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Dahua Network Video Server
User’s Manual
111
NVS color or brightness setup is not correct.
6. Can not search records via WEB.
There are following possibilities:
SD card is damaged.
Upgraded program is not compatible.
The recorded file has been overwritten.
Record function has been disabled.
8. There is no audio when monitor.
There are following possibilities:
It is not a power picker.
It is not a power acoustics.
Audio cable is damaged.
NVS hardware malfunctions.
9. There is audio when monitor but there is no audio when system playback.
There are following possibilities:
Setup is not correct. Please enable audio function
Corresponding channel has no video input. Playback is not continuous when the
screen is blue.
10. Time display is not correct.
There are following possibilities:
Setup is not correct
Battery contact is not correct or voltage is too low.
Crystal is broken.
11. NVS can not control PTZ.
There are following possibilities:
Front panel PTZ error
PTZ decoder setup, connection or installation is not correct.
Cable connection is not correct.
PTZ setup is not correct.
PTZ decoder and NVS protocol is not compatible.
PTZ decoder and NVS address is not compatible.
When there are several decoders, please add 120 Ohm between the PTZ
decoder A/B cables furthest end to delete the reverberation or impedance
matching. Otherwise the PTZ control is not stable.
The distance is too far.
12. Motion detection function does not work.
There are following possibilities: