Chapter 1. Servicing (Customer Task); Removing And Replacing A Power Supply Unit (Psu) - IBM Elastic Storage System 5147-102 Service Manual

Chapter 1. Servicing (customer task)

The following topics contain information about service procedures for IBM Elastic Storage System
5147-102 Storage Enclosure.
IBM service support representatives and lab-based services personnel can access service information
through the following link.
Servicing (service personnel only)
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Removing and replacing a Power Supply Unit (PSU)

Refer to the service procedure to remove and replace a faulty Power Supply Unit (PSU) of an IBM Elastic
Storage System 5147-102 Storage Enclosure.
The following steps are the high-level flow of the procedure:
1. Identify the faulty power supply unit.
2. Disconnect the CMA from the CMA bracket on the rear of the enclosure.
3. Follow the appropriate steps to prepare for a service action to release the CMA to access the faulty
PSU.
4. Unplug the power cord from the faulty PSU jack.
5. Remove the faulty PSU.
6. Replace the PSU FRU.
7. Connect the power cord to the PSU FRU.
8. Follow the appropriate steps to prepare for a service action to return the CMA.
9. Run common system health check by using the SSR utility.
Note: If you encounter an error or an unexpected result, contact the next-level support.
No tools are needed to complete this task. Do not remove or loosen any screws.
An IBM Elastic Storage System 5147-102 Storage Enclosure is powered by two 1600W high-efficiency,
hot-swappable N+1 redundant power supply units that are installed in the left side at the rear of
the enclosure as shown in Figure 1. Each PSU has a built-in cooling fan for self-cooling and is load-
shared. The enclosure can be powered by a single PSU indefinitely, but two PSUs are necessary for full
redundancy.
Figure 1. Displaying PSUs
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