Compaq H9A11 manual Removing and Replacing the Power Distribu tion Unit

Installation

2.5.4 Removing and Replacing the Power Distribu tion Unit

_______________________ WARNING __________________________

There can be one or more PDUs per cabinet. Ensure that all systems installed in the cabinet are turned off as described in the system documentation before performing the following procedure.

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To remove a power distribution unit, refer to Figure 2-7 and proceed as follows:

Removal

1.If the cabinet contains an operating system, turn off the system as described in the system documentation.

2.Remove the two Phillips-head screws that secure the rear lift-off door to the two brackets at the top rear of the cabinet, and lift the door off of the cabinet (refer to Section 2.5.1).

3.Set the Main Power switch ôon all power distribution units to the off (O) position.

4.Disconnect the power distribution units from the ac power source.

5.Remove the bottom front filler panel (refer to Section 2.5.2). This provides access to the ac outlets on the power distribution units.

6.Note and record the power cord connections to the outlets öat the rear of the failed power distribution unit. Then unplug the power cords from that power distribution unit.

7.At the rear of the cabinet, remove the four (4) 10-32 truss-head screws õthat secure the power distribution unit ùto the rear rails (via the four (4) 10-32 clip nuts ú.

8.Pull out the power distribution unit ùand remove it from the cabinet.

Replacement

To replace a power distribution unit, reverse the removal procedure, steps 2 through 8, then follow the power-on procedure in the system documentation.

2–16H9A11 Cabinet Installation/Owner's Guide