IBM 8688 manual Replacing and troubleshooting fans, Replacing fan 1 or

8.Carefully install the processor-board assembly and retention bracket.

9.Carefully install the memory-board assembly.

10.If you have other options to install or remove, do so now. Otherwise, go to “Completing the installation” on page 111.

Replacing and troubleshooting fans

Your xSeries 450 server has two hot-swap 150 mm x 51 mm fans and two hot-swap 150 mm x 38 mm fans. The two 150 mm x 51 mm fans (fan 1 and fan 2) are located toward the front of the server and are used to cool the memory board and processor board. The two 150 mm x 38 mm fans (fan 3 and fan 4) are located just behind the PCI-X board and are used to cool the power supplies, PCI-X slots, and other components.

Each fan has an LED to help you detect a problem. When the fan is operating correctly, this LED is off. If a fan stops working, the Light Path Diagnostics feature will light the system-error LED on the front of the server, indicating that there is a problem, and guide you to the defective fan. When this occurs, first identify the defective fan; then, using the appropriate procedure, remove and replace the fan.

Replacing fan 1 or 2

Fans 1 and 2 are located on the right side of the server. These fans are redundant, meaning that if one fails, the remaining fan will temporarily speed up to properly cool the server components.

Attention: All fans must be replaced within 48 hours of failing.

Complete the following steps to replace fan 1 or 2:

1.Read the safety information beginning on page 197 and “Installation guidelines” on page 77.

2.Place your fingers into the two finger holes on the top of the fan, and squeeze them together; then, lift the fan out of the server.

3.Turn the new fan so that the LED on the top of the fan is to the right side of the server.

Chapter 4. Installing options 107