Nokia 7360 Intelligent Services Access Manager FX Series Hardware Installation Manual page 165

ANSI Hardware Installation Manual
The fan unit can be hot inserted into the shelf. The fan unit does not have an on/off
switch so removing the fan unit disconnects power provided from the backplane.
Procedure 31
Use the following procedure to replace a fan unit.
1
2
3
Issue: 09
Risk of fire and equipment damage or system
Danger —
failure when cooling with a faulty fan unit, when the fans are off,
or when the fan filter is dirty.
When a shelf in a powered system contains a faulty fan unit, 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 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 interruption.
To replace a fan unit
Unpack the fan unit and visually inspect it for physical damage.
If anything is missing or damaged, notify the transportation carrier and Nokia immediately.
Photograph all the damaged equipment. Keep all the inspection and packing documents as
a reference.
Warning — Possibility of equipment damage.
Do not install damaged equipment, as it can adversely affect other
equipment.
Put on the antistatic wrist strap and connect it to a grounding point.
3HH-12893-AAAA-TCZZA
Installing a 7360 ISAM FX-12 shelf
DRAFT
165