4. Lift the fan out of the server, holding the vertical tabs 1.

5. Replace the fan within 30 seconds (see “Installing a hot-swap fan”).

If you have other optional devices to install or remove, do so now. Otherwise, go to “Completing the installation” on page 100.

Installing a hot-swap fan

The server comes with three replaceable double-fans. For proper cooling, the server requires that all three fans be installed at all times.

Attention: To ensure proper server operation, if a fan fails, replace it immediately. Have a replacement fan ready to install as soon as you remove the failed fan.

The fans use system-board fan connectors 2, 4, and 6 only. Table 11 lists the fan connector on the system board for each double-fan. See “System-board internal connectors” on page 24 for the locations of the fan connectors.

Table 11. Fan connectors on the system board

Fan number

1

2

3

System board fan connector

2

4

6

To install any of the three replaceable fans, complete the following steps:

1.Read the safety information that begins on page vii and “Installation guidelines” on page 33.

2.If you have not done so already, slide the server out of the rack and remove the cover (see “Removing the cover” on page 37).

Attention: To ensure proper system cooling, do not remove the top cover for more than two minutes during this procedure.

3.Orient the new fan over its position in the fan bracket 1 so that the connector on the bottom aligns with the fan connector on the system board.

Chapter 5. Installing optional devices and replacing customer replaceable units 73

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Lenovo 3797 manual Installing a hot-swap fan