IBM System Storage Subsystem DS5020 - Manual (Page 68)

3. Place the controller on a level surface.
4. Repeat step 1 through step 3 for the second controller.
Removing an ac power supply and fan unit
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
1
2
CAUTION:
Disconnect the power cord before removing the power supply and fan unit.
Complete the following steps to remove a power supply and fan unit:
1. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal) to
release the power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
2. Slowly pull the lever away from the chassis to remove the power supply and fan
unit, as shown in Figure 17 on page 39.
Note: The lever rotates upward or downward 90°, depending on whether the
power supply and fan unit you are removing is in the left or right power
supply and fan unit bay.
Lever
Figure 16. Removing and replacing a controller
38 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide