IBM RedBooks SAN24B-5, Installation, Service And User Manual

Page: 62 / 82

1. If the switch has only one power supply and fan assembly, then the switch
must be powered off prior to replacing the assembly. If the switch has two
power supply and fan assemblies installed, verify that the other power supply
and fan assembly (the one not being replaced) has been powered on for at least
four seconds and has a steady green LED.
2. If the switch has two power supply and fan assemblies, skip to step 3 . If the
switch has only one power supply and fan assembly, enter the sysShutDown
command before powering off the assembly to maintain the reliability of the
system.
3. Power off the power supply to be replaced by pressing the AC power switch to
the
O
symbol.
Note:
If the switch has two power supply and fan assemblies, the fans in the
second power supply will automatically switch to high speed to
maintain adequate cooling.
4. Unplug the power cord from the power supply and fan assembly that is being
replaced.
5. Using a Phillips-head screwdriver, unscrew the captive screw
3
.
6. Remove the power supply and fan assembly
2
from the chassis by pulling
the handle out and away from the chassis
1
.
7. Note the part number
4
on the assembly just removed.
Replacing a power supply and fan assembly
Refer to Figure 14 on page 35 for this procedure.
Complete the following steps to replace a combined power supply and fan
assembly in the switch
CAUTION:
The power supply switch must be in the off position (switched to the O symbol)
when inserting it in the chassis. Damage to the switch could result if a live
power supply is installed.
1. Ensure that the new power supply and fan assembly has the same part number
as the power supply and fan assembly being replaced
2.
Orient the new power supply and fan assembly with the captive screw on the
right, as shown in Figure 14 on page 35.
CAUTION:
Do not force the installation. If the FRU does not slide in easily, ensure that
it is correctly oriented before continuing.
3. Gently push the power supply and fan assembly into the chassis until it is
firmly seated.
4. Using the Phillips screwdriver, secure the power supply and fan assembly to
the chassis by tightening in the captive screw
3
.
5. Plug the power cord in to the power supply and fan assembly and power on
the unit by moving the AC power switch to the
| symbol.
6.
Verify that the LED on the new power supply and fan assembly displays a
steady green light while the switch is operating. If the LED is not a steady
green, ensure that the power supply is securely installed and seated properly.
7. Optionally, if using the Command Line Interface (CLI), enter the psShow
command at the command line prompt to display the status. Power supply and
fan assembly status can also be viewed using the Web Tools application.
36
SAN24B-5 Installation, Service, and User Guide