Replacing System Fans - Silicon Graphics UV 30 User Manual

5: Chassis Maintenance

Replacing System Fans

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Fan speed is controlled by system temperature via IPMI. If a fan fails, the remaining fan will ramp
up to full speed and the overheat/fan fail LED on the control panel will turn on. Replace any failed
fan at your earliest convenience with the same type and model. The system can continue to run
with a failed fan.
Use the following procedure to replace a failed fan:
1. Remove the top chassis cover while the system is still running to determine which of the
fans has failed.
See "Removing the Chassis Cover" on page
2. Power down the system.
3. Remove the power cord(s) as a safety precaution.
4. Unplug the fan wiring from the serverboard and remove the failed fan.
5. Press the fan release tab to lift the failed fan from the chassis and pull it completely from the
chassis.
See Figure 5-7.
6. Place the new fan into the vacant space in the housing while making sure the arrows on the
top of the fan (indicating air direction) point in the same direction as the arrows on the other
fans.
7. Power up the system and ensure that the fan is working properly before replacing the chassis
cover.
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