Electric Scooter Error Codes Explained – HALO KNIGHT Display Troubleshooting Guide

Electric scooter error codes are designed to protect the system and inform riders of abnormal conditions. When an error code or warning icon appears on the display, it does not always mean a serious failure—but it does indicate that the scooter has detected an issue that needs attention.

This guide explains the most common electric scooter error codes used on HALO KNIGHT scooters, including QS displays, Panda displays, Smart LCD central displays, and the T104 (2025) LED display. You will learn what each error code means, which issues require immediate attention, and when to contact official after-sales support.

This article is intended for basic diagnosis and understanding only and helps riders quickly identify common problems before further troubleshooting.

Why Electric Scooter Error Codes Appear

Electric scooter displays monitor key systems such as:

• Battery voltage and BMS communication

• Motor and Hall sensor status

• Throttle and brake signals

• Controller temperature and communication

When an abnormal signal is detected, the display shows an error code or warning icon to prevent unsafe riding and protect core components.

QS Display Error Codes Explained

The QS display uses decimal error codes to indicate system status.

📌 Note:
Some codes indicate system states (cruise / brake) rather than faults. This is normal behavior.

Panda Display Error Symbols Explained

The Panda display uses icon-based warnings instead of numeric error codes.

📸 Panda Display Error Icons Table

Icon	Meaning
	Electric brake fault (Normal during braking – indicates electronic brake is working)
	Motor fault
	Display fault
	Controller fault

📌 Important:
The exclamation icon appearing during braking is normal behavior and confirms that the electronic brake is active.

Smart LCD Central Display Error Codes

The Smart LCD central display (used on newer HALO KNIGHT models) shares a similar logic to the QS system and displays decimal error codes.

📌 This display is designed to provide clear, centralized fault information and improve troubleshooting efficiency.

T104 (2025) LED Display Error Codes

The T104 (2025) LED display uses an E-code system, specifically designed for dual-motor configurations.

📌 Warnings vs Errors:
Some codes (such as temperature or stall warnings) are protective alerts and may clear automatically after cooling down or restarting.

What Should You Do When an Error Code Appears?

Follow these basic steps:

1. Stop riding safely

2. Power off the scooter

3. Allow the scooter to cool down (if temperature-related)

4. Restart and check if the error clears

5. Avoid repeated riding if the error persists

⚠️ Do not disassemble electrical components yourself.

When to Contact HALO KNIGHT After-Sales Support

Please contact official support if:

• The same error code appears repeatedly

• Multiple error codes occur simultaneously

• The scooter cannot power on or ride normally

📩 HALO KNIGHT After-Sales Support
Email: service@haloknights.com

Please include:

• Scooter model

• Display type

• Error code or icon shown

• Short video or photo if possible

Final Notes on Error Codes and Riding Safety

Electric scooter error codes are an essential part of modern safety and protection systems. Understanding what they mean helps riders respond calmly and correctly, avoiding unnecessary damage or unsafe riding behavior.

HALO KNIGHT designs its scooters with multi-layer system protection to ensure reliability, performance, and rider safety.