Allied Telesis x900 Series Switch and SwitchBlade x908 - Manual (Page 20)

Installation and Safety Guide
19
The following LEDs report operations and faults on x900 Series and
SwitchBlade x908 switches:
■ “System LEDs” on page 19
■ “Stacking LEDs” on page 21
■ “PWR01 LEDs” on page 21
■ “PWR02 LEDs” on page 21
■ “PWR05 LEDs” on page 22
LEDs for Ethernet ports and Small Form Factor Pluggable (SFP) ports are
described in the Hardware Reference.
System
LEDs
The following table describes how LEDs on the switch report operations and
faults.
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.
A FOM is installed in the switch and a fan has
failed. 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 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.
POWER Green The PSU is operating and supplying power to the
switch. The voltage output is within specification.
Valid for the x900-12XT/S switch.