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5 – Diagnostics/Troubleshooting
Chassis Diagnostics
59021-08 B 5-11
D
5.2.1
Chassis Over Temperature LED is Illuminated
The chassis Over Temperature LED illuminates to indicate that the switch logic
circuitry has exceeded the failure temperature threshold. The default failure
temperature threshold is 70° C. You can set the failure temperature threshold
using the Set Setup System command. Refer to the ”Set Setup Command” on
page B-48 for more information. If the chassis Over Temperature LED illuminates,
do the following:
1. Enter the Show Setup System command to display the failure temperature
threshold. The default is 70° C. Is the failure temperature threshold to low?
Yes - Use the Set Setup System command to set the failure
temperature threshold to the 70° C.
No - Continue.
2. Inspect the chassis fans. Are the intake openings clear? Are all 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.
3. 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 5-12.