NEC HX4000, User Manual

Page: 144 / 210

5-55
Upgrades and Options
Swapping Out a Fan Module
This procedure describes swapping out a faulty fan
module from one of the five hot-swap fan bays.
The system has five hot swappable fan modules housing
a total of eight fans (a single fan in two modules and
two fans in three modules). The failed fan module can
be easily removed or replaced without turning power
off. Each fan module has a fan alarm LED and each fan
is redundant in configuration. If one fan fails, its
associated fan changes its rotating speed to high.
Figure 5-27 shows removing fans from the front of the
chassis and Figure 5-28 shows removing fans from the
rear of the chassis.
Note: To order a new fan module contact your sales
representative or dealer.
If the system status LED indicator on the front of the
system unit is amber (abnormal condition), it can be
indicating a faulty fan condition. Each fan module
alarm LED (lite steadily) can then be checked to
pinpoint which fan module is faulty and needs to be
removed. Follow the procedure described in this section
to remove the faulty fan module and swap in a good
one.
Note: Swapping Fan Modules without turning off
power. This is one of the few system procedures that is
safe to do with the system power left on.
1. If the fan module being removed is located in the
front or on the left-hand side of the system unit (as
viewed from the front) continue, otherwise go to
step 4.
2. To remove the front fan module open the right front
exterior door. Go to step 4.
3. To remove one of the left-hand side fan modules
open the fan access door and continue.
4. Loosen the two thumb screws that secure the fan
module to the chassis.