Cisco ASR 9000 Series Installation Manual page 233

Chapter 4 Troubleshooting the Installation
If the Pwr OK indicator is on and the Fault indicator is off on each power module, it indicates that
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the fan trays are receiving –48 VDC:
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If the Fault indicator is on, the power supply is faulty. Replace the power supply.
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If the Temp and Fault indicators are on, an overtemperature condition exists:
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If a fan tray is still not functioning, there could be a problem with the fan tray controller card
or an undetected problem in the fan tray cable. Replace the fan tray.
If the new fan tray does not function, contact a Cisco customer service representative for
assistance.
Verify that the power supply fan is operating properly.
If the fan is not operating, replace the power supply.
Contact your Cisco representative if replacing the power supply does not fix the problem.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
Troubleshooting the Cooling Subsystem
4-31