Extreme Networks 7720 - Remove and Replace Components; Replacing Internal Power Supplies; Replacing 800 W AC Internal Power Supply

Remove and Replace Components
Replace Internal Power Supplies on page 67
Replace Fan Modules on page 72
Remove the Device from the Rack on page 73
You can replace internal power supplies and fan modules, as needed, while the device
is operating ("hot swapping").
For each device, ensure that all installed power supplies and fan modules have the
same the airow direction: either front-to-back or back-to-front.
Follow the procedures in this section to remove and replace power supplies and fan
modules, and to remove a device from a rack.
Replace Internal Power Supplies
You can replace internal power supplies as needed while the switch is operating ("hot
swapping").
All installed power supplies must have the same airow direction (front-to-back or
back-to-front) and must also match the airow direction of the fan modules.
• If the power supply module has a red tab, the airow is front-to-back.
• If the power supply module has a blue tab, the airow is back-to-front.
To replace one or both AC internal power supplies in the switch, follow the steps in
Replace an 800 W Internal AC Power Supply on page 67.
To replace one or both DC internal power supplies in the switch, follow the steps in
Replace an 800 W Internal DC Power Supply on page 70.
Replace an 800 W Internal AC Power Supply
The switches have two bays for hot-swappable power supplies. In a switch with a
redundant power conguration, you can replace one power supply without powering
Extreme 7720 Hardware Installation Guide 67