16
aTCA-80302PA/PD
Figure 7: Fan Control curves
6.2 Fan Tray Indicators
The front panel includes a green and red status LED and a blue hot-swap LED.
The Hot-Swap push button indicates to the Shelf Managers that the Fan Tray is
about to be removed. Its use is optional, but it is provided so that service personnel
can be trained to look for a blue LED to be illuminated on any active component
before removing it from the system. Once the operator pushes the Hot-Swap button,
the Shelf Manager is informed of the pending extraction. When the Shelf Manager
feels it is “safe“ to remove the Fan Tray, the blue Hot-Swap LED illuminates solid.
Table 4: LEDs on Fan Tray front panel
Color
Description
Status
Condition
Green
OK LED
Off
No Power to the Fan Tray
Solid green
Normal Operation
Red
Solid red
Attention Status (error condition)
Blue
Hot Swap LED
Off
No Power to the Fan Tray or not
OK to extract Fan Tray
Short blink
Preparing for extraction
Solid blue
Ready to remove
