Allied Telesis AT-9900s Installation And Safety Manual page 13

Table 1: System LEDs (Continued)
LED State
PSU 2 Green
Red
Off
Fault Red
1 Flash
6 Flashes
Slow
flashing at
startup
Rapid
flashing at
startup
CF Green
flashing
SD Off
Description
PSU 2 is installed and supplying power to the switch.
The voltage output is within specification.
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.
A FOM is installed and operating at an acceptable
speed.
The switch or management software is
malfunctioning.
One or more heatsink fans has failed or is operating
below the recommended speed.
The switch's temperature has exceeded the
recommended threshold. After flashing six times,
the LED stops briefly, then repeats the sequence.
The SDRAM (DIMM) has not been detected.
The SDRAM (DIMM) is not compatible with the
switch.
The CompactFlash memory card is active and
should not be ejected. The card can be safely ejected
when the LED remains off.
Secure Digital memory card. Not supported by 3.0.1
software.
Installation and Safety Guide
13