PLANET NVR-1620 - Manual (Page 17)

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Buttons Status Definitions
Power
ON Press and hold for 2 seconds
OFF Press and hold for 2 seconds
Reset
Restore
default
Press and hold for 5 seconds
Restart Press and hold for 2 seconds
Buzzer
Stop
STOP Press and release to stop buzzer right away
Buzzer Status Definitions
Beep
Complete
start
Beep once (indicating the system is fully started)
Initiating
restart
Beep once (Indicating the restart process has begun)
Initiating
shutdown Beep once (Indicating users to release the Power button
as the shutdown process has begun)
2.2.6 NVR-820 / NVR-1620 HDD Installation
1. Remove the screws on both sides (1 on each side) and remove the top case by
pulling it toward you.