Precautions - NEC EXPRESS5800/180Ra-7 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 drive/carrier assembly in one of
the SCSI hot-swap drive cages, hot-swapping a failed power supply, or hot
swapping a hot plug fan box or PCI board. For any other procedures inside the
system, turn off system power and disconnect the AC power cord (s).
Before doing the procedures in this chapter, 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 switch (a
convex button) on the front panel DOES 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 power
supply. There are no user serviceable parts inside it;
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
Upgrading Your System 4-3