1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Heltecbms 2000W Brushless DC Controller. Designed for electric two-wheelers and three-wheelers, this controller offers robust performance, high efficiency, and a range of essential functions to enhance your vehicle's capabilities. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Product Overview
The Heltecbms Brushless DC Controller is a high-performance component designed for electric vehicles requiring reliable power management. It supports multiple voltage values and features a durable, moisture-proof casing.




3. Setup and Installation
3.1. Package Contents
Verify that all components are present in the package:

3.2. Product Dimensions
The dimensions for the 2000W model are as follows (Error range: ±1mm):

3.3. Controller Wiring Harness Description
Understanding the wiring harness is crucial for correct installation. Refer to the diagram below for a quick guide to each line's function. Beginners can also install by following these descriptions.

Wiring Key:
- Hall line: For motor Hall sensor signals.
- Study wire: For motor learning/self-learning function.
- Alarm Power supply: Provides power for the alarm system.
- Burglar alarm: Connects to the anti-theft alarm.
- Turn handle: Connects to the throttle/accelerator.
- One-click access: For quick start or specific function activation.
- Yadea Instrument: Connects to Yadea brand instruments/displays.
- Astern: For reverse gear function.
- Low brake: Connects to low-level brake signal.
- High brake: Connects to high-level brake signal.
- Soft and hard start: Adjusts motor start characteristics.
- Positive electrode wire: Main positive power connection.
- Three speed cycle: For cycling through different speed modes.
- Three speed: For selecting specific speed modes.
3.4. Simple Connection
If the plugs are not universal for your vehicle, you can change the wires. Select and connect according to the functional wire ends as described above. The connection method for 2000W, 2500W, and 3000W models is consistent.

4. Operating Instructions
Once installed, the controller enables various functions for your electric vehicle:
- Anti-theft: Integrated support for anti-theft systems.
- Three-speed: Allows selection between three distinct speed modes.
- Reversing: Provides a reverse gear function for maneuverability.
- Repair: May include a self-repair or diagnostic mode.
- One-line pass: A simplified wiring option for certain functions.
The controller operates within a working voltage range of 48V, 60V, or 72V, with a maximum working current of 40A. It utilizes a 120° Hall Sensing Phase for efficient motor control.
5. Maintenance
To ensure the longevity and optimal performance of your Heltecbms Brushless DC Controller, follow these maintenance guidelines:
- Keep Clean: Regularly clean the exterior of the controller to prevent dust and dirt buildup, which can affect heat dissipation.
- Moisture Protection: Although the casing is waterproof and moisture-proof, avoid prolonged exposure to extreme wet conditions. Ensure all connections are secure to prevent water ingress.
- Inspect Wiring: Periodically check all wiring connections for signs of wear, corrosion, or looseness. Secure any loose connections.
- Avoid Physical Damage: Protect the controller from impacts or physical damage. The high-strength aluminum casing is durable but not indestructible.

6. Troubleshooting
If you encounter issues with your controller, consider the following basic troubleshooting steps:
- No Power: Check all power connections, including the main positive electrode wire and battery connections. Ensure the battery is charged and providing the correct voltage (48V/60V/72V).
- Motor Not Responding: Verify that the Hall line and other signal wires are correctly connected and not damaged. Check the throttle (turn handle) connection.
- Incorrect Speed/Function: Ensure the three-speed and other function lines are properly connected according to your vehicle's setup.
- Unusual Noise: While the controller is designed for low noise operation, excessive or unusual noise might indicate a loose connection or a motor issue.
For complex issues or if troubleshooting steps do not resolve the problem, it is recommended to consult a qualified technician or contact customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Product Model | HT-BLDC2000W72V-CA |
| Controller Type | Brushless DC Controller |
| Model | Wireless Controller |
| Working Voltage | 48V/60V/72V |
| Max Working Current | 40A |
| Power | 2000W |
| Hall Sensing Phase | 120° |
| Matching Wiring Harness | Hall line/Information line/Learning line |
| Size (L*W*H) | 180mm * 98mm * 40mm |
| Accessory Type | Battery Accessories |
| Certification | CE |
| Voltage Range | Low voltage non-USB (below 75V DC, below 50V AC) |
| Output Power | >500W |
| Electronic | No |
| Charger Included | No |
| Battery Included | No |
| High-concerned chemical | None |
8. User Tips
Based on user feedback, here are some tips for getting the most out of your controller:
- Quiet Operation: The controller is designed for low noise. If you experience unusual sounds, double-check your motor and controller mounting to ensure they are secure and free from vibrations.
- Wiring Clarity: Take your time with the wiring. Although the diagram is clear, proper identification and secure connections are key to avoiding issues. Labeling wires before connecting can be helpful.
- Power and Climbing: Users report strong power and good climbing ability, especially with the 2000W model. Ensure your battery system is adequate for the controller's power output to maximize performance.

9. Warranty and Support
The Heltecbms Brushless DC Controller is manufactured to high-quality standards and is CE certified. For any technical assistance, warranty claims, or support inquiries, please contact the seller or manufacturer directly. Keep your purchase records for warranty purposes.





