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Hot-Swap System Fans
This system supports hot plug and redundant cooling. The DASD and system electronics is cooled with
three system cooling fans. Before performing the following procedures, read "Safety Notices" on page vii.
Hot-Swap System Fan Removal
To remove a hot-swap fan, do the following:
1. Place the system into the service position as described in "Placing the Model 275 into the Service and
Operating Position" on page 26.
2. Remove the service access cover as described in "Service Access Cover Removal" on page 28
3. Locate the cooling fans, as shown in the following illustration.
4. Pull on the locking knob of the failing fan until you feel it unlock.
5. Pull on the locking knob of the failing fan again until you feel the fan pull loose from its connector.
6. Grasp the sheet metal lip of the fan and pull the fan towards the side that contains the locking knob.
7. Lift out the failing fan unit.
Hot-Swap System Fan Replacement
Notes:
1. On systems with Linux installed, you may be required to shut down and run AIX diagnostics to verify
the hot-swap repair.
2. This note applies only to systems running the AIX operating system. If a fan assembly 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
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IntelliStation POWER 9114 Model 275 Installation Guide
3
2
1
1 Model 275
2 Service Access Cover
3 Cooling Fan (Fan #1)
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