1. Introduction
This manual provides instructions for the KEY DISP KD21P and KD21C E-bike Intelligent LCD Displays. These displays are designed as updated parts for electric bicycles, including Heybike models, offering essential information and control for your e-bike experience. The KD21P and KD21C models feature a waterproof 5-pin cable for reliable connection.
Important Note: This product is customized. All technical descriptions and product parameters must be confirmed with the seller's customer service after placing an order to ensure compatibility and correct functionality.
2. Specifications
| Feature | Detail |
|---|---|
| Product Name | E-bike Intelligent LCD Display |
| Model | KD21P / KD21C |
| Power Supply | 24V / 36V / 48V |
| Rated Working Current | 10mA |
| Maximum Working Current | 30mA |
| Off-state Leakage Current | <1μA |
| Working Temperature | -20℃ to 60℃ (-4°F to 140°F) |
| Storage Temperature | -30℃ to 70℃ (-22°F to 158°F) |
| Connector Type | 5-Pin Male Waterproof Cable |
| Package Dimensions (approx.) | 12 cm (L) x 6 cm (W) x 5 cm (H) |
| Package Weight (approx.) | 0.08 kg |
3. Package Contents
Upon opening your package, please ensure all items are present and in good condition:
- KEY DISP KD21P/KD21C E-bike LCD Display Unit
- Integrated 5-Pin Waterproof Cable
- Mounting Bracket (typically pre-attached or included)
If any items are missing or damaged, please contact customer service immediately.
4. Installation
Follow these steps to install your E-bike LCD Display:
- Mount the Display: Securely attach the display unit to your e-bike's handlebars using the provided mounting bracket. Ensure it is positioned for optimal visibility and accessibility while riding.
- Connect the Cable: Locate the corresponding female 5-pin waterproof connector on your e-bike's wiring harness. Carefully align the pins and firmly connect the display's 5-pin male waterproof cable. Ensure the connection is snug to maintain its waterproof integrity.
- Cable Management: Route the cable neatly along your e-bike frame, securing it with cable ties if necessary, to prevent it from interfering with moving parts or getting damaged.
- Initial Power-On: After installation, power on your e-bike to check if the display activates correctly.
Figure 1: Detailed view of the 5-pin male waterproof connector. This connector ensures a secure and water-resistant electrical link between the display and your e-bike.
Figure 2: The KD21P/KD21C display mounted on e-bike handlebars, demonstrating its rainproof design and active data display.
5. Operation
The display features three primary control buttons for easy navigation and function selection:
Figure 3: Front view of the display unit, showing the 'Up', 'Power', and 'Down' control buttons.
- Power Button (Middle):
- Press and hold to turn the display ON or OFF.
- Short press to cycle through different display modes or information screens (e.g., Odometer, Trip Distance, Max Speed, Average Speed).
- Up Button (Top):
- Increases the pedal assist level (PAS) or navigates upwards in menu settings.
- May activate headlight function with a long press (functionality may vary based on e-bike controller).
- Down Button (Bottom):
- Decreases the pedal assist level (PAS) or navigates downwards in menu settings.
- May activate walk assist mode with a long press (functionality may vary based on e-bike controller).
The display provides real-time information such as current speed, battery level, and pedal assist level. Its rainproof design ensures reliable performance in various weather conditions.
6. Care and Maintenance
- Cleaning: Wipe the display screen and casing with a soft, damp cloth. Avoid using abrasive cleaners or solvents that could damage the screen or plastic.
- Water Exposure: While the display is rainproof, avoid submerging it in water or exposing it to high-pressure water jets. Ensure the 5-pin connector remains securely fastened.
- Temperature: Operate and store the display within the specified temperature ranges (-20℃ to 60℃ for operation, -30℃ to 70℃ for storage) to ensure longevity.
- Cable Inspection: Periodically check the cable and connector for any signs of wear, damage, or corrosion.
7. Troubleshooting
If you encounter issues with your display, try the following steps:
- Display Not Turning On:
- Ensure your e-bike's battery is charged and turned on.
- Check the 5-pin cable connection to ensure it is fully seated and secure.
- Verify that the power button is pressed and held for the required duration.
- Incorrect Readings (Speed, Battery):
- Ensure all connections are secure.
- If the issue persists, it may indicate a sensor or controller problem on your e-bike, or a compatibility issue. Refer to your e-bike's manual or contact the seller.
- Display is Defective on Arrival:
- If the product is defective upon receipt, do not attempt to repair it. Document the issue with photos or videos and contact the seller immediately for assistance.
8. User Tips
- Confirm Compatibility: Due to the customized nature of this product, always confirm specific technical details and parameters with the seller's customer service before and after purchase to ensure it perfectly matches your e-bike model and controller.
- Gentle Handling: Although designed for outdoor use, treat the display with care to avoid physical damage.
9. Warranty and Support
For any questions, technical support, or warranty claims, please contact the seller directly. It is recommended to keep your purchase records for reference.
If you receive a defective product, please contact the seller with your order number and image/video evidence of the defect. The seller aims to resolve issues promptly.
