Dell C7004/C150, Установка и обслуживание

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48 | Removing and Replacing Components
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Removing and Replacing Power Supply Units
WARNING: Do not remove a panel blank unless you are ready to install a power supply into that slot. After
removing a power supply, immediately place a panel blank in the empty slot. Blanks are required to control
airflow and electromagnetic interference.
A power supply failure is recognized by a red power LED, a lit RPM alarm LED, and, if configured, an
SNMP trap. If you are operating your C7004/C150 chassis with a redundant power supply, you can
install, remove, or replace a power supply without affecting system operation. If you are operating your
C7004/C150 system with only one power supply, you must completely power off the system to replace a
power supply.
NOTE: If a power supply fails, the entire unit must be replaced. There are no field serviceable parts inside the
unit.
To remove and replace a power supply:
3
Insert the new fan tray into the chassis. Guide the tray firmly into the slot until the fan tray is flush with the
chassis.
4
Secure the fan tray into place by tightening the screws at the top and bottom of the fan tray using a #2 Phillips
screwdriver.
Step Task
1
If you are removing one of only two installed power supplies, power down the chassis (see Powering Up on
page 41 ).
If you are removing a redundant power supply, toggle the switch on the power supply to the OFF (left) position.
2
If applicable, disconnect the power cable from the AC power source and the front of the power supply.
3
If using a DC PEM, turn the remote power source (the circuit breaker panel) and the over-current switch (located on
the PEM front panel) to the
OFF position.
4
Pull the power supply out of the slot using the handle.
5
If you are not replacing the power supply, insert a panel blank.
6
Toggle the switch on the replacement power supply to the OFF position.
7
Slide the new power supply into the power supply slot. See Figure 7-1 for the correct orientation.
8
If applicable, plug the power cord into the power receptacle in the face of the power supply. See Figure 7-2 for the
location of the receptacle and plug the AC power cord into an AC power outlet
9
If using a DC PEM, secure it in place by tightening the retaining latch on each module so that the arrow points
down.
10
On the DC PEM, secure the chassis ground connection and connect the -48 VDC and Return cables from each PEM
to the remote power sources. See
Figure 8-3 for correct connections.
11
Toggle the switch on the power supply to the ON (right) position.
12
Power up the chassis if necessary.
Step Task