Replacing the complete redundant power supply unit

First remove the power supply slide-in module, as described above.

Loosen the 4 fastening screws on the backside, which are used to fix the power supply unit at the housing.

Loosen both screws inside, which are used to fix the power supply unit inside the housing.

Loosen 2 screws each on the left and the right side, which are used to fix the bar (1) and remove the bar.

Disconnect all cable connections to the mainboard and the drives.

Remove the power supply unit (2) from the housing, by pulling it backwards and lifting it out.

Remove the mounting angles on the left and right side from the power supply unit by loosening 2 screws from the inner side.

In order to install a new power supply unit, proceed in reversed order.