Hot Spare Feature; Removing A Redundant Power Supply Unit - Dell PowerEdge R430 Owner's Manual

Hot spare feature

Your system supports the hot spare feature that significantly reduces the power overhead associated with power supply unit
(PSU) redundancy.
When the hot spare feature is enabled, one of the redundant PSUs is switched to the sleep state. The active PSU supports 100
percent of the load, thus operating at higher efficiency. The PSU in the sleep state monitors output voltage of the active PSU. If
the output voltage of the active PSU drops, the PSU in the sleep state returns to an active output state.
If having both PSUs active is more efficient than having one PSU in the sleep state, the active PSU can also activate the
sleeping PSU.
The default PSU settings are as follows:
● If the load on the active PSU is more than 50 percent, then the redundant PSU is switched to the active state.
● If the load on the active PSU falls below 20 percent, 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 about iDRAC settings, see the
Integrated Dell Remote Access Controller User's Guide available at Dell.com/idracmanuals.

Removing a redundant power supply unit

Prerequisites
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that are shipped with your product.
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 section.
2. Disconnect the power cable from the power source.
3. Disconnect the power cable from the PSU and remove the straps that bundle and secure the system cables.
4. Unlatch and lift the optional cable management arm if it interferes with PSU removal. For information about the cable
management arm, see the systems rack documentation at Dell.com/poweredgemanuals.
Steps
Press the release latch and pull the PSU out of the chassis.
Figure 71. Removing a redundant PSU
1. release latch
3. PSU
5. PSU handle
136 Installing and removing system components
2. PSU connector
4. power connector