Prisma II High Density EDFA Modules Installation Guide

Chapter 5Maintenance and TroubleshootingTroubleshooting Alarm ConditionsEDFA Module Alarm ConditionsIf the red ALARM indicator is illuminated or is blinking, check the display on thefront panel to determine the cause of the alarm.Alarm Function Possible Causes Possible SolutionsLasBiasLasTempModTempInPwrOutPwrLaser Bias CurrentFailedLaser TemperatureHigh or LowModule TemperatureHigh or LowOptical Input powerHigh or LowOptical Output PowerHigh or LowAutomatic power controlcircuit failure.• Laser temperature out ofspecification. Laser couldbe faulty.• Chassis air filter requireschanging.Ambient temperature is toohigh due to:• A failure in the buildingair conditioning system.• Airflow through the rackhas been restricted or cutoff.• Prisma chassis coolingfans are not operatingproperly.• Optical source nottransmitting.• Faulty optical cables orconnections.Laser could be faulty.Contact Cisco Servicesfor assistance.Contact Cisco Servicesfor assistance.Ensure the airflowsystem has not beendamaged or removed.Repair or replace fantray as needed.To troubleshoot thechassis cooling fans,refer to Prisma II ChassisInstallation andOperation Guide, partnumber 713375.Check optical sourceand cables and callconnections.Contact Cisco Servicesfor assistance.86 78-4037880-01 Rev B