IC Realtime 1/2/4 Channel H.264 Network Video Server - Manual (Page 82)

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 NVS color or brightness setup is not correct.
6. Can not search records via the Web.
There are following possibilities:
 HDD ribbon is damaged.
 HDD is broken.
 Upgraded program is not compatible.
 The recorded file has been overwritten.
 Record function has been disabled.
7. 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.
8. 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.
9. 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.
10. 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.
11. Motion detection function does not work.
There are following possibilities:
 Period setup is not correct.