3
If an alarm about the CPU overtemperature appears, several problems may
be the cause including the following:
■ Improper installation or damage of the air duct inside the chassis.
■ Fan and or air intake or output problems.
■ Excessive equipment room temperature (room temperature should be
between 10° C and 35° C (50° F - 95° F).
4
Inspect the fans in the power supplies on the rear left-hand side of the unit.
Verify that there are no obstructions or damage.
5
Inspect the air intake and output vents in the front panel and rear panel of the
unit. Verify that there are no obstructions or damage.
6
If the room temperature is too high, reduce the temperature at a rate of no
more than 10° C per hour until an acceptable temperature is reached.
7
Access the NetBackup Appliance Web Console and verify that the CPU
temperature has decreased.
8
If CPU temperature does not return to normal, escalate as necessary. The unit
may require replacement.
See “Troubleshooting Hardware Issues” on page 91.
Troubleshooting system status LED issues
The system status LED on the control panel on the front panel of the appliance
signals valuable health information about the unit. This LED is located below and
to the left of the power LED and button. During normal operation the system status
LED is a solid green. The LED changes states when the system detects a problem.
The following table describes the different states the system status LED can assume.
Steps you can take to troubleshoot a change of status are provided after the table.
DescriptionColor/action
Normal operation.Solid green
Degraded performance.Flashes green
Critical or non-recoverable condition.Solid amber
Non-critical condition.Flashes amber
POST (Power On Self Test) is running, or the unit
is off.
Not lit
98Troubleshooting Hardware Issues
Troubleshooting system status LED issues
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