Dell PowerEdge R940 EMC Installation and Service Manual - Page 145

Installing a power supply unit blank, Removing a power supply unit

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Steps If you are installing a second power supply unit, remove the power supply unit blank in the bay by pulling the blank outward. CAUTION: To ensure proper system cooling, the power supply unit blank must be installed in the second power supply unit bay in a non-redundant configuration. Remove the power supply unit blank only if you are installing a second power supply unit. Figure 94. Removing a power supply unit blank Next steps Install the second power supply unit blank. Installing a power supply unit blank Prerequisites 1. Follow the safety guidelines listed in Safety instructions on page 65. NOTE: Install the power supply unit (PSU) blank only in the second PSU bay. Steps Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place. Figure 95. Installing a power supply unit blank 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 65. Installing and removing system components 145

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Steps
If you are installing a second power supply unit, remove the power supply unit blank in the bay by pulling the blank outward.
CAUTION:
To ensure proper system cooling, the power supply unit blank must be installed in the second power supply
unit bay in a non-redundant configuration. Remove the power supply unit blank only if you are installing a second power
supply unit.
Figure 94. Removing a power supply unit blank
Next steps
Install the second power supply unit blank.
Installing a power supply unit blank
Prerequisites
1.
Follow the safety guidelines listed in
Safety instructions
on page 65.
NOTE:
Install the power supply unit (PSU) blank only in the second PSU bay.
Steps
Align the PSU blank with the PSU slot and push it into the PSU slot until it clicks into place.
Figure 95. Installing a power supply unit blank
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 65.
Installing and removing system components
145