User's Guide

Upgrading Your Server 9-19
Replacement of Defected Power Supply
The power supply should be replaced only when it is defected.
IMPORTANT: Do not remove any power supply if it operates
normally.
NOTE: When the server (or disk expansion unit) is equipped with two
power supplies and one of the power supplies operates normally (with
the power lamp of the power supply being on), the other defected power
supply can be replaced under the system operation (or in the power-on
status). In this case, skip step 2 in the procedure below.
1. Check the Fail lamps (amber) of the power supplies on the rear face and determine which
module needs to be replaced. (If a power supply is defected, the Fail lamp is lit amber.)
2. Shut down the system and press the POWER switch to turn off the power.
3. Disconnect the power cord from the failed power supply.
4. While pressing down on the locking tab, grasp the handle and carefully pull the power
supply out of the power supply bay.
IMPORTANT: To avoid damaging the power supply unit, do not tilt
or twist the unit as you pull it from the power supply bay. The module
disengaging from its connector causes the initial resistance you will feel.
Use even, steady force to remove the unit.
2
1
5. If you are not going to install a replacement power supply unit, you must install a blank
cover you removed in step 2 of installation procedure to vacant slot.
IMPORTANT: To maintain the cooling effect in the server, install the
blank cover in the vacant slot of the power supply bay.
6. Install the power supply referring to steps 3 to 6 of the installation and make sure that the
power supply is installed securely.