VDH-NK385 Hardware Manual
10
3. Recording not enabled
Q 6.
No audio sound
A : The possible causes:
1. Not powered-microphone
2. Not powered-speaker
3. Audio cable error
4. NVR hardware error
Q 7.
Wrong time
A : The possible causes:
1. Wrong setting
2. Bad battery connection or low voltage
3. Bad frequency oscillator
Q 8.
Motion detection not function
A : The possible causes:
1. Wrong schedule settings
2. Wrong area settings
3. Low sensitivity
4. Hardware limitation for different version
Q 9.
Mosaic or no video when Network preview and file playback
A : The possible causes:
1. Network traffic jam
2. Bandwidth limitation in the NVR side
3. Group mode is used in the NVR networking setting. More mosaics in
group mode, not recommended.
4. Masks or channel protection in NVR side
5. No rights for the user account
6. Bad NVR output
Q 10.
Networking not stable
A : The possible causes:
1. Networking not stable
2. IP conflict
3. MAC conflict
4. LAN card error (PC/NVR)
Q 11.
The remote controller can not work
A : The possible causes:
1. Wrong control address
2. Long distance or poor angle
3. Battery run out
