Nokia 7360 Intelligent Services Access Manager FX Series Hardware Installation Manual page 340

Installing a 7360 ISAM FX-4 shelf
The fan unit can be shipped factory installed in the rack, but can also be ordered as
separate unit for replacement on site.
The fan unit can be hot inserted in the shelf. The fan unit does not have an on/off
switch so removing the fan unit disconnects power provided from the backplane.
Procedure 73
Use the following procedure to install or replace a fan unit.
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Risk of fire and equipment damage or system
Danger —
failure when cooling with the wrong fan unit, when the fans are
off, or when the fan filter is dirty.
When a shelf in a powered system contains the wrong type of
fan unit (for example, a fan unit with four instead of eight fans)
or when fans are failing or out of operation, there is a risk of
active plug-in units overheating. Fan units with dirty fan filters
might no longer assure sufficient air cooling. Plug-in units
might get seriously damaged, even ignite, or cause a system
failure.
Observe the following rules:
•
Before switching on the rack power, make sure the correct
type of fan unit is installed and that the fan unit is equipped
with a clean fan filter.
•
Keep all the fans in operation as long as the system is
active.
•
When replacing a fan unit of an active system (for example,
during maintenance, expansion or upgrade), never keep the
fan area empty for longer than 2 minutes.
•
Make sure the fan filter is clean and replace it, depending
on the amount of dust in the CO, every 3 to 6 months.
See the 7360 ISAM FX Product Information Guide for
information on orderable part numbers.
Hot insertion of the fan unit can sometimes cause
Caution —
service disruption.
To install or replace a fan unit
Verify if the fan unit type is correct for the rack configuration. See Table 14.
Verify the mounting position of the fan unit; see Figure 185.
Remove the fan unit from its shipping packaging and inspect it for damage. If damaged, do
not mount the fan unit but notify the transportation carrier and Nokia immediately.
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ANSI Hardware Installation Manual
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