User`s guide

9-24
Replacement of Defective Power Supply Unit
The power supply unit should be replaced only when it is defective.
IMPORTANT: Do not remove any power supply unit if it operates normally.
NOTE: When the server is equipped with two power supply units and one of them
operates normally, the other defective power supply unit can be replaced while the system
is turned on and operating. In this case, skip step 2 in the procedure below.
1. Check the POWER/FAIL lamps (amber) of the power supply units on the rear face and determine which
module needs to be replaced.
2. Shutdown the system and power off the server.
3. Disconnect the power cord from the failed power supply unit.
4. While pressing down on the lever, grasp the handle and carefully pull the power supply unit out of the bay.
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5. If you are not going to install a replacement power supply unit, you must install the blank cover you removed
in step 2 of installation procedure in the vacant slot.
IMPORTANT: To maintain the cooling effect in the server, install the blank cover in the
vacant slot of the power supply unit bay.
6. Install the power supply unit referring to steps 4 to 6 of the installation and make sure that the power supply
unit is installed securely.