IBM 9117-MMB, 9179-MHB manual Determine if you are able to perform this procedure concurrently

vIf the error and identify function (amber) LED is flashing, the ac power LED is on solid and the dc power LED is off, the power supply is not operating correctly and has been identified for replacement.

Power supplies, fans, and input power distribution assemblies in a 5802 or 5877 expansion unit

Learn about removing and replacing a power supply, fan, or input power distribution assembly to replace a failing part or as part of another service action in a 5802 or 5877 expansion unit.

The power supply is located in an Offline Converter Assembly (OCA) in the 5802 expansion unit. The expansion unit has two OCAs, with each OCA consisting of a power supply and two fans. To remove or replace a failing fan, you must remove the affected power supply.

Removing a power supply or fan from a 5802 or 5877 expansion unit with the power turned on

Learn how to remove a power supply or power-supply fan from a 5802 or 5877 expansion unit if you need to replace a failing part with the power turned on.

If your system is managed by the Hardware Management Console (HMC), use the HMC to remove a power supply. For instructions, see Removing a part by using the Hardware Management Console.

If your system is managed by the IBM Systems Director Management Console (SDMC), use the SDMC to remove a power supply in the server. For instructions, see Removing a part by using the Systems Director Management Console.

Determine if you are able to perform this procedure concurrently

Attention

Note: Two power supplies must be present in the expansion unit. If one power supply fails, the expansion unit continues to operate. If you are performing this procedure concurrently (with the power turned on), there is a time limit. From the moment the power supply is removed, the exchange of the power supply must be completed in less than 5 minutes. If you cannot replace the power supply in less than 5 minutes, the I/O drawer automatically shuts down.

Read the following steps, but do not perform them yet. Then decide if you are ready (and able) to complete this repair within 5 minutes.

1.Have the replacement power supply or fan ready.

2.Remove the power supply from the expansion unit.

3.Install the fan or fans into the power supply as required for the service procedure being performed.

4.Install the power supply into the enclosure.

Note: If you are replacing a midplane or a power supply, ensure that you only replace one of these parts at a time. If a midplane and both power supplies are replaced at the same time, the enclosure vital product data (VPD), which is present only in these entities, is lost. The enclosure VPD is the identity of the 5802 or 5877 enclosure.

If your system is not managed by the HMC or SDMC, complete the following steps to remove a power supply or fan from an expansion unit or system while the system power is turned on:

1.Perform the prerequisite tasks, as described in Before you begin.

2.Open the front rack door.

3.Identify the failing part, as described in Identifying a failing part.

4.At the front of the expansion unit, identify the power supply that must be replaced. To identify the power supply, observe the state of the amber field-replaceable unit (FRU) fault and identify

Power supplies 9