12
DEChub ONE
Problem Solving Using LEDs
Table 1 provides information to help isolate problems to the DEChub ONE or the
attached DEChub 900 module.
Table 1:
Problem Solving Using LEDs
Symptom
Probable
Cause
Corrective Action
Power LED on
the attached
network module
is off.
The single-slot
hub has no dc
power input.
Ensure that the ac power cord is properly connected
to the DEChub ONE and wall outlet
.
Check the wall outlet power.
Ensure that the hot-swap switch is properly
engaged and reseat the connectors.
Insufficient dc
power
Verify that the DEChub ONE is a 90-watt version
(Part number DEHUA–cx).
The DEChub ONE
fan runs
continuously.
Reseat the connectors.
If the fan still runs, replace the attached network
module.
The DEChub ONE
fan is not running.
Separate the network module from the DEChub
ONE.
If the fan still does not run, replace the DEChub
ONE.
If the fan begins running, replace the network
module.
Power LED is
flashing on the
attached network
module.
The DEChub ONE
fan runs
intermittently.
Separate the module from the DEChub ONE.
If the fan continues to run intermittently, replace the
DEChub ONE.
If the fan begins to run continuously, troubleshoot or
replace the network module using its
problem-solving recommendations.
The MAU Power
OK LED is off
and the Power
LED on the
attached network
module is on.
The MAU does
not have power.
Ensure that the MAU is properly connected to the
AUI port and that the slide latch is secure.
Refer to the MAU documentation for proper cabling.
If the MAU is operating and properly connected,
replace the DEChub ONE.
The OBM port
LED is off and
the Power LED
on the attached
network module
is on.
Either the OBM
port is not in use
or the OBM LED
is faulty.
Ensure that the network module supports OBM (has
modem capability) and that the OBM port is in use.
If the DEChub ONE is not the problem, troubleshoot
or replace the network module according to the
module’s problem-solving recommendations.
