Allied Telesis Removable Power Supply and Fan - Manual (Page 19)

Removable Power Supply and Fan
18
FAN03 The following table describes LEDs on the FAN03 chassis fan module.
Switch The following table describes how LEDs on the switch report operations and
faults with installed PSUs and FOMs.
LED State Description
FAN
STATUS Red The fan has failed.
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.
• The standby switch is off
(PWR01 DC, PWR05 AC, or PWR05 DC).
Off One of the following:
• A FOM is installed and operating at an acceptable
speed. Note that the x900-12XT/S and
SwitchBlade x908 switches do not support FOMs.
• On x900-48FE, x900-48FS, AT-9924T and AT-
9924SP switches there is no PSU or FOM in this
bay.
• On a SwitchBlade x908 switch there is no PSU in
this bay.