OV-7204 / OV-7208 H.264 DVR User Manual
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Appendix 1. Q&A
1. How to recover password if forgotten?
A: Please contact technicians from vender or manufacturer if you have forgotten
the password. Please set a safe password easy to remember (don’t set simple
password like 123456 if you need more safety).
2. No video output signal?
A: Please confirm that the video output port is connected to the VIDEO OUT, and
ensure BNC in DVR interface is in good connection, whether BNC cable is used
for too long time and is aging, and ensure N system/P system selection is right.
3. The system can not detect the hard disk?
A: If the system can not detect the hard disk, please confirm that hard disk data
cable is connected well to power cable, hard disk’s interface in main board is good,
we recommend to re-plug hard disk data cable again; please confirm power
adaptor is DC12V 3A (the range is 3A--5A), you can replace the power supply test;
Seagate brand hard disk is desirable.
4. What is the affect to equipment by DVR’s heat?
A: DVR will produce certain heat during its running, please put DVR at a safe place
with good ventilation, to avoid to damage stability and service life of the system
because of high temperature for long-time.
5. How long can a 4-channel or 8-channel DVR record if 1000G hard disk is used?
A: Please refer to Appendix 2 “hard disk space calculation”.
6. DVR’s remote controller can not work, but the monitor screen is right and the panel
buttons can be used properly?
A: If the controller is pointing to the IR signal on equipment front panel, but the
operation is still invalid, please check the batteries in remote controller, if above
problems are excluded, please check the health of the remote controller.
7. The “manual recording” and “stop recording” in front panel and shortcut menu can
not work?
A: This function can only work when the mainframe is not under recording status,
only timing recording is started and it can work in the non-selected period.
8. Is playback available while recording? Is multi-channel playback available?
A: Yes, this system can support playback while recording. 4-channel DVR can
support 4 channels playback at the same time, 8-channel DVR can only support
single channel playback.
9. The records in DVR hard disk can be removed or not?
A: For safety of the document, you can not delete partial records. If it is necessary,
you can format the hard disk.
10. E-mail alerting is not functioning?
A: Please follow the instruction strictly, check whether there is any letter error or
unnecessary space, and please check your mail server’s functionality if SSL
ordinary shutdown.
11. Can not find any information record when playback?
A: please check the hard disk data cable connection, and whether system time is
adjusted illegally. Try it several times, and test whether the hard disk is damaged if
