Getting Started
Hot Swap Power Supplies
5
If an error occurs, access the Operator Control Panel to determine the cause and
locate the failed component. For more information, see
Operator Control Panel
on
page 40. The fans are identified on the rear door panel using a placard for “FAN 1”
and “FAN 2.” For more information on changing a cooling fan, see
Replacing the
Cooling Fans
on page 60.
Hot Swap Power Supplies CAUTION:
Power supplies must be replaced by qualified service personnel only.
Up to three 150 watt hot swap power supplies are incorporated as part of a
fault-tolerant design (N+1 power system). Each power supply unit (PSU) has
current share circuitry which balances the load between the installed power
supplies. In the event of a power supply failure, the load is transferred to the
remaining power supplies without interruption to the CR8e’s normal operation.
If a failure occurs, the Power Supply Status LED will illuminate amber and an
alarm will sound. The user can identify the failed component by accessing the OCP
and viewing the “Hardware Status.” The PSU “DC Good” LED will not be
illuminated on the failed power supply. For more information, see
Replacing a
Power Supply
on page 58.
Power Switch The power switch is located inside the locking front door and controls AC power to
all of the power supplies. This positioning of the switch deters unauthorized users
from powering down the CR8e provided the door is locked. The switch is recessed
to prevent inadvertent activation during service activities.
The switch is labeled with a “
I
” for the ON condition and “
O
” for the OFF condition
and is illuminated when the power is on for easy identification. Depending on the
orientation of the subsystem (i.e., in the rack configuration) the “
I
” label will appear
as a “
—
” and should be interpreted as the ON condition.
Door Lock The front door has an integral lock that also serves as a door handle. In addition,
the door lock provides security to deter unauthorized access to the disk drives and
SAF-TE card. Two keys are provided with the system.
To unlock the door, insert the key and turn it in a counterclockwise direction. To
lock the door, turn the key in a clockwise direction.