DVR systems DVRxx04HF-U Series - Manual (Page 174)

164
z MAC address conflict.
z PC or DVR network card is not good.
16. Burn error /USB back error.
There are following possibilities:
z Burner and DVR are in the same data cable.
z System uses too much CPU resources. Please stop record first and then begin
backup.
z Data amount exceeds backup device capacity. It may result in burner error.
z Backup device is not compatible.
z Backup device is damaged.
17. Keyboard can not control DVR.
There are following possibilities:
z DVR serial port setup is not correct
z Address is not correct
z When there are several switchers, power supply is not enough.
z Transmission distance is too far.
18. Alarm signal can not been disarmed.
There are following possibilities:
z Alarm setup is not correct.
z Alarm output has been open manually.
z Input device error or connection is not correct.
z Some program versions may have this problem. Please upgrade your system.
19. Alarm function is null.
There are following possibilities:
z Alarm setup is not correct.
z Alarm cable connection is not correct.
z Alarm input signal is not correct.
z There are two loops connect to one alarm device.
20. Remote control does not work.
There are following possibilities:
z Remote control address is not correct.
z Distance is too far or control angle is too small.
z Remote control battery power is low.
z Remote control is damaged or DVR front panel is damaged.
21. Record storage period is not enough.
There are following possibilities: