Troubleshooting The Fan; Troubleshooting The Cards - 3Com Switch 7700 Installation Manual

S Y S T E M
T R O U B L E S H O O T I N G
FAIL

9.3. Troubleshooting the Fan

If the fan LED OK is off, check that:
Table 31 Fan LEDs on the Fabric
Indicator
OK
FAIL

9.4. Troubleshooting the Cards

The Fabric and I/O module LEDs show the states of the FABRIC and the 6 I/O modules, as described in Table 32.
Table 32 Card LEDs on the Fabric
Indicator
RUN
ALM
54
Off — the power fails to work or has not been installed yet.
On — the power fails to work.
Off means that the power works normally or has not been installed yet.
The fan has been installed in the correct position for normal communication with the
backplane.
Every heat dissipation fan is working normally.
There is nothing blocking the vent of the chassis.
The blank filler plates are furnished on the chassis where there is no module inserted.
On — the fan works normally.
Off — the fan fails to work or has not been installed yet.
On — the fan fails to work.
Off — the fan works normally or has not been installed yet.
If the LED ALM of the module remains green or green flashing, it indicates there is
something wrong with the module.
During the process of resetting the module, the ALM LED remains on. After normal
booting, it is off.
When resetting the module, if the ALM LED remains off, the module may not be
connected to the power source. Check that the module has been properly installed in
the correct position.
Green/Off — the module fails to work or has not been inserted.
Green Flashing — the module works normally.
Off — the module works normally or has not been inserted.
Remaining on — the module failed to work.
State Description
State Description