Appendix A Troubleshooting, Daily
Maintenance and Glossary
Daily Maintenance
• Check and maintain the device regularly.
• Regularly use a brush to clean the board, socket connector and chassis.
• Properly ground the device to protect against video disturbances.
• Keep the device away from static or induced voltage.
• Unplug the power cable before you remove the video signal cable or RS485 cable.
• To avoid HDD malfunction, always shut down the device properly using the Shutdown
function in the menu or by pressing the power button on the front panel for at least three
seconds.
• Locate the device away from the direct sunlight or other heating sources.
• Ensure that the device is properly ventilated.
NVR4200 Series User Guide
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