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Replace a Power Supply Unit
You can replace a power supply unit (PSU). If the switch is operating with two PSUs, you can replace one
PSU while the other PSU enables the switch to remain powered on and functioning.
To remove one PSU and reinstall another PSU in the same PSU bay:
1.
If the switch functions with a single PSU only, disconnect the power cord from the PSU and let the switch
power down.
If your switch functions with two PSUs, you do not need to power down the switch and can perform a
hot swap.
2.
Remove the PSU from its bay by moving the release latch to the left and pulling the extraction handle.
3.
Insert the other PSU into the bay, and gently push the PSU into the bay until the latch locks.
CAUTION:
4.
Connect the end of the power cord to the power receptacle on the PSU.
5.
Plug the AC power cord into a power source such as a wall socket or power strip.
When you apply power to the PSU, depending on the bay in which you installed the PSU, the Power 1
LED or Power 2 LED on the front panel of the switch lights. If the associated Power LED does not light,
check to see that the power cord is plugged in correctly and that the power source is good.
Fully Managed Stackable Switch M4300-96X
When you insert the PSU, do not use unnecessary force. Doing so can
damage the connectors on the rear of the PSU and on the midplane.
Maintenance and Troubleshooting
36
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Troubleshooting
