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Fan module LEDs
Each fan module has one bi-color LED.
This LED can be illuminated with either a green or amber color. The following
fi
gure and table describes
their locations and meanings.
Item
Name
Condition
Color
Meaning
Solid
Green
The power is on.
1
Status
Off
—
The power is off.
2
Fault
Blinking
Amber
A fault was detected in this module.
Fan modules cool the chassis by circulating air through the enclosure. The rate at which air moves (the
air
fl
ow) determines the amount of cooling. This air
fl
ow is a function of fan speed (rpm). These fans
can operate at multiple speeds. This ensures that when the enclosure temperature changes, the fans
can automatically adjust the air
fl
ow. If one fan operates too slowly or completely shuts off, the other
fan operates at a higher speed. At the same time, the error condition is reported to the user via the
LCD panel on the front of the controller.
newpage pi
26
System components and LEDs