Introduction
The ChongXiao Brushless Square Wave Controller with LCD Display is an electronic device designed for electric scooters and electric bicycles. It provides control over speed and direction, and its integrated display instrument allows users to monitor the operating status of their vehicle. This brushless design ensures smoother operation, enhanced stability, and a longer lifespan. The controller incorporates advanced technology for reliable performance and durability, contributing to the safety and stability of your electric vehicle.
What's in the Box
- Brushless Controller
- LCD Display (Thumb Display)
Specifications
| Brand | ChongXiao |
| Model Name | 1000W 1200W 1500W brushless controller with thumb display |
| Nominal Voltage Range | 36V, 48V, 60V |
| Maximum Power Output | 1000W, 1200W, 1500W |
| Maximum Current | 34A, 36A, 40A |
| Item Type | Brushless Controller |
| Recommended Uses | Repair/Replacement, Upgrade |
| Brake Style | Thumb Brake and Regenerative |
| Material | Aluminum (Frame) |
Setup Instructions
Careful installation is crucial for the proper function and safety of your electric bike or scooter. Ensure the vehicle is powered off before beginning any installation steps.
Controller Overview

Image: The red casing of the ChongXiao Brushless Square Wave Controller.
The controller features a robust red aluminum casing designed for heat dissipation and protection. Ensure it is mounted in a location that allows for adequate airflow and is protected from direct water exposure.
Dimensions

Image: Diagram showing the dimensions of the controller: 212mm length, 88mm width, 48mm height.
Before installation, verify that the controller's dimensions (approximately 212mm x 88mm x 48mm) fit within the available space on your electric bike or scooter.
Wiring Connections

Image: Detailed wiring diagram for the controller, labeling each connector.
Refer to the wiring diagram above for correct connections. Each numbered connection corresponds to a specific function:
- High-level Brake: Connect to the high-level brake signal.
- Brake Light Power: Connect to the brake light power supply.
- Throttle Handle: Connect to the throttle input.
- Reverse Gear: Connect for reverse function (if applicable).
- Low Brake: Connect to the low-level brake signal.
- Hall (5 wires): Connect to the motor's Hall sensor wires.
- Linear Brake (Thumb Brake): Connect to the thumb brake lever.
- PAS (Pedal Assist System): Connect to the PAS sensor.
- Head Light/Tail Light Power: Connect for vehicle lighting.
- Regenerative Brake: Connect for regenerative braking function.
- Intelligent Recognition (Self-learning): Used for initial motor pairing.
- LCD: Connect to the LCD display unit.
- Ignite: Connect to the ignition switch.
- XT60 Battery: Connect to the main battery power supply (XT60 connector).
- Phase Line: Connect to the motor's phase wires.
Thumb Display Installation

Image: The thumb display unit with its mounting bracket and cable.
Mount the thumb display securely on your handlebar using the provided bracket. Ensure it is within easy reach for operation and visibility. Connect the display cable to the 'LCD' port on the controller.
Self-Learning Function
After all connections are made, use the 'Intelligent Recognition' (self-learning) wires to pair the controller with your motor. Typically, you connect these two wires, power on the system, and the motor will spin. If it spins in the wrong direction, disconnect, reconnect, and power on again. Once the motor spins correctly, disconnect the self-learning wires. This process helps the controller learn the motor's phase and Hall sensor configuration.
Operating Instructions
Once installed and powered on, the LCD display will show key operating parameters.
Power On/Off
Press and hold the power button on the LCD display to turn the system on or off. Ensure all connections are secure before powering on.
Display Functions
The LCD display typically shows:
- Current Speed
- Battery Level Indicator
- Assistance Level (PAS)
- Trip Distance / Odometer
- Error Codes (if any)
Use the buttons on the display to cycle through different information screens or adjust settings like assistance level.
Throttle and Braking
The thumb throttle controls motor power. Apply the throttle gradually for smooth acceleration. The brake levers (including regenerative brake if connected) will cut motor power and activate braking functions.
Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your controller and display.
- Keep Clean: Wipe the controller and display with a dry or slightly damp cloth. Avoid using harsh chemicals or excessive water.
- Check Connections: Periodically inspect all wiring connections to ensure they are secure and free from corrosion or damage. Loose connections can lead to intermittent operation or system failure.
- Avoid Water Exposure: While the controller may have some water resistance, it is not fully waterproof. Avoid submerging the unit or exposing it to heavy rain for extended periods.
- Temperature: Operate and store the unit within recommended temperature ranges to prevent damage to electronic components.
Troubleshooting
If you encounter issues, refer to the following common troubleshooting steps:
- No Power to Display/Controller:
- Check battery connection (XT60).
- Ensure the ignition wire (if used) is properly connected and switched on.
- Verify the main power cable from the battery to the controller is intact.
- Motor Not Responding:
- Check motor phase wires and Hall sensor wires for secure connection.
- Ensure the throttle handle is connected correctly.
- Perform the self-learning function again if the motor was recently installed or reconnected.
- Check for any error codes on the LCD display.
- Incorrect Speed/Power Output:
- Verify the battery voltage matches the controller's supported range (36V/48V/60V).
- Ensure the display settings (e.g., wheel size, speed limit) are correctly configured.
- Display Not Working Correctly:
- Check the connection between the LCD display and the controller.
- Ensure the display itself is not damaged.
If these steps do not resolve the issue, contact customer support.
Warranty Information
This product comes with a Limited Warranty. Specific details regarding the terms and conditions of this warranty are not provided in the product information. Please retain your proof of purchase for any warranty claims.
Customer Support
For further assistance, technical support, or warranty inquiries, please contact the seller or manufacturer directly through the platform where the product was purchased. Provide your product model number and purchase details when contacting support.