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Appendix B: Removing and Replacing Appliance Components
Elevated cabinet temperature can be an indication that a cooling fan has
failed. In the ETM 3200 Appliance, the fan unit can be removed and
replaced without turning power off to the chassis.
CAUTION
If a fan fails, it is important that you replace it as soon as
possible, because the power supplies can cause the chassis
temperature to rise quickly. A chassis temperature greater than
70 degrees Celsius could damage components.
To remove/replace the fan unit
1.
Loosen the thumbscrew(s) on the fan unit and remove the fan unit from
the chassis.
2.
Install the new fan unit into the chassis, aligning the connector on the
unit with the connector in the chassis, and tighten the thumbscrew(s),
securing the fan unit to the chassis.
Low-Level Maintenance Mode
Low-level maintenance and troubleshooting tasks, such as recovering from
Card software errors or changing the Span type, can be performed in Fail
Safe mode. Fail Safe mode may be required, for example, if the power goes
off in the middle of downloading a file to the Card and the software
becomes corrupted such that the Card does not boot.
Fail Safe mode does not enable the telecommunications interface; therefore,
you can work in Fail Safe mode as if the Card were powered off. You
cannot make command-line changes to telecommunications parameters
while the Card is in Fail Safe mode. For example, an error message appears
if you type the SPAN INLINE command at the Fail Safe prompt.
Fail Safe mode provides network support; therefore, if Card configuration
parameters are correct and your network is up, Fail Safe mode allows the
Card to connect to the Management Server. This means you can use Fail
Safe Mode from the
ASCII Management Interface
or from a
Console
port connection.
Removing/
Replacing the
Fan Unit
To view cabinet
temperature at any
time, right-click a Card
in the Performance
Manager tree pane,
and then click
Health
& Status
.
