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Alhua - Dahua DVR Manual

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FAQ 292
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 might 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.
… 305 …


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  • We have lost power on our DVR, there is power up to the power supply,
    and the whole system is coupled to a UPS system for some time......
    we have had zero lightning and any effects of load shedding is nullified by UPS system,
    could you kindly inform what could be wrong PLEASE ?
    Chris Gibson 0827932600 Submitted on 22-2-2023 at 12:16

    Reply Report abuse


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