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MAP 0500: Fan and CTP Card Failure Analysis
3-71
Diagnostics
• One single-phase connection for each power supply.
• Input power between 120 and 230 Vac.
• Input current between 2 and 4 amps.
• Input frequency between 47 and 63 Hz.
Is facility power within specifications?
YES NO
↓ Ask the customer to correct the facility power problem. When
facility power is corrected, verify switch temperature cools to
within the operational limit.
11
Inspect the fans. Do one or more fans appear to rotate at insufficient
angular velocity (failure pending)?
NO YES
↓ Remove and replace the affected fan.(RRP: Cooling Fan
FRU on page 5-6). After fan replacement, verify switch
temperature cools to within the operational limit.
A power supply problem is indicated. Go to MAP 0100: Power
Distribution Analysis on page 3-28.
12
An SBAR module is not recognized by switch firmware because the
firmware version is not supported or the SBAR module failed. Advise
the customer of the problem and determine the correct firmware
version to download from the EFC Server.
Download the firmware (Download a Firmware Version to a Switch on
page 4-53). Perform the data collection procedure after the
download.
Continue.
13
Did the firmware download solve the problem?
NO YES
↓ The switch appears operational.
14
The SBAR module on the CTP card failed. Contact the next level of
support.