COMSPHERE ±48 Vdc Central Office Power Unit
Troubleshooting
If operating in the Basic mode and the power module's Power LED is red, check the DCEs in the carrier. If the LEDs on the DCEs are not lit, try resetting the power module. (Reset the power module by removing the power module and then reinstalling it.) If the Power LED remains red after resetting the power module, you should replace the power module. Do not remove the failed power module until a replacement power module is available. If the power LED is red and the DCEs appear to be working, schedule maintenance for the power module after peak hours at which time you can try resetting the power power module and/or replacing it. If the Fan Alarm LED is yellow and the DCEs in the carrier appear to be working, you may want to schedule maintenance after peak hours.
If operating in the Independent mode and one of the power module's Power LED is red, check the DCEs in the carrier.
•If the LEDs on the DCEs above the power modules are not lit, try resetting the power module. (Reset the power module by removing the power module and then reinstalling it.) If the Power LED remains red after resetting the power module, you should replace the power module. Do not remove the failed power module until a replacement power module is available.
•If the DCEs appear to be working, schedule maintenance for the power module after peak hours at which time you can try resetting the power module and/or replacing it.
Also in Independent mode, if the Fan Alarm LED is yellow and the DCEs in the carrier appear to be working, you may want to schedule maintenance after peak hours.
If operating in the Redundant mode and one of the power module's Power LED is red, try resetting the power module by removing the power module and then reinstalling it. If the Power LED remains red, you should replace the power module.
In addition, if the Fan Alarm LED is yellow, try resetting the power module. If the Fan Alarm LED remains yellow, you should replace the power module.
In all modes of operation, if the Power LED is not lit, check the input power source and external fuses before replacing the power module. If ± 48V is present at the input connector, replace the power module. If ± 48V is not present, check your distribution system.
May 1998 |