These error codes show up when you search the log of your Dahua DVR or NVR. The list below explains their respective meaning and possible solution.

Dahua error code 0x00
Explanation: DVR/NVR has rebooted normally: routine maintenance reboot or a reboot made by the user.
Troubleshooting tip: Check in Settings >System > Auto Maintain to ensure that the DVR is not set to reboot. By default it’s set to reboot every Tuesday at 2AM. For maintenance reasons it’s recommended to reboot the unit once a week.

Dahua error code 0x01
Explanation: Abnormal reboot: power loss, system crash, or other undefined abnormality.
Troubleshooting tip: Make sure the unit is getting enough power, in this case you may check the power adapter (sometimes it goes bad), the power outlet or whether your power grid went randomly down. Other suggestions: reset the unit to factory default and ppdate to the latest firmware.

Dahua error code 0x02
Explanation: Log stuck.
Troubleshooting tip: Clear the log. Go to Information > Log and click Clear.

Dahua error code 0x03
Explanation: Hard drive read-write slow: hard drive read-write speed has dropped significantly; hard drive capacity has seriously decreased; hard drive is dead.
Troubleshooting tip: Check in Settings > Storage > HDD Manager and look at the Status. If it is not “Normal”, it’s likely that there is a hard drive error and it needs to be replaced. Sometimes formatting the hard drive will fix the issue.

Dahua error code 0x04
Explanation: Abnormal recording: Over 3 minutes with no stream on the recording channel, this means that certain channels experienced video loss.
Troubleshooting tip: Check all of the cameras’ connections and ensure they are powered correctly.

Dahua error code 0x05
Explanation: Bad track: The hard drive has a bad track.
Troubleshooting tip: Check in Settings > Storage>HDD Manager and look at the Status. If it is not “Normal”, it’s likely that there is a hard drive error and it needs to be replaced. You can try to format the hard drive.