Grandstream Networks GVR3550 User Manual page 119

13. Unable to close alarm signal
Incorrect alarm settings
Manually enabled alarm output
Input device failure or wrong connection
Version problems, upgrade to solve it.
14. The alarm doesn't work
Incorrect alarm settings
Incorrect connection of the alarm cables
Incorrect alarm input signal
Two circuits having been connected to one alarm simultaneously
15. Unable to control the GVR3550 via remote control
Remote control distance is too far or the control angle is far too partial.
Run-down batteries
Damaged control/front panel
16. Insufficient record time
Large stream caused by poor quality of the front camera, dirty camera Lens, backlight
installation, unadjusted iris.
Insufficient HDD capacity
Damaged HDD
17. Unable to play downloaded file
You have no installed player or unplugged the external storage device improperly.
18. No image, black screen
Check whether the IP of remote IPC is correct
Check whether the port No. of remote IPC is correct
Check whether the username/password of remote IPC is correct
Check whether the internet connection of remote GVR3550 is correct
19. Missing display screen
Check the resolution the LCD supports. If the GVR resolution is 1920*1080, the LCD should
support 1920*1080 resolution.
20. No LCD HDMI output
Check the HDMI cable and whether LCD works in HDMI mode
21. Multi-camera monitoring record lag
Please check the network bandwidth. Gigabit network is recommended. The computer
suggested for multi-camera monitoring: Quad Core CPU, discrete graphics, 256M memory
or higher.
Grandstream Networks, Inc. GVR3550 User Manual
Firmware Version 1.0.0.65
Page 119 of 120
Last Updated: 10/2014