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8-2
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-18634-01
Chapter 8 Removal and Installation Procedures
Replacing a Power Supply Unit During Operations
Note If a replacement power supply unit is not available and you do not have a blank plate to cover the empty
power supply bay, you should leave the original power supply in the bay until you have the replacement
unit.
For information on removing and installing redundant power supply units, see the following topics:
• Removing a Power Supply Unit During Operations, page 8-2
• Installing a Power Supply Unit During Operations, page 8-2
Removing a Power Supply Unit During Operations
Warning
Hazardous voltage or energy is present on the backplane when the system is operating. Use caution
when servicing.
Statement 1034
To replace a power supply unit while a Cisco Nexus 7000 Series device is operating, follow these steps:
Step 1 Make sure that the power supply units not being replaced have their power switches turned to ON.
Step 2 Turn the power switch on the power supply that you are removing to standby (STBY).
The Input 1 and Input 2 LEDs turn off.
Note If the power supply has only one AC power cord attached to it, only the LED for that input line turns off
(the other one is already off).
Step 3 Unplug the AC power cords from the AC power source. If the power supply has only one AC power
cable, unplug just that cable. Otherwise, unplug both AC power cables.
Step 4 Unscrew the four captive screws on the power supply unit until each screw is no longer in contact with
the chassis.
Step 5 Grasp the power supply handle with one hand and slide the power supply part of the way out of the
chassis. Place your other hand underneath the power supply and slide the power supply completely out
of the chassis.
Step 6 Place the power supply on an antistatic mat or antistatic foam.
Step 7 Either replace the power supply unit or cover the empty power supply bay as follows:
• If you are ready to replace the power supply, see the Installing a Power Supply Unit During
Operations, page 8-2.
• If the power supply bay is to remain empty, install a blank power supply filler plate (Cisco part
number 800-28658-01) over the opening, and secure it with the captive screws.
Installing a Power Supply Unit During Operations
After you remove a power supply, you can replace it with another power supply or replace it with a blank
plate until another power supply is available.
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