Network Video Recorder
User Manual
Network Video Recorder
45
Diagram 7 3 WD Detection
8.3. Common Faults:
NVR startup failure or continuously reboot
Possible reasons:
1.The system has been damaged from a bad NVR update.
2.There is a problem with the NVR main board error, please contact supplier.
3.There is an HDD error. Replace faulty HDD.
Remote control does not work
Possible reasons:
1.Check for batteries in remote control, especially positive and Negative.
2.Check for batteries‟ power.
3. Check if remote receiver is obscured.
4.Check if NVR address corresponds to the remote address.
NVR cannot control PTZ
Possible reasons:
1.RS-485 cable connection error, A, B ports are inversely connected;
2.PTZ decoder, protocol, baud rate, address are incorrect;
3.Parallel connect a 120
Ω resistance to resolve signal reflex caused by too many PTZs on the line.
4. The RS-485 on the NVR is defective
Blurred screen in preview mode
Possible reasons:
Please make sure your cameras match your video format selected in the General menu. E.g. camera is
NTSC standard but the NVR is PAL standard, the preview would be blurred.
Blurred screen in playback mode or failure to playback records
Possible reasons:
1.Procedure error, reboot the NVR
2.HDD error, test or change out the HDD
3.NVR hardware failure, contact your local supplier
