User manual

17 Chapter 3
3.1.2 LED Indicators for System Status
Four LEDs are placed on the left side of the front panel to indicate system
health and activity. Refer to Table 3.1 for the LED definition summary.
When the system power is on, the power LED is always Green.
When the power LED is RED, it indicates a redundant power supply
module failure. To stop the alarm beep, press the Alarm Reset button.
Examine the redundant power supply module right away and replace the
failed module with a working one.
When the fan LED is RED, it indicates a failed cooling fan, and the alarm
is also activated. To stop the alarm beep, press the Alarm Reset button
and then replace the failed fan with a working one immediately.
If the temperature LED is RED, it means that inside of the chassis is
overheated (more than 50°C). An audible alarm will be activated. To stop
the alarm beep, press the Alarm Reset button. Inspect the fan filter and
the rear section of the chassis immediately. Make sure the airflow inside
the chassis is smooth and not blocked by dust or other particles.
Table 3.1: LED indicator functions
LED Description Green Red
Power System power Normal Abnormal
Hard Disk Hard disk drive activity Data access No light
Temperature Temperature in the
chassis
Normal Abnormal
Fan Cooling fan status Normal Abnormal