3com 3C16894 4-slot Chassis User Manual

C

HAPTER

 5: T

ROUBLESHOOTING

Table 50 describes power LEDs on the Fabric. (continued)

If the fan OK LED is off, check that: 

■

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 blanking plates are installed on the chassis where no module is inserted.

Table 51 describes fan LEDs on the Fabric.

The Fabric and I/O module LEDs show the status of the FABRIC and the I/O 
modules, as described in Table 52. 

■

If the ALM LED 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. Verify that the module has been properly 
installed in the correct position.

Table 50   Power LEDs on the Fabric

OK

On — The power is working normally.

 

Off — The power has failed or has not been installed.

FAIL

On — The power has failed.

 

Off — The power is working normally or has not been installed.

Table 51   Fan LEDs on the Fabric

OK

On — The fan is working normally.

 

Off — The fan has failed or has not been installed.

FAIL

On — The fan has failed.

 

Off — The fan is working or has not been installed

Table 52   Module LEDs on the Fabric

RUN

Green/Off — The module has failed or has not been inserted.

 

Green flashing — The module is working normally.

ALM

Off — The module is working or has not been inserted.

 

Green or green flashing— The module has failed.