Replacement Procedure Of Fans (Pir/Tswr) - NEC Univerge SV8500 Operation And Maintenance Manual

2.6

Replacement Procedure of FANs (PIR/TSWR)

This section explains how to replace a FAN that is accommodated in PIR or TSWR FAN
can prevent the system from overheating, which might cause malfunction or failure. We
recommend that FAN should replace every five years.
FANs are mounted on FAN tray as shown below. To replace a FAN, the FAN tray must be removed from
the system.
FANC
Do not put your finger to operating FAN box. Before replacing a FAN, make sure that the
CAUTION
FAN blades are completely stopped.
Complete the entire procedure within about 15 minutes; where the temperature is around 77
CAUTION
degrees F.
It is not necessary to turn off the power of PIR/TSWR during FAN replacement.
CAUTION
[START]
STEP 1: Identify a faulty FAN if this replacement is not regular FAN replacement.
Figure 5-6 FANs Accommodated FAN tray
FRONT
CHAPTER 5 Operation Procedure for System with PIR
– 581 –
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
FANs
FAN Tray