1. Introduction and Overview
This manual provides detailed instructions for the installation, operation, and troubleshooting of the SQUARE WAVE Intelligent Brushless Controller. Designed for electric scooters, tricycles, and other DIY electric vehicles, this 18MOSFET, 45A controller supports 48-72V and 1200W systems. It features dual-mode operation, compatible with hub motors (with or without Hall sensors) and square wave differential motors (with or without Hall sensors). It also includes a YXT speed wire for display compatibility.
Figure 1: The 48-72V 1200W Dual Mode Brushless Controller.
2. Specifications
| Feature | Detail |
|---|---|
| Type | Controller |
| Brand Name | phoebevpartstols |
| Origin | Mainland China |
| Application | Electric bike, scooter, tricycle, buggy DIY part |
| Power | 48-72V, 1200W, 45A |
| Size (L x W x H) | 16.8cm x 10.5cm x 5.8cm |
| Shell Material | Aluminum alloy |
| Model Type | Square wave controller |
| Display Signal Wire | YXT speed + phase wire speed wire |
| Package Weight | 1.0 kg |
| Package Dimensions | 20cm x 15cm x 10cm |
Figure 2: Controller dimensions for installation planning.
3. Setup and Installation
Before beginning installation, ensure the vehicle is safely supported with the motor suspended. Turn off the power lock and carefully verify the correct polarity of the power cord connections.
- Initial Connections: First, connect the main power line, motor phase lines, Hall sensor lines, and transfer lines. After these are securely connected, connect the learning lines in pairs.
- Motor Self-Learning (Debugging):
- Turn on the power lock. The motor should begin to rotate.
- If the motor rotates in reverse, unplug the learning wire and then re-insert it (or unscrew the throttle knob). The motor should now rotate forward.
- Once the motor rotates smoothly and its speed decreases, unplug the learning line.
- Turn the throttle knob to its maximum position. Allow the motor to idle for 5 seconds at its maximum speed to complete the debugging process.
- Function Connections: After the controller has completed its self-learning, connect all other vehicle functions, such as anti-theft, three-speed switch, reverse, power-off braking, and power assist. Note that if the motor's Hall sensor is damaged, the system will automatically switch to a Hall-free operating state.
Figure 3: Controller connections during installation.
4. Wiring Diagram
Refer to the diagram below for proper wiring connections. If your wire colors differ from those shown, please consult the seller for specific instructions.
Figure 4: Comprehensive wiring diagram for the controller. Key connections include: Motor Hall, Self Learning, Burglar Alarm (P+N), 3 Speed, Throttle, Reverse, Low Brake, High Brake, Power Lock, Phase Wire, YXT Display, Motor Phase Line, Positive, and Negative.
5. Operating Instructions and Features
The Intelligent Brushless Controller is designed with advanced features for reliable and efficient operation of your electric vehicle. Its intelligent frequency conversion six-mode capability ensures broad compatibility and energy efficiency.
Key Product Features:
- Original imported chip manufacturing for high performance.
- Brand new power tube, crafted with precision.
- Automatic compensation for single Hall sensor damage.
- Self-learning and Hall-free integration for versatile motor compatibility.
- Automatic recognition and matching of motor phase sequence.
- Main board treated with epoxy resin for waterproof protection.
- Main lines utilize national standard high-temperature resistant and flame-retardant wire.
- Universal compatibility for 60-degree and 120-degree motors.
- Intelligent frequency conversion energy-saving technology.
- Integrated LED fault indicator light for diagnostics.
- Intelligent anti-theft function and super three-speed modes.
- High-end aluminum alloy casing with oxidation treatment for durability and heat dissipation.
Figure 5: The controller's robust aluminum alloy casing for optimal heat dissipation.
