CCTV Qvis DVR series User Manual download pdf (Page 52)

5 COMMON FAULTS

DVR startup failure or continuously reboots

Possible reasons:

1. The system has been damaged from a bad DVR update.

2. There is a problem with the DVR main board, please contact supplier.

3. There is a HDD error. Replace faulty HDD.

Remote control does not work

1. Check for batteries in the remote control.

2. Check batteries’ power level.

3. Check if remote receiver is obscured.

4. Check if the DVR’s address corresponds to the remote control address.

DVR cannot control the PTZ camera

Possible reasons:

1. RS-485 cable connection error, A, B ports are inversely connected;

2. PTZ decoder, protocol, baud rate, address are incorrect;

3. Parallelly connect a 120Ω resistor to resolve signal reflex caused by too many

PTZs on the line.

4. The RS-485 ports in the DVR are 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

2. HDD error, test or change out the HDD

3. DVR hardware failure, contact your local supplier

1 2 ... 47 48 49 50 51 52 53 54 55

No comments

CCTV Qvis DVR series User Manual Page 52