●
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
.
Removing a power supply unit
Prerequisites
CAUTION:
The system requires two power supply unit (PSU) for normal operation. On power-redundant
systems, remove and replace only one/two PSU at a time in a system that is powered on.
1. Follow the safety guidelines listed in the
on page 23.
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.
Figure 103. Removing a power supply unit
Next steps
Installing a power supply unit
Prerequisites
1. Follow the safety guidelines listed in the
on page 23.
2. For systems that support redundant PSU, ensure that both the PSUs are of the same type and have the same maximum
output power.
NOTE:
The maximum output power (shown in watts) is listed on the PSU label.
3.
.
96
Installing and removing system components
