Troubleshooting The Fan Trays; Troubleshooting An Ac Power Supply Unit - Cisco Nexus 7000 Series Hardware Installation And Reference Manual

Troubleshooting the Fan Trays

Troubleshooting the Fan Trays

The following conditions indicate that there is a problem with one or more fan tray modules:
• The FAN LED on the chassis is amber.
• The STATUS LED on the fan tray is flashing red.
While the system is running, each fan tray module should be exhausting air and its STATUS LED should be
green, which indicates that all of the fans in that tray are running above the threshold speed.
For a listing of the fan tray LEDs and the conditions that they indicate, see
To troubleshoot a fan tray problem, follow these steps until the problem is resolved:
SUMMARY STEPS
1. Check if the STATUS LED is flashing red or is not lit on each fan tray. If the LED is flashing red, at least
one fan in the tray is running at a slow speed or not running. If the LED is not lit, no power is going to
the fan tray.
2. Check if the power supply units are providing power to the chassis components. The Output LED on each
power supply unit should be lit and green.
3. Make sure that the fan tray is properly seated in the chassis by following these steps:
4. Call Cisco TAC and describe the conditions that you are seeing with the fan tray. See the
Customer Service, on page
DETAILED STEPS
Step 1 Check if the STATUS LED is flashing red or is not lit on each fan tray. If the LED is flashing red, at least one fan in the
tray is running at a slow speed or not running. If the LED is not lit, no power is going to the fan tray.
Step 2 Check if the power supply units are providing power to the chassis components. The Output LED on each power supply
unit should be lit and green.
Step 3 Make sure that the fan tray is properly seated in the chassis by following these steps:
a) Loosen the captive screws on the fan tray until they are no longer in the chassis.
b) Place one hand on the handle for the fan tray and pull the fan tray part way out of the chassis.
c) Push the fan tray back into the chassis until it is fully seated on the midplane and make sure that each captive screw
on the fan tray is aligned with its hole in the chassis.
d) Securely tighten each captive screw (to 8 in-lb [0.90 N·m]) to the chassis.
Step 4 Call Cisco TAC and describe the conditions that you are seeing with the fan tray. See the
on page 136.

Troubleshooting an AC Power Supply Unit

The following conditions indicate that you need to troubleshoot one or more AC power supply units:
• The PSU LED on the chassis is amber.
• The Input 1, Input 2, or Output LED on a power supply unit is not green.
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136.
Troubleshooting
Table D-7 on page D-7 .
Contacting
Contacting Customer Service,