Xiaomi Qicycle EF1 Electric Bicycle Torque Sensor User Manual

1. Introduction

This manual provides essential information for the proper installation, operation, and maintenance of your original torque sensor for the Xiaomi Qicycle EF1 Electric Folding Bicycle. The torque sensor is a critical component that detects your pedaling force and signals the motor to provide assistance, enhancing your riding experience.

2. Safety Information

Please read and understand all safety instructions before attempting installation or maintenance. Failure to follow these instructions may result in injury, damage to the product, or damage to your bicycle.

• Always disconnect the e-bike's battery before performing any installation or maintenance to prevent electrical shock or accidental activation.
• Wear appropriate safety gear, including gloves and eye protection.
• Ensure all connections are secure and properly insulated to prevent short circuits.
• If you are unsure about any step, consult a qualified bicycle mechanic or the manufacturer's support.
• Keep small parts out of reach of children.

3. Package Contents

Verify that all items are present and undamaged upon opening the package:

• 1x Original Torque Sensor (Model: SP 1023-A) with integrated wiring and connector.

4. Installation Guide

This section outlines the general steps for installing the torque sensor. Specific procedures may vary slightly depending on your bicycle's current configuration. Professional installation is recommended if you are not familiar with e-bike component replacement.

4.1. Preparation

1. Park your Xiaomi Qicycle EF1 on a stable surface or use a bike stand.
2. Turn off the e-bike and disconnect the main battery pack to ensure no power is supplied to the system.
3. Identify the location of the existing torque sensor, typically near the bottom bracket or crank arm.
4. Gather necessary tools, which may include Allen wrenches, screwdrivers, and possibly a crank puller.

4.2. Removing the Old Sensor (if applicable)

1. Carefully disconnect the electrical connector of the old sensor from the e-bike's wiring harness.
2. Unscrew any mounting bolts or fasteners securing the old sensor to the bicycle frame or bottom bracket assembly.
3. Gently remove the old sensor, noting its orientation and placement for reference.

4.3. Mounting the New Sensor

1. Position the new torque sensor (Model SP 1023-A) in the correct orientation, aligning its mounting holes with the corresponding points on your bicycle.
2. Secure the sensor using the appropriate screws or fasteners. Ensure it is firmly attached but do not overtighten, which could damage the sensor or frame.

4.4. Connecting the Wiring

1. Locate the orange electrical connector on the sensor's cable.
2. Carefully align and connect this connector to the corresponding port on your e-bike's wiring harness. Ensure a snug and secure connection.
3. Route the cable neatly and secure it with cable ties if necessary, ensuring it does not interfere with moving parts or get pinched.

4.5. Post-Installation Check

1. Reconnect the e-bike's battery.
2. Turn on the e-bike and perform a functional test. Pedal gently to ensure the motor provides assistance smoothly and consistently.
3. Check for any error codes or unusual behavior.

5. Operation

The torque sensor operates automatically once installed and connected. It continuously measures the force applied to the pedals and communicates this data to the e-bike's motor controller. The motor then provides proportional assistance, making your pedaling feel more natural and efficient.

• Pedal Assist Levels: The level of motor assistance is typically controlled by the e-bike's display unit, allowing you to select different modes (e.g., Eco, Standard, Sport). The torque sensor's function remains consistent across these modes, providing input based on your pedaling effort.
• Natural Riding Feel: Unlike cadence sensors that only detect pedaling motion, a torque sensor provides a more intuitive riding experience by responding directly to your power output.

6. Maintenance

To ensure the longevity and optimal performance of your torque sensor, follow these simple maintenance guidelines:

• Regular Cleaning: Keep the sensor and its surrounding area clean from dirt, mud, and debris. Use a soft, damp cloth for cleaning. Avoid high-pressure washing directly on the sensor.
• Inspect Connections: Periodically check the electrical connector for corrosion, damage, or loose connections. Ensure it remains securely plugged in.
• Check Mounting: Verify that the sensor remains securely mounted to the bicycle frame. Tighten any loose screws if necessary, but do not overtighten.
• Avoid Impact: Protect the sensor from physical impact, as this can damage its internal components.

7. Troubleshooting

If you experience issues with your e-bike's pedal assist system, consider the following troubleshooting steps:

7.1. No Pedal Assist or Inconsistent Assist

• Check Battery: Ensure the e-bike battery is fully charged and properly connected.
• Inspect Connections: Verify that the torque sensor's electrical connector is securely attached to the wiring harness. Disconnect and reconnect to ensure a good contact.
• Sensor Alignment: Ensure the sensor is correctly aligned and not obstructed by any other components.
• Damage Check: Visually inspect the sensor and its cable for any signs of physical damage.
• E-bike Display: Check your e-bike's display for any error codes related to the motor or sensor. Consult your e-bike's main user manual for error code interpretations.

7.2. User Tips

• Always ensure the sensor is clean, especially around the sensing area, to prevent false readings.
• If replacing an old sensor, carefully compare the new sensor's physical dimensions and connector type to ensure compatibility before installation.
• For optimal performance, periodically check the tightness of the mounting screws.

8. Specifications

9. Warranty and Support

For warranty information, technical support, or replacement parts, please contact the original seller or the manufacturer directly. Keep your purchase receipt as proof of purchase.