1. Introduction
The Oumefar Brushless Motor Controller E-Bike Testing Device is designed for efficient diagnosis of brushless motors and their controllers in electric bicycles, scooters, and electric cars. This compact and lightweight device provides quick and accurate detection of various component problems, ensuring optimal performance and safety of your electric vehicle.
Key features include high-strength construction, efficient fault detection, portability, and a self-check function for reliable operation.

Figure 1: Application range of the Oumefar Brushless Motor Controller E-Bike Testing Device, suitable for electric scooters, electric vehicles, and electric bikes.
2. Product Overview and Components
The testing device features a durable plastic shell and high-quality electronic components. It is designed for ease of use with clearly labeled connection points and indicator lights.
2.1 Main Components
- Main Unit: White plastic casing with control panel.
- Battery Switch: Red toggle switch for power control.
- Indicator Lights: LEDs for controller phases (A, B, C), motor phases (A, B, C), Hall signals (Ha, Hb, Hc), 5V controller output, throttle grip, and brake lever.
- Connection Cables: Multiple color-coded cables with alligator clips and white connectors for various test points.

Figure 2: Top and bottom view of the testing device. The bottom panel houses the battery compartment.

Figure 3: Detailed view of the device, showing the one-touch start switch, high-quality rubber sleeves for insulation, strong alligator clips for firm clamping, and pure copper wires for excellent conductivity.
3. Specifications
| Feature | Specification |
|---|---|
| Brand | Oumefar |
| Model Number | Oumefar724h3o56rp |
| Dimensions | 115mm x 80mm x 26mm (approx. 4.5in x 3.1in x 1in) |
| Power Source | Battery Powered (9V DC minimum operating voltage) |
| Color | Black |
| Item Weight | 0.15 Kilograms (approx. 5.3 ounces) |
| Measurement Type | Ohmmeter, Voltmeter, Multimeter (for internal testing logic) |
| Material | Plastic shell and electronic components |

Figure 4: Dimensions of the Oumefar Brushless Motor Controller E-Bike Testing Device.
4. Setup and Connections
Before use, ensure a 9V battery is installed in the battery compartment located on the underside of the device. Observe polarity when installing the battery.
4.1 Connecting for Testing
The device uses color-coded cables and connectors to interface with the brushless motor and controller. Refer to the labels on the device for correct connections.
- Controller Connections: Connect the three main phase wires (A, B, C) from the controller to the corresponding inputs on the testing device using the alligator clips.
- Motor Connections: Connect the three main phase wires (A, B, C) from the motor to the corresponding inputs on the testing device. Also, connect the Hall sensor wires (Ha, Hb, Hc) and the 5V power supply from the motor to the designated points.
- Throttle and Brake: Connect the throttle grip and brake lever wires to their respective inputs on the tester to check their functionality.
- Battery: Ensure the device is powered by a 9V battery.

Figure 5: Example of the testing device connected to an e-bike system for diagnostic purposes.

Figure 6: Detailed view of the connection labels on the device for accurate wiring.
5. Operating Instructions
The device allows for quick detection of various issues within brushless motor systems.
5.1 Powering On and Self-Check
After making all necessary connections, switch the red 'battery switch' to the ON position. The device will perform a self-check. If all internal components are functioning correctly, the indicator lights will respond as expected during the self-check sequence.
5.2 Diagnostic Procedures
The device can detect the following component problems:
- Brushless Controller: Checks the functionality of the electronic speed controller.
- Brushless Motor: Detects issues with motor Hall sensors and motor windings.
- Phase Angle: Verifies the 120° or 60° phase angle of the brushless motor and controller.
- Throttle and Brake Handle: Tests the operational status of the throttle and brake input signals.
- Wiring: Assists in identifying correct wiring configurations between the brushless motor and controller (supports 36 connection methods).

Figure 7: Overview of component problems detectable by the device.
6. Maintenance
To ensure the longevity and accurate performance of your Oumefar Brushless Motor Controller E-Bike Testing Device, follow these maintenance guidelines:
- Cleaning: Wipe the device with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the plastic casing or electronic components.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. Remove the 9V battery if the device will not be used for an extended period to prevent battery leakage.
- Handling: Handle the device with care to avoid physical impact or dropping, which could damage internal circuitry.
- Cable Inspection: Periodically inspect the connection cables and alligator clips for any signs of wear, fraying, or damage. Replace damaged cables to ensure safe and accurate testing.
7. Troubleshooting
If you encounter issues while using the Oumefar Brushless Motor Controller E-Bike Testing Device, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Dead or incorrectly installed 9V battery. | Check battery polarity and replace with a fresh 9V battery. |
| No indicator lights illuminate during testing. | Incorrect or loose connections to the motor/controller. | Verify all connections are secure and match the labels on the device. Ensure the motor/controller is powered. |
| Inaccurate or inconsistent readings. | Damaged test leads or poor contact. | Inspect test leads for damage. Ensure alligator clips make firm contact with terminals. |
| Device does not work with mid-drive motors. | Compatibility limitation. | This device is primarily designed for hub motors and standard brushless controllers. It may not be compatible with all specialized mid-drive motor systems. |
| Connector does not match existing wiring. | Non-standard connectors on the e-bike/scooter. | The device uses common connectors and alligator clips. If your system has unique connectors (e.g., Higo), adapters may be required, or direct connection to individual wires might be necessary with caution. |
If the problem persists after attempting these solutions, please contact customer support.
8. Warranty Information
Oumefar products are manufactured to high-quality standards. This product is covered by a limited warranty against defects in materials and workmanship for a period specified at the time of purchase. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accident, unauthorized modification, or normal wear and tear.
9. Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Oumefar customer support through the retailer where the product was purchased or visit the official Oumefar website for contact information.
We are committed to providing reliable products and support to our customers.