product identification numbers handy. The manufacturer is Shenzhen Counterbalance Technology Co., Ltd.