The K5248 LCD is a display unit designed for e-bikes, providing various functions and information to enhance the riding experience. Manufactured by KING-METER TECHNOLOGY CO., LTD, located at No.15, Chenchang Road, Beichen Dist. Tianjin, 300134, CN, this display aims to offer clear and concise details regarding the e-bike's operation.

Function Description

The K5248 display offers a comprehensive set of functions, including:

Battery power indication: Shows the current battery level as a percentage.
Speed indication: Displays current speed, maximum speed, and average speed.
Distance indication: Tracks both single trip distance (TRIP) and total odometer distance (ODO).
Walk assist & Headlight indication: Provides visual cues for walk assist mode and headlight status.
Error code indication: Alerts the user to system malfunctions with specific error codes.
Various setting parameters: Allows users to customize display settings such as backlight brightness, display unit, speed limit, and wheel size.
Color Theme switch: Offers four different color themes for personalized display preferences.

Important Technical Specifications

Material and Color: K5248 products are made of PC material, designed to withstand temperatures between -20 to 60°C. The shell material ensures normal usage and good mechanical performance.
Dimensions: The manual includes detailed diagrams with specific measurements for the display unit.
Power Consumption: When the e-bike is powered off, the display will shut down, and the leakage current of the display is less than 1µA. If the e-bike is not used for more than 10 minutes, the display will automatically shut down.
Display Unit: Supports both Metric (km/h) and Imperial (Mile/h) units for speed and distance.
Speed Limit: Settable range for maximum speed is 12km/h to 40km/h.
Wheel Size: Settable values include 16, 18, 20, 22, 24, 26, 700C, and 28 inch to ensure accurate speed and mileage display.

Usage Features

Normal Operation:

On/Off: Long press the "MODE" button to turn the display on or off. The display will work normally once the controller powers on.
User Interface: The normal display interface shows current speed, PAS level, battery percentage, and allows switching between TRIP and ODO distance.
Color Theme Switch: Long press the "UP", "DOWN", and "MODE" buttons together for more than 2 seconds to cycle through four available color themes.
Walk Assist Mode: Press and hold the "DOWN" button for 2 seconds to activate walk assist mode, where the e-bike travels at a constant speed of 6km/h. This function is intended for pushing the e-bike by hand, not for riding.
PAS Level Selection: Short press the "UP" or "DOWN" button to switch PAS levels. The default range is 0-3 levels, with level 1 being the lowest and level 3 the highest motor output power.
Battery Indicator: The battery power is shown as a percentage bar. When fully charged, the power bar shows 100%.
Headlight On/Off: Long press the "UP" button for 2 seconds to turn the backlight on and off, and the controller will be informed to turn the headlight on or off accordingly.
Error Code: When an e-bike electronic control system fails, the display automatically indicates an error code. A detailed list of error codes is provided in Appendix 1.

User Settings:

To enter user settings, ensure the power is on, then press and hold the "UP" and "DOWN" buttons at the same time for 2 seconds. The display will enter the setting interface.
Backlight Brightness Setting: Press "UP" and "DOWN" to change brightness, short press "MODE" to switch to the next setting option.
Display Unit Setting (Metric / Imperial): Press "UP" and "DOWN" to select between km/h (metric) and Mile/h (imperial). Short press "MODE" to confirm and switch to the next setting option.
Speed Limit Setting: Press "UP" and "DOWN" to adjust the maximum speed. Short press "MODE" to confirm and switch to the next setting option.
Wheel Size Setting: Press "UP" and "DOWN" to select the appropriate wheel diameter for accurate speed and mileage. Short press "MODE" to confirm and switch to the next setting option.
Version Information Interface: This interface displays the software version number, useful for display maintenance.
To save and exit the setting interface, long press "MODE".

Maintenance Features

Troubleshooting (FAQ):
- Q: Why can't turn on the display? A: Please check whether the battery is turned on or the leakage lead wire is broken.
- Q: How to deal with the error code display? A: Contact the e-bike maintenance station in time.
Quality Assurance and Warranty Scope:
- Warranty Information: King-Meter will be responsible for all faults arising during normal operation that are caused by a quality defect.
- Warranty Period: The warranty time is 24 months from the day the display leaves the factory.
- Conditions Not Covered by Warranty:
  1. Shell opened.
  2. Connector damaged.
  3. After display out of factory, the shell is scratched or damaged.
  4. Lead wire of display scratch or break.
  5. The fault or damage is caused by force majeure (such as fire, earthquake, etc.) or natural disasters (such as lighting, flooding, etc.)
  6. Product exceeded warranty period.
Error Code Definition (Appendix 1):
- 21: Current Abnormal
- 22: Throttle Abnormal
- 23: Motor phase problem
- 24: Motor Hall defect
- 25: Brake Failed
- 30: Communication Abnormal
General Notes for Users:
- Be careful with safety during use. Do not attempt to release the connector when the battery is powered on.
- Try to avoid hitting the display.
- Do not split the waterproof sticker to avoid affecting waterproof performance.
- Do not modify system parameters to avoid parameter disorder.
- If an error code appears, have the display repaired.

King-Meter K5248 LCD - Page 13

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