3Com Router 6000 Family
Installation Manual
Chapter 1
Preparing for Installation
3Com Corporation
1-10
III. LED
The following figure illustrates the front panel of AC-input PSU.
Figure 1-9 Front panel of AC-input PSU
The following figure illustrates the front panel of DC-input PSU.
Figure 1-10 Front panel of DC-input PSU.
Table 1-4 PSU LED description
LED Description
ALM (red) ON means the PSU is not present or has failed.
RUN (green) Steady ON means the PSU is operating normally, and OFF
means the PSU has failed.
AC/DC OK (red) PSU input LED (only for the AC-input PSU). Steady ON means
the normal voltage (85 to 264 V) is inputting, and OFF means
the opposite.
1.4.3 FAN module
I. Functions
The 3Com Router 6040 is configured with six fans; the 3Com Router 6080 is configured with
eight fans. These fans are working in pairs and the two fans in each pair are working in
redundancy. When all these fans are working normally, the operating temperature of the
system can be maintained between 0 and 55oC (32 to 131oF). As the failure of a fan does not
affect the operation of other fans, the normal operating temperature of the system can
maintain.
The routing speed of the fans is adjusted by the fan controller on the main control board and
between 50% and 100% depending on the system temperature. When the system
temperature rises above the high-temperature threshold set by the fan controller, the fans are
rotating at full speed (100%); when the system temperature drops below the low-temperature