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CAUTION:
This product is equipped with a 3-wire (two conductors and ground) power cable and
plug. Use this power cable with a properly grounded electrical outlet to avoid electrical
shock. (C018)
Note: See "Power cables" on page 226 for information about the power cords that are available for
the rack.
3. Follow the power-on procedures for the switches and directors installed in the rack. See the specific
installation and service guides for each installed switch.
4. Close the front door of the rack.
Service procedures
The service procedures described in this chapter are for the cabinet and associated hardware only. Service
procedures for the individual products mounted in the cabinet are described in their respective
installation and service guides. This chapter contains the following sections:
v "Director power-off procedure"
v "Removing and replacing the iPDUs"
v "Removing and replacing the front or rear rack door" on page 220
v "Relocating the rack" on page 221
Attention: Refer to "Safety and environmental notices" on page xiii before performing any service
procedures in this chapter.
Attention: To ensure proper air circulation and cooling, filler panels (see "Blank fillers" on page 224)
must be installed in all blank spaces in the cabinet. If you remove any devices, fill the blank spaces with
filler panels.
Director power-off procedure
Use the following procedure to power-off a director before attempting to remove or replace any rack
components. For more specific instructions to power off a particular device, refer to the installation and
service guide for that particular product.
Attention: Removing power to a mounted director or other device has an adverse effect on the
customer's systems and networks if they are not properly prepared. Inform the customer before you
power off any product.
1. Open the rear door of the rack. Check the power cabling from the device that is attached to the iPDU
that you are servicing. Most devices have dual power cords, which are plugged into iPDUs with
independent ac sources.
2. Before you power off the director, make sure that the customer has removed, dismounted, or taken
the devices off line from their systems.
3. Turn off the ac power switches (circuit breakers) of the devices connected to the iPDU you are
servicing.
4. Unplug the power cord from the customer's ac power outlet(s).
5. Unplug all power cords from the iPDU you are servicing.
Removing and replacing the iPDUs
For all racks with serial numbers ending in an alphabetic character, iPDUs for the directors and other
devices are mounted only in the side cutouts. See "Side-mounted iPDUs" on page 219 for instructions on
removing and replacing side-mounted iPDUs.
218
SAN256B-6 Installation, Service, and User Guide
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