3

Troubleshooting

Refer to Table 3-1for 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

Verify the use of a good AC cable with a good

Power Hub, but main power LED is “off.”

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

Verify that all fan openings are clear.

not working.

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

Verify that you are using a standard UTP Cat. 5,

the powered devices does not work.

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.

Mid-Span Power Hub 24-Port User’s Guide 3-1

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Enterasys Networks 24-Port manual Troubleshooting Checklist Problem Recommended Action