IBM 9QX, 9TX, 9TS, 9QS, 900, 4SB, 4SA Cooling fan, Remove the power distribution unit from the cabinet

Note: These screws are held in place by nuts and washers. Hold the nut while you are unscrewing the screw to prevent the nut and washer from falling into the bottom of the cabinet.

4.Remove the power distribution unit from the cabinet.

AC Fuse

Circuit Breaker

115V AC

Power-On

Indicator

Voltage

Selection

Switch

230V AC

Power-On

Indicator

AC Power Input

AC Power Output

Cooling fan

To remove the cooling fan:

1.Power-off the rack.

2.Open the rear door of the rack cabinet.

3.Disconnect the power plug from the rear of the cooling fan.

4.Use a 5/16-inch wrench to remove the eight nuts that secure the cooling fan to the top of the rack cabinet.

5.Remove the cooling fan from the cabinet.

Note: When installing the fan, make sure that the green and yellow ground wire is attached to one of the top fan mounting screws and that the strain-relieving clamp is attached to another. The power cable should be secured by the strain- relieving clamp.

8Hardware Maintenance Manual: IBM PC Server/Enterprise Racks