Removable Power Supply and Fan
14
Switch
The following table describes how LEDs on the switch report operations and
faults with installed PSUs and FOMs.
LED
State
Description
PSU 1
and
PSU 2
Green
The PSU is installed and supplying power to the switch.
The voltage output is within specification.
Red
One of the following:
The PSU is installed in the switch, and a fan has
failed or the PSU has exceeded its recommended
temperature threshold of 70º C (158º F).
A FOM is installed in the switch and a fan has failed.
Note that the x900-12XT/S and SwitchBlade x908
switches do not support FOMs.
The bay is empty. Applies to AT-8948, AT-9924Ts,
x900-24XT, x900-24XT-N, and x900-24XS
switches which require a FOM when only one PSU
is installed.
Dual PSUs are installed, but the PSU is not
receiving power.
Off
One of the following:
A FOM is installed and operating at an acceptable
speed. Applies to AT-9924T, x900-48FE, and
x900-48FS.
On SwitchBlade x908 switches there is no power
supply in this bay.
