Replacing a dc power supply and fan unit

CAUTION:

Disconnect the power cord before replacing the power supply and fan unit.

Complete the following steps to replace the power supply and fan units that you removed before the installation:

1.Slide one power supply and fan unit into the storage subsystem. Be sure to replace the power supply and fan units so that the lever on each power supply and fan unit opens toward the interior of the storage subsystem, as shown in Figure 28. Do not force fit. The power supply and fan unit is designed to prevent it from being inserted into the chassis incorrectly.

Attention: Be sure that the lever is pulled straight out as you slide the power supply and fan unit into the storage subsystem, as shown in Figure 28. The left and right power supply and fan units are seated in the DS4700 Express chassis in opposite orientations. If you cannot fully insert the power supply and fan unit into the power supply and fan unit bay, flip it 180° and reinsert it.

Lever

Figure 28. Replacing a power supply and fan unit

2.As you slide the power supply and fan unit into the empty slot, make sure the guide pins on the side of the power supply and fan unit fit into the notches along the sides of the power supply and fan unit bay. After the guide pins fit into the notches and power supply and fan unit fits snugly into the slot, push the lever upward or downward 90° depending on whether the power supply fan is inserted in the left or right bay to fully latch it into place. Then gently push the front of the power supply and fan unit to ensure that it is fully seated.

3.Repeat step 1 and step 2 to replace the second power supply and fan unit.