IBM System Cluster 1350, Installation And Service

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Chapter 21. Power Distribution Unit removal and replacement
Contents
Removal and replacement
The PDU provides AC power within the cabinet. The PDUs are mounted sideways
beside the regular rack space. Two types of PDUs are used:
v
Rack PDUs
v
Front-end PDUs
Rack PDUs provide power to components within a cabinet, while front-end PDUs
provide the connection to the external power source and distribute the power
among the rack PDUs. A rack PDU can also be directly connected to the external
power source to eliminate the need for the front-end PDU. Up to four front-end
PDUs can be placed in each cabinet and up to twelve rack PDUs.
To remove the Power Distribution Units take the following steps:
1. Shut down all devices.
2. Remove the side cover on the side of the rack that the failing PDU is located
on.
3. Power down each rack PDU using the breaker switch.
4.
Unplug each rack PDU from the front-end PDU or customer supplied power
source.
5. If present, unplug the front-end PDU from the customer supplied power
source.
6. Remove the four screws holding the plate the PDUs are mounted on.
7. Turn the plate over to access the screws that hold the rack PDUs and the
front-end PDU (if present) on the plate.
8. Remove the screws holding the failing component to the plate.
9. Replace the failing component (front-end PDU or rack PDU) and reverse the
steps shown above to re-install the PDUs.
© Copyright IBM Corp. 2003
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