Kedacom NVR1821, Installation Manual, Page: 18 / 24

5 Power-on Self-Test
After the system is started up, check whether the status of the power button on the front panel
is normal.
If yes, the system is operating properly.
If not, contact the system administrator or the local authorized Kedacom agent
.
To prevent the risk of lightning, you are advised to ensure the following:
The NVR1821 is well grounded.
The green-yellow wire is properly connected to the ground bolt of the NVR1821.
The connection between the natural points of alternating current (AC) outlets and
the earth ground is normal.
Based on onsite conditions, install lightning arrestors.
6.2 Lithium Battery Replacement
The system clock uses the CR2032 button cell lithium battery. When the battery loses its
charge, the system may malfunciton. You must call the local authorized Kedacom agent to
replace the battery. Do not attempt to replace the battery yourself.
Dispose of used batteries according to the manufacturer's instructions. If instructions are
unavailable, contact your local waste disposal agency to learn about the nearest battery
recycling place.
6 Product Care
6.1 Lightning Protection
6.3 Miscellaneous
Do not place heavy objects on the NVR1821.
Do not block the air vent.
Switch off the NVR1821 if you want to let it idle for a long period of time.
Regularly check the status of hubs and switches to ensure that the NVR1821 is properly
connected to the transport network.
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