6. Maintenance
The controller is designed for durability with its epoxy resin waterproof treatment and aluminum alloy casing. Regular maintenance should focus on ensuring all connections remain secure and free from corrosion. Keep the controller clean and free of excessive dust or debris. Avoid exposing the controller to extreme temperatures or direct impact. If the controller becomes wet, ensure it is thoroughly dried before re-applying power.
7. Troubleshooting
LED Fault Indicator Light Meanings:
| Flash Pattern | Fault Description |
|---|---|
| 1 second continuous flashing | Normal operation |
| Slow flashing twice | Brake failure |
| Slow flashing 3 times | Internal chip failure |
| Slow flashing 4 times | Lower bridge power transistor failure |
| Slow flashing 5 times | Bridge power transistor failure |
| Slow flashing 6 times | Motor Hall fault or connection error |
| Slow flashing 7 times | Overcurrent protection |
| Slow flashing 8 times | Battery undervoltage |
| Twice flash | Handle malfunction |
| Quick flash 3 times | Motor lockup protection |
| Flash 7 times | Learning successfully completed |
Figure 6: The controller's LED indicator provides diagnostic feedback.
Common Fault Causes and Troubleshooting Methods:
- Motor Does Not Rotate:
- Handle Failure: Check instrument display. If normal, pull out handle plug and measure 5V on black/red wire. If 5V is present, short the thin red wire (controller handle) and thin green wire (signal wire) with tweezers. If motor runs, controller speed is normal; replace handle.
- Brake Lever Failure: Unplug brake power outage plug. If motor operates normally, the brake lever is stuck or incorrectly connected. Recheck brake lever for damage or correct high/low potential brake connections.
- Motor Wire Not Properly Connected: If motor turns with noise or loud noise, it indicates phase loss. Check all three motor phase wires for firm connection.
- Power Supply Not Connected Properly: Measure voltage between electric door lock wire and ground. If no voltage, the main wiring harness electric door lock wire terminal is disconnected.
- Motor Rotates and Stops:
- Poor Power Cord Contact: Adjust contact position and polish contacts.
- Insufficient Battery Power: Use a multimeter to check voltage on the black/red power supply line.
- Assistance Does Not Work:
- Unplug controller power supply plug. Use tweezers to repeatedly short the power supply signal line (thin blue line) and thin yellow line several times. Troubleshoot after checking the sensor.
- Brake Power Off Switch Malfunction: Check if the brake returns to its original position.
- Motor Runs on Its Own:
- Damaged Rotating Handle: Unplug controller rotating handle plug. Short thin red wire and thin green signal wire with tweezers. If motor runs and stops when released, controller speed regulation is normal. Replace the speed regulating rotating handle.
- Motor Does Not Rotate After Rain:
- Controller Water Ingress: This indicates anti-flying protection. Remove sludge and moisture from the rotating plug.
- Unable to Enter Hall State:
- Motor Hall is Broken: Check and repair the motor Hall sensor.
- No Maximum Speed Operation: The controller enters Hall state only after the motor runs normally at maximum speed for 10 seconds. Turn the throttle knob to maximum and idle for 10 seconds.
- Slow Motor Speed:
- Speed control knob is damaged.
- Insufficient battery capacity or inability to charge.
- Motor failure.
- Controller malfunction.
- Brake Does Not Power Off:
- Brake lever malfunction; lever cannot return.
- Controller's high-level and low-level brakes are not properly connected. Refer to the wiring diagram for correct connection based on vehicle brake type.
- Motor Vibration:
- Poor contact between motor Hall connecting wire and controller. Reconnect.
- Poor contact of the handle wire.
- Speed signal line has interference.
- Poor contact of motor wires.
8. User Tips
No specific user tips were available from reviews or Q&A for this product. Always ensure all connections are tight and insulated to prevent short circuits and ensure safe operation.
9. Warranty and Support
For warranty information or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
10. Safety Information
⚠️ Disclaimer: Please be aware of potential fire risks and strictly follow all instructions in this manual for installation, operation, charging, and storage. Improper use can lead to serious injury or damage.
