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Mid-Span Power Hub 24-Port User’s Guide 3-1
3
Troubleshooting
Refer to Table 3-1 for a checklist of problems and recommended actions to resolve the
problem. If additional support is needed, refer to “ Getting Help ” on page x.
Table 3-1 Troubleshooting Checklist
Problem Recommended Action
Unit is plugged into the Enterasys Mid-Span
Power Hub, but main power LED is “off.” Verify the use of a good AC cable with a good
ground connection.
Verify that the AC is “hot” and that voltage is
between 100 VAC to 264 VAC (50 Hz to 60 Hz).
For the 24-port Mid-Span Power Hub, if the
internal fan is working, there may be an internal
circuitry fault or internal voltage that is out of
specification. If the fan is not working, there may
be an internal power supply fault.
Unit is plugged in and running, but the fans are
not working. Verify that all fan openings are clear.
Verify that the metal case is not damaged.
Verify that there are no loose parts inside the
Mid-Span Power Hub.
If needed, check and replace fuse at the inlet
plug 10 A rated fuse.
The Mid-Span Power Hub operates but one of
the powered devices does not work. Verify that you are using a standard UTP Cat. 5,
5e, or 6 cable, including all eight wires (four
pairs). Try to move the same load into a
different port on the same hub. If it works, there
is probably a faulty port or bad RJ45 port
connection. If possible, try to connect the load
device into a different hub. Try using a different
Ethernet cable; if it works, there is probably a
faulty connection over the long cable, or a bad
RJ45 connection.