Procedure
1. Holding the PSU with one hand underneath it and the other hand holding the handle, turn the PSU so
that its release latch is on the right side, and align the back end (the end with the electrical
connections) to the open power supply slot. Carefully slide the PSU all the way into the slot until it
clicks into place.
Note: If the PSU does not fit into the slot opening, turn the unit over and try again.
2. Test the installation by trying to pull the PSU out of the slot without using the release latch.
If the PSU does not move out of place, it is secured in the slot. If the PSU moves, carefully press it all
the way into the slot until it clicks in place.
3. Attach the power cable to the electrical outlet on the front of the PSU.
4. Make sure that the other end of the power cable is attached to the appropriate power feed for the PSU.
If the power feed has a switch, slide it to the On position.
Note: Depending on the outlet receptacle on your power distribution unit, you might need the optional
jumper cable to connect the switch to your outlet receptacle.
5. Verify that the PSU is operational by making sure that the PSU LEDs are both green. For information on
what the PSU LEDs indicate, see the Switch LEDs section.
Removing Power Supply Units
About this task
You can remove one faulty PSU, while the other one provides enough power to operate the switch.
Procedure
1. Holding the plug for the power cable, pull the plug out from the power receptacle on the PSU, and wait
until both the PSU LEDs are off.
Note: If you need to remove an Anderson's Saf-D-Grid power cable connector from a high voltage PSU,
press the tab at the top of the connector and pull the connector out of the PSU.
2. Grasp the PSU handle while pressing the release latch towards the handle.
3. Place your other hand under the PSU to support it while you slide it out of the chassis.
CAUTION: Do not touch the electrical connectors on the back side of the unit and prevent
anything else from coming into contact with and damaging the connectors.
Installing and Removing Fan Modules
This section provides instructions for installing and removing the fan modules for the IBM SAN48C-6
switch.
You can replace one of the four fan modules even when the switch is operating so long as you perform the
replacement within one minute of removing the old fan module. If you cannot perform the replacement
within one minute, leave the original fan module in the chassis to maintain the designed airflow until you
have the replacement fan module on hand and can perform the replacement.
CAUTION: If you are replacing a module during operation, be sure that the replacement fan
module has the correct direction of airflow, which means that it has the same airflow direction as
the other modules in the chassis. Also, be sure that the airflow direction takes in air from a cold
aisle and sends it out to a hot aisle. Otherwise, the switch can overheat and shut down.
If you are changing the airflow direction of all the modules in the chassis, you must shut down the
switch before replacing all the fan and power supply modules with modules using the other airflow
direction. During operation, all the modules must have the same direction of airflow.
28 IBM Storage Networking: IBM Storage Networking SAN48C-6 32 Gbps 48-Port Fibre Channel Switch
Installation, Service, and User Guide
