Troubleshooting

1 Overview

During the application of lidar, users may encounter various issues affecting its normal operation. This document aims to help users quickly troubleshoot and resolve the common issues encountered when using Hesai lidar products.

2 Basic Operation Issues

2.1 How to Check Whether the Lidar is Starting Properly

Before powering on the lidar:

Ensure the current ambient temperature meets the operating temperature requirements of the lidar product.
Ensure the input voltage and current at the power supply end meet the electrical requirements of the lidar product.
Confirm that the power adapter is functioning properly and all cables (power cables, Ethernet cables, etc.) are securely connected and properly attached.

After powering on the lidar:

If Hesai standard connection box is used, check the indicator light on the box: Under normal conditions, the blue LED indicator light on the connection box should be always ON (as shown below).

If the indicator light is off, check the power supply status and hardware connections (if possible, use another working connection box or lidar for cross-testing to confirm if the issue is with the connection box itself).
If the indicator light is flashing, it may be due to the mismatched Ethernet configurations between the lidar and the connection box (e.g., not the same Ethernet bandwidth settings or mismatched master-slave modes). Please contact Hesai technical support for further troubleshooting.

Check if the lidar is emitting light: Use an infrared camera or a camera capable of detecting infrared wavelengths (recommended: iPhone front camera or Huawei phones) to capture the surface of the lidar's lens and check if there is any visible purple-red flashing spots (similar to the image shown below).

If the lidar is connected properly but not emitting light, check if it is set to standby mode (in standby mode, the lidar stops rotating and does not emit light). Users can check this via the web interface or LidarUtilities software, as shown below:

Web control page (Pandar series/QT series/XT series)