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Removing a PSU module

CAUTION: Removing a power supply unit signicantly disrupts the enclosure’s airflow. Do not

remove the PSU until you have received the replacement module. It is important that all slots are

lled when the enclosure is in operation.

Before removing the PSU, disconnect the power from the PSU by physically removing the power source in

order to ensure your system has warning of imminent power shutdown. A faulty PSU must be replaced by

a fully operational PSU as soon as possible. Ensure that you correctly identify the faulty PSU before

beginning the step procedure.

1. Stop all I/O from hosts to the enclosure. See also Stopping I/O.

Tip: This step is not required for hot-swapping. However, it is required when replacing both PSUs at

once.

2. Use management software to shut down any other system components necessary.

Note: This step is not required for hot-swapping. However, it is required when replacing both PSUs at

once.

3. Disconnect the power cable from the PSU power connector to power off the faulty PSU (it has no

power switch).

Note: Power cables are typically routed to the PSU from the cable management arm (CMA). Verify that

the 180º power cable bends lie flat in the CMA baskets. Ensure that the cable lays flat on the CMA

shelf and through the cable clip assembly. See also Figure 4 on page 10

and step 3 of Routing cables

using the CMA.

4. If replacing a single PSU via hot-swap, proceed to step 6.

5. If replacing both PSUs, verify that alI I/O from hosts to the enclosure were stopped and that the

enclosure is powered off.

6. Verify that the power cord is disconnected.

7. Grasp the PSU handle latch between the thumb and forenger and press the latch tab down to unlock

the handle.

Revolve the handle out and downward to cam the PSU out of the enclosure as shown in Figure 61 on

page 69.

Figure 61. Removing a PSU (1 of 2)

8. Grip the handle and withdraw the PSU, taking care to support the base of the module with both hands

as you remove it from the enclosure as shown in Figure 62 on page 70.

Chapter 7. Module removal and replacement

IBM 106 User Manual

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