Installing A Hot-Swap Fan - IBM System x3650 M3 4255 Service Manual

Installing a hot-swap fan

For proper cooling, the server requires that all three fans be installed at all times.
Attention:
Have a replacement fan ready to install as soon as you remove the failed fan.
See "System-board internal connectors" on page 15 for the locations of the fan
connectors.
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IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
To ensure proper server operation, if a fan fails, replace it immediately.