Allied Telesis x900 Series Switch - Handbuch (Seite 13)

Installation and Safety Guide
13
Checking LEDs
Table 1 below describes how LEDs on the switch report faults and operational
activities.
Table 2 on page 14 describes how LEDs on power supply units and fan-only
modules report faults and operational activities.
LEDs for Ethernet ports and Small Form Factor Pluggable (SFP) ports are
described in the Hardware Reference.
Table 1: System LEDs
LED State Description
PSU 1 Green PSU 1 is installed and supplying power to the switch.
The voltage output is within specification.
Red PSU 1 is installed in the switch and has exceeded its
recommended temperature threshold of 75º C
(167º F), or the fan has failed.
A FOM is installed in the switch and has failed.
The bay is empty. Applies to AT-8948, AT-9924T/4SP,
and AT-9924Ts switches since they require a FOM
when only one PSU is installed.
Off A FOM is installed and operating at an acceptable speed.
For AT-9924T and x900-48FE switches, a blanking panel
is installed.
PSU 2 Green PSU 2 is installed and supplying power to the switch.
The voltage output is within specification.
Red PSU 2 is installed in the switch and has exceeded its
recommended temperature threshold of 75º C
(167º F), or the fan has failed.
A FOM is installed in the switch and has failed.
The bay is empty. Applies to AT-8948, AT-9924T/4SP,
and AT-9924Ts switches since they require a FOM
when only one PSU is installed.
Off A FOM is installed and operating at an acceptable speed.
For x900-48FE switches, a blanking panel is installed.