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DIAGRAM 7‐3 WD DETECTION
7.3.
COMMON FAULTS
DVR
startup
failure
or
continuously
reboot
Possible reasons:
1. The system has been damaged from a bad DVR update.
2. There is a problem with the DVR main board error, please contact supplier.
3. There is an HDD error. Replace faulty HDD.
Remote
control
does
not
work
Possible reasons:
1. Check for batteries in remote control , especially Positive and Negative;
2. Check for batteries’ power;
3. Check if remote receiver is obscured;
3 Check if DVR address correspond to the remote control address .
DVR
cannot
control
PTZ
Possible reasons:
1. RS‐485 cable connection error, A, B ports are inversely connected;
2. PTZ decoder, protocol, baud rate, address are incorrect;
3. Parallel connect a 120Ω resistance to resolve signal reflex caused by too many PTZs on the line.
4. The RS‐485 port on DVR is defective
Blurred
screen
in
preview
mode
Possible reasons:
Please make sure your cameras match your video format selected in the General menu. E.g. camera is
NTSC standard but the DVR is PAL standard, the preview would be blurred.
Blurred
screen
in
playback
mode
or
failure
to
playback
records
Possible reasons:
1. Procedure error, reboot the DVR
