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aTCA-80606PA
6.3 Fan Tray Signals
The Fan Tray provides signals for:
•
Fuse monitoring
•
Status of the Hot Swap Controller
•
Fan Speed
•
Temperature
These signals are controlled by the IPM Controller devices on the Fan Tray PCB. The Shelf
Manager has access to these signals via IPMB.
6.4 Fan Tray Indicators
The front panel includes a green Fan Tray OK LED, a red Fan Tray Fault 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 5: LEDs on Fan Tray front panel
Color
Description
Status
Condition
Green
Fan Tray OK LED
Off
No Power to the Fan Tray
Solid green
Normal Operation
Red
Fan Tray Fault LED
Solid red
Attention Status (error condition)
Blue
Hot Swap LED
Off
No Power to the Fan Tray, or
not OK to extract the Fan Tray
Short blink
Preparing for extraction
Solid blue
Ready to remove