Owners Manual

● If the load on the active PSU falls below 20 percent of PSU rated power wattage, then the redundant PSU is switched to
the sleep state.
You can configure the hot spare feature by using the iDRAC settings. For more information, see the iDRAC User’s Guide
available at www.dell.com/poweredgemanuals.
Removing a power supply unit blank
Prerequisites
Follow the safety guidelines listed in the Safety instructions on page 26.
Steps
Pull the blank out of the system.
CAUTION: To ensure proper system cooling, the PSU blank must be installed in the second PSU bay in a
non-redundant configuration. Remove the PSU blank only if you are installing a second PSU.
Next steps
1. Replace the PSU blank or PSU.
Installing a power supply unit blank
Prerequisites
1. Follow the safety guidelines listed in the Safety instructions on page 26.
NOTE: Install the power supply unit (PSU) blank only in the second PSU bay.
2. Remove the PSU.
Steps
Align the PSU blank with the PSU bay and push it into the PSU bay until it clicks into place.
Removing a power supply unit
Prerequisites
CAUTION:
The system requires 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 the Safety instructions on page 26.
2. Disconnect the power cable from the power outlet and from the PSU you intend to remove.
3. Remove the cable from the strap on the PSU handle.
4. Unlatch and lift or remove the optional cable management accessory if it interferes with the PSU removal.
For information about the cable management when the PSU is removed or installed while the system is in a rack, see the
system’s cable management arm documentation at https://www.dell.com/poweredgemanuals.
Steps
Press the release latch, and holding the PSU handle slide the PSU out of the PSU bay.
Installing and removing system components
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