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4-8
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 4 Troubleshooting Hardware
Troubleshooting Fan Issues
Power reserved for Supervisor(s)[-] 440.16 W
Power reserved for Fan Module(s)[-] 126.00 W
Power currently used by Modules[-] 430.08 W
If you are unable to resolve the problem or if you determine that either a power supply or backplane
connector is faulty, contact your customer support representative.
Troubleshooting Fan Issues
This section describes fan failure problems and includes the following topics:
• Fan Is Not Spinning, page 4-8
• Fan Is Spinning; Fan LED is Red, page 4-8
Fan Is Not Spinning
Symptom Fan is not spinning.
Fan Is Spinning; Fan LED is Red
Symptom Fan is spinning, but fan LED is red.
Table 4-5 Fan Is Not Spinning
Symptom Possible Cause Solution
Fan is not spinning. Fan is not correctly seated in the chassis. Loosen the captive screws, remove the fan module and
reinstall it to ensure that the fan module is seated properly.
Tighten all captive screws, and then restart the system.
Power supply is not operational. Troubleshoot the power supplies. See the “Troubleshooting
Power Supply Issues” section on page 4-3.
Table 4-6 Fan Is Spinning; Fan LED is Red
Symptom Possible Cause Solution
Fan is spinning but
fan LED is red.
Fan is not correctly seated in the chassis. Loosen the captive screws, remove the fan module and
reinstall it to ensure that the fan module is seated properly.
Tighten all captive screws, and then restart the system.
Fan module has failed. Troubleshoot the Fan Module. See the “Troubleshooting a
Fan Failure Using the CLI” section on page 4-10.
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