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5 – Diagnostics/Troubleshooting
Chassis Diagnostics
5-10 59021-05 A
5.2.1
Chassis Over Temperature LED is Illuminated
The chassis Over Temperature LED illuminates to indicate that the switch logic
circuitry is overheating. If the chassis Over Temperature LED illuminates, do the
following:
1. Inspect the chassis fans. Are the intake openings clear? Are both fans
operating and producing air flow?
■ Yes - Continue.
■ No - Remove any debris from fan intakes and exhausts if necessary.
Replace any fan that is not operating. Refer to
Section 6 Removal/Replacement. If the condition remains, continue.
2. Consider the ambient air temperature near the switch. Make necessary
corrections. If the condition remains, shut down the switch immediately and
contact your authorized maintenance provider.
5.2.2
Input Power LED Is Extinguished
The Input Power LED illuminates to indicate that the switch logic circuitry is
receiving proper voltages. If the Input Power LED is extinguished, inspect the
Output Power LED. Is the Output Power LED illuminated?
■ Yes - Contact your authorized maintenance provider.
■ No - Refer to ”Output Power LED Is Extinguished” on page 5-11.
5.2.3
Fan Fail LED is Illuminated
The Fan Fail LED illuminates to indicate a malfunction with one or both of the
chassis fans. If the Fan Fail LED illuminates, do the following:
1. Inspect the chassis fan connections. Remove and reinstall the chassis fan.
Refer to Section 6 Removal/Replacement. If the condition remains,
continue.
2. Are both fans operating and producing equal air flow?
■ Yes - Contact your authorized maintenance provider.
■ No - Replace the weaker chassis fan. Refer to
Section 6 Removal/Replacement. If the condition remains, contact
your authorized maintenance provider.
Note: Removing a fan will not illuminate the Fan Fail LED.