S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m
8-3
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-06
Chapter 8 Troubleshooting
Troubleshooting a DC Power Supply Unit
For a listing of the power supply unit LEDs and the conditions that they indicate, see
To troubleshoot a power supply problem, follow these steps:
Step 1
Determine which power supply unit has a problem. Check to see which power supply unit does not have
its Input and Output LEDs lit.
Step 2
If one of the required Input LEDs is not lit, perform each of the following checks on the power cord used
for that half of the power supply unit:
•
Make sure that the power cord is securely connected to the AC source.
•
For a 6-kW power supply unit, make sure that the power cord is securely connected to the power
supply unit. Verify that the cable retention device on the power supply unit is securely holding the
power cord.
•
Turn the power supply switch to standby (STBY) and then disconnect the power cord from the AC
source and reconnect with another AC source. After you connect to the AC source, turn the power
switch to ON.
Step 3
If the Output LED is not lit, verify that the power switch is turned to ON.
Step 4
Make sure that the power supply unit is properly seated in the power supply bay by performing the
following steps:
a.
Turn the power switch to STBY.
b.
Loosen the four captive screws on the power supply unit so that they are no longer in contact with
the chassis.
c.
Pull the power supply unit part way out of the chassis and then push it back into the power supply
bay. Make sure that the captive screws on the power supply unit align with their holes in the chassis.
d.
Tighten the four captive screws to 8 in-lb (0.90 N·m).
e.
Turn the power switch to ON.
Step 5
Verify that the power supply unit is functional by replacing it with another power supply (see the
“Replacing an AC Power Supply Unit During Operations” section on page 9-1
) and plugging its power
cords into the same AC source. If the Input and Output LEDs turn green on the replacement power supply
unit, contact Cisco TAC (see the
“Contacting Customer Service” section on page 8-8
) to replace the
defective power supply unit.
If you cannot determine the problem with the power supply or determine which power supply unit has
the problem, contact TAC.
Troubleshooting a DC Power Supply Unit
The following conditions indicate that you need to troubleshoot one or more DC power supply units:
•
The PSU LED on the chassis is amber.
•
The Input LEDs or Output LED on a power supply unit is not green.
•
The Fault LED on a power supply unit is flashing red.
Also, when there are power problems with other modules or the supervisor module PWR MGMT LED
is amber, you need to troubleshoot the power supply units or check the seating of the modules that are
not receiving power.
