Enlight EN-898X - Manual (Page 30)

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7.About the LED panel and front panel
1. LED panel
Power LED: When
system turn on, the LED will be access.(green)
Fan Fail LED: When the Fan error or not active, the
LED will be show in and annunciator will
start.
HDD Activity LED: When the hard disk access, the
LED will be show in.(green)
Volt Alarm LED: When the voltage under standard
voltage or over standard voltage, the
LED will be show in and annunciator will
start.