1. Introduction
Thank you for choosing the NULKOMMA E-Bike Pedal Assist Sensor (PAS). This sensor is designed to enhance your electric bicycle riding experience by providing intelligent power assistance based on your pedaling. This manual provides essential information for the proper installation, operation, and maintenance of your PAS sensor.
Please read this manual thoroughly before installation and use to ensure optimal performance and safety.
2. Product Overview
The NULKOMMA Pedal Assist Sensor is a crucial component for electric bicycles, providing power assistance by detecting pedal rotation. It features 12 magnetic points for precise detection and is constructed from durable materials for longevity.
- Type: Pedal Assist Sensor (PAS)
- Magnetic Points: 12 pieces for accurate pedal detection.
- Material: Plastic magnetic points and steel construction.
- Durability: Small in size, sturdy, and designed for long-term use.
- Connector: 4-pin waterproof plug.
Figure 2.1: NULKOMMA Pedal Assist Sensor and its corresponding 12-magnet disk.
Figure 2.2: Detailed view of the sensor, magnet disk with dimensions (34mm sensor ring, 66mm magnet disk), and the 4-pin female connector.
Figure 2.3: Close-up of the 12-magnet disk, which attaches to the crank arm to provide rotational data to the sensor.
Figure 2.4: Close-up of the 4-pin waterproof connector, ensuring reliable connection in various weather conditions.
3. Important Considerations
This PAS sensor is designed with 12 magnetic points. If your e-bike system previously used a PAS with a different number of magnetic points (e.g., 5, 8, or 10), it is highly probable that you will need to adjust the PAS parameters on your e-bike's display unit. Failure to do so may result in incorrect power assistance levels or system malfunction.
Refer to your e-bike display's instruction manual for guidance on how to access and modify PAS settings. If you are unsure, consult with a qualified e-bike technician.
4. Setup and Installation
Proper installation is crucial for the correct function of the pedal assist sensor. The sensor typically mounts near the crank arm, detecting the rotation of the magnet disk.
- Prepare the Crank Arm: Ensure the area around your bicycle's crank arm and bottom bracket is clean and free from debris. You may need to remove the left crank arm to install the magnet disk.
- Install the Magnet Disk: Slide the 12-magnet disk onto the bottom bracket spindle, ensuring it is securely seated and does not interfere with the crank arm rotation. The magnets should face outwards towards where the sensor will be mounted.
- Mount the Sensor: Position the sensor unit on the bicycle frame or bottom bracket shell, ensuring it is aligned with the magnet disk. The sensor should be close enough to detect the magnets but not touching them. A typical gap is 1-3mm. Secure the sensor using appropriate fasteners (not included, typically zip ties or clamps).
- Connect the Wiring: Connect the 4-pin waterproof plug from the PAS sensor to the corresponding port on your e-bike controller or wiring harness. Ensure the connection is firm and secure.
- Test Functionality: After installation, rotate the pedals by hand to verify that the sensor detects rotation. If your e-bike has a display, check for any PAS indicators or error codes.
- Adjust Display Settings (if necessary): As noted in Section 3, if your previous PAS had a different number of magnets, adjust the PAS parameters on your e-bike display to match the 12-magnet configuration.
Note: Specific installation steps may vary depending on your bicycle's frame design and existing e-bike system. If you are unsure, professional installation is recommended.
5. Operating Instructions
The NULKOMMA PAS sensor operates automatically once installed and connected to your e-bike system. When you begin pedaling, the sensor detects the rotation of the magnet disk and sends a signal to your e-bike controller. The controller then activates the motor to provide power assistance based on your selected assist level on the display.
- Pedal to Activate: The motor assistance will engage only when you are pedaling. The harder or faster you pedal, the more assistance the system may provide, depending on your e-bike's settings and assist level.
- Assist Levels: Use your e-bike's display unit to select different levels of pedal assistance (e.g., Eco, Tour, Sport, Turbo). Higher levels provide more motor power.
- Disengagement: The motor assistance will disengage when you stop pedaling or apply the brakes.
The intelligent design of this sensor ensures that power assist is determined by the rotation speed of your pedals, making the pedaling process lighter and more energy-efficient.
6. Maintenance
To ensure the longevity and reliable performance of your NULKOMMA PAS sensor, follow these simple maintenance guidelines:
- Keep Clean: Regularly clean the sensor and magnet disk to prevent dirt, mud, or debris from interfering with its operation. Use a soft, damp cloth. Avoid harsh chemicals.
- Check Connections: Periodically inspect the 4-pin waterproof plug and cable for any signs of wear, damage, or loose connections. Ensure the plug is securely seated.
- Verify Alignment: Ensure the sensor remains properly aligned with the magnet disk and that the gap between them is maintained (typically 1-3mm). Adjust if necessary.
- Avoid Impact: Protect the sensor from physical impact, which can damage its internal components or housing.
- Water Exposure: While the plug is waterproof, avoid submerging the sensor or subjecting it to high-pressure water jets, which could compromise its seals.
7. Troubleshooting
If you encounter issues with your PAS sensor, refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No pedal assist / Motor not engaging |
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| Inconsistent or erratic assist |
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| Incorrect plug type (e.g., 3-pin instead of 4-pin) | Product received does not match description. | Verify the received product against the order details. If incorrect, contact the seller for a replacement. This model is specified with a 4-pin plug. |
If the problem persists after attempting these solutions, please contact NULKOMMA customer support or a qualified e-bike technician.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | chuanganqi-02 |
| Brand | NULKOMMA |
| Type | Pedal Assist Sensor (PAS) |
| Magnetic Points | 12 pcs |
| Color | Black |
| Material | Plastic magnetic points, Steel |
| Item Weight | 40 Grams |
| Waterproof Plug | 4-pin Male SM Plug |
| Cable Length | 410mm |
| Manufacturer Part Number | nkm-chuanganqi |
| UPC | 714855701868 |
9. What's in the Box
The NULKOMMA E-Bike Pedal Assist Sensor package includes:
- 1 x E-Bike Pedal Assist Sensor (PAS)
Note: The 12-magnet disk is typically included as part of the sensor unit or as a separate component. Ensure all parts are present upon unboxing.
10. Warranty
This NULKOMMA Pedal Assist Sensor comes with a 180-day warranty from the date of purchase. This warranty covers manufacturing defects and material faults under normal use. It does not cover damage resulting from improper installation, misuse, accidents, modifications, or normal wear and tear.
For warranty claims or inquiries, please retain your proof of purchase and contact NULKOMMA customer support.
11. Support
For further assistance, technical support, or questions regarding your NULKOMMA E-Bike Pedal Assist Sensor, please visit the official NULKOMMA store or contact their customer service department.
NULKOMMA Store: https://www.amazon.com/stores/NULKOMMA/page/4F62B541-AE1E-45AA-AA81-301190F2EFC4
When contacting support, please have your product model number (chuanganqi-02) and purchase details readily available.