Precautions - NEC EXPRESS 320Lb User Manual

Precautions

The following warnings and cautions apply throughout this chapter. Only a
technically qualified person should integrate and configure the system.
The only procedures that can safely be done with the system power on is
removing or installing (hot-swapping) an SCA disk drive/carrier assembly in the
SCSI hot-swap drive cage, or hot swapping a CPU or PCI module. Note that
hot-swapping a PCI module or a CPU module requires that the other module be
operating properly. For any other procedures inside the system, turn off system
power and disconnect the AC power cord (s).
Before doing any procedures in this chapter that require the
server to be off, make sure that your system is powered off
and unplug all AC power cords. Failure to disconnect power
before opening your system can result in personal injury and
equipment damage.
System power on/off. The DC push-button on/off switches
DO NOT turn off the system AC power. To remove power
from system, you must unplug the AC power cords (from
wall outlets or power supply).
Hazardous conditions, power supply. Hazardous voltage,
current, and energy levels are present inside the module
power supplies. There are no user serviceable parts inside
these supplies; servicing should be done by technically
qualified personnel.
Hazardous conditions, devices & cables. Hazardous
electrical conditions may be present on power, telephone,
and communication cables. Turn off the system and
disconnect the power cords, telecommunications systems,
networks, and modems attached to the system before
opening it. Otherwise, personal injury or equipment damage
can result.
!
WARNING
CRU Replacement and Server Upgrades 4-3