Removing A Dc Power Supply Unit - Dell EMC PowerEdge T640 Installation And Service Manual

Figure 34. Installing a power supply unit
Next step
1 Connect the power cable to the PSU, and plug the cable into a power outlet.
CAUTION:
NOTE: When installing, hot swapping, or hot adding a new PSU, wait for 15 seconds for the system to recognize the
PSU and determine its status. The PSU redundancy may not occur until discovery is complete. Wait until the new PSU
is discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that the
PSU is functioning properly.

Removing a DC power supply unit

Prerequisites
WARNING: For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician must perform all connections
to DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself. All electrical wiring
must comply with applicable local or national codes and practices. Damage due to servicing that is not authorized by Dell is not
covered by your warranty. Read and follow all safety instructions that came with the product.
CAUTION: The system needs one 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
2 Disconnect the power wires from the power source and the connector from the PSU you intend to remove.
3 Disconnect the safety ground wire.
Step
Press the release latch and slide the PSU out of the system by using the PSU handle.
Next step
Install the DC PSU.
86 Installing and removing system components
When connecting the power cable to the PSU, secure the cable to the PSU with the strap.
Safety instructions.