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12. Securely fasten the power supply modules in the power subsystem bay. See "Installing a
Power Supply Module" on page 60.
13. Install the top cover. See "Installing the Top Cover" on page 51.
14. Install the front cover. See "Installing the Front Cover" on page 51.
Cooling System
CAUTIONS
Cooling and air flow: Once you remove the fan board assembly or
individual fan from the system, ensure that it is replaced within two minutes.
If this timeframe is not possible, insert the original unit. When a
replacement unit is available, repeat the replacement procedure. Vacant
spaces alter airflow patterns in the server system and may cause
environmental conditions to exceed the environmental limits of the server.
The fan board assembly is held in place by two screws, one on each side of the chassis. The fan
board assembly holds up to six individual fans. The top of each fan has two finger holds, one on
each side of the fan. A connector at the bottom of each fan fits into a connector in the fan board
assembly. Before removing the fan board assembly, make sure that the replacement assembly is
ready.
Removing a Fan Board Assembly
1. Observe the safety and ESD precautions at the beginning of this chapter.
2. Turn off the system by using the power on/off switch on the front panel AND unplug all
AC power cords.
3. Remove the front cover. See "Removing the Front Cover" on page 50.
4. Remove the top cover. See "Removing the Top Cover" on page 51.
5. Remove all individual fans from the assembly. See "Removing Individual Fans" on page 65.
6. Remove the two screws that secure the board assembly to the chassis. Set the screws aside.
You need them later in this procedure. One of the screws is noted by "A" in Figure 30.
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SRKA4/ISP4400 Server System Product Guide
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