Dell PowerEdge R640 EMC PowerEdge R640 Installation and Service Manual - Page 154

Removing a power supply unit

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Figure 107. Installing a power supply unit blank Next steps Follow the procedure listed in After working inside your system on page 72. Removing a power supply unit The procedure for removing AC and DC PSUs is identical. Prerequisites CAUTION: The system needs one power supply unit (PSU) for normal operation. On power-redundant systems, remove and replace only one PSU at a time in a system that is powered on. 1. Follow the safety guidelines listed in Safety instructions on page 71. 2. Disconnect the power cable from the power source and from the PSU you intend to remove, and then remove the cable from the strap on the PSU handle. 3. Unlatch and lift the optional cable management arm if it interferes with the PSU removal. For information about the cable management arm, see the system's rack documentation at https://www.dell.com/ poweredgemanuals. Steps Press the orange release latch and slide the PSU out of the system by using the PSU handle. Figure 108. Removing a power supply unit 154 Installing and removing system components

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Figure 107. Installing a power supply unit blank
Next steps
Follow the procedure listed in
After working inside your system
on page 72.
Removing a power supply unit
The procedure for removing AC and DC PSUs is identical.
Prerequisites
CAUTION:
The system needs one power supply unit (PSU) for normal operation. On power-redundant systems, remove
and replace only one PSU at a time in a system that is powered on.
1.
Follow the safety guidelines listed in
Safety instructions
on page 71.
2.
Disconnect the power cable from the power source and from the PSU you intend to remove, and then remove the cable from the
strap on the PSU handle.
3.
Unlatch and lift the optional cable management arm if it interferes with the PSU removal.
For information about the cable management arm, see the system’s rack documentation at
poweredgemanuals
.
Steps
Press the orange release latch and slide the PSU out of the system by using the PSU handle.
Figure 108. Removing a power supply unit
154
Installing and removing system components