3Com 6000 series Getting Started Manual page 17

Indicators and Button
Figure 6 Front panel of the RPU
Table 3 RPU Indicator LEDs and button
LED and Button
RUN (green) RPU
FAN
PWR1
PWR2
ALM (red) RPU
FAN
PWR1
PWR2
RESET
10/100/1000 LINK
Mbps interface (green)
LED
ACT
(yellow)
Description
System operating LED. Blinking means CPU is in normal
operation; steady ON or OFF means CPU has failed.
Steady ON means the FAN module is operating
normally.
Steady ON means the PSU 1 is operating normally, and
steady OFF means the PSU 1 is not present or has failed.
Steady ON means the PSU 2 is operating normally, and
steady OFF means the PSU 2 is not present or has failed.
ON means CPU has received an alarm signal, such as
PSU or FAN alarm (due to over temperature, for
example).
ON means the FAN module is not present or its rotation
is blocked.
ON means the PSU 1 has failed.
ON means the PSU 2 has failed.
The RPU hardware reset button.
OFF means no link is present and ON means a link is
present.
OFF means no data is being transmitted or received on
the interface and blinking means data is being
transmitted or/and received.
The RPU Module 17