Hot-Swap Power Supply Replacement
Note: This note applies only to systems running the AIX operating system.
If a power supply is being replaced for a redundant failure, after the service repair action is
completed, ask the customer to check the crontab file for any power/cooling warning messages.
When a power or cooling error is encountered, AIX adds an entry to the crontab file to ″wall″ a
warning message every 12 hours, to alert or remind the customer of the problem. Replacing the
faulty part does not clear this crontab entry, so unless the crontab file is edited to remove this
entry, the customer continues to be reminded of the failure despite its having been repaired. Use
the crontab -l command to read the crontab file to determine if an entry exists. Use the crontab -e
command to edit the file.
Documentation for the AIX operating system is available from the IBM Eserver pSeries Information
Center at http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base. Select AIX documentation. The
AIX Documentation CD contains the base set of publications for the operating system, including
system-management and end-user documentation.
To replace a hot-swap power supply, do the following:
1. If you are adding a new power supply to a system that was configured with only one power supply
installed, remove the power-supply filler panel from power supply #2 bay.
2. Grasp the handle located on top of the new power supply. Pivot the handle upward to 90 degrees.
This action puts the handle cams into the correct position to help seat the power supply into its
connector.
3. Carefully insert the power supply into the same power supply bay from which the faulty power supply
was just removed.
4. Lower the power supply handles, carefully pressing the power supply into the connector. The spring
latch located on the underside of each handle will snap into place, indicating that the power supply is
seated correctly and locked into position.
Note: Improper operation of the spring-activated portion of the power supply handles can result in
the following:
v The retractable spring remains compressed - This situation keeps the handle from locking
the power supply in its seated position. To eliminate this problem, lower the handle into the
locked position, and push the spring-activated handle end toward the locking tab. This
action forces the spring latch to mate with the locking tab in the spring-latch receiver hole.
v The locking tab receiver is bent - Before lowering the handle to lock the power supply into
the seated position, ensure that the locking tab located on top of the power supply in the
receiver hole is not bent. Before the spring latch will seat onto the locking tab, the locking
tab, if bent, must be straightened.
506 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide
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