Dahua Smart 1U User Manual page 275

Sensitivity is too low.

For some versions, there is hardware limit.

13. Cannot log in client-end or web.
There are following possibilities:
For Windows 98 or Windows ME user, please update your system to Windows 2000 sp4.

Or you can install client-end software of lower version. Please note right now, our DVR is
not compatible with Windows VISTA control.
ActiveX control has been disabled.

No dx8.1 or higher. Please upgrade display card driver.

Network connection error.

Network setup error.

Password or user name is invalid.

Client-end is not compatible with DVR program.

14. There is only mosaic no video when preview or playback video file remotely.
There are following possibilities:
Network fluency is not good.

Client-end resources are limit.

There is multiple-cast group setup in DVR. This mode can result in mosaic. Usually we do

not recommend this mode.
There is privacy mask or channel protection setup.

Current user has no right to monitor.

DVR local video output quality is not good.

15. Network connection is not stable.
There are following possibilities:
Network is not stable.

IP address conflict.

MAC address conflict.

PC or DVR network card is not good.

16. Burn error /USB back error.
There are following possibilities:
Burner and DVR are in the same data cable.

System uses too much CPU resources. Please stop record first and then begin backup.

Data amount exceeds backup device capacity. It may result in burner error.

Backup device is not compatible.

Backup device is damaged.

17. Keyboard cannot control DVR
There are following possibilities:
DVR serial port setup is not correct.

Address is not correct.

When there are several switchers, power supply is not enough.

Transmission distance is too far.

18. Alarm signal cannot be disarmed.
There are following possibilities:
Alarm setup is not correct.

Alarm output has been open manually.

Input device error or connection is not correct.

FAQ 265