Allied Telesis AT-PWR05-50 990-002013-50 Manual De Usuario

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.

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 70ºC (158º F).

• A FOM is installed in the switch and a fan has failed. 

The x900-12XT/S and the SwitchBlade x908 
switches do not support FOMs.

• The bay is empty. Applies to AT-8948, AT-9924Ts, 

x900-24XT, x900-24XT-N, x900-24XS, and 
AT-10408XP switches which require a FOM when 
only one PSU is installed.

• Dual PSUs are installed, but the PSU is not 

receiving power.

Off

A FOM is installed and operating at an acceptable 
speed. For AT-9924T, x900-48FE, x900-48FE-N, x900-
48FS, and SwitchBlade x908 switches, a blanking plate 
is installed.