WEG CFW900 - Troubleshooting and Maintenance; Operation of Protections, Faults and Alarms

English
TROUBLESHOOTINGANDMAINTENANCE
6TROUBLESHOOTINGANDMAINTENANCE
Thischapterexplains:
Checkandpreparetheinverterbeforepower-up.
Power-uptheinverterandchecktheresult.
6.1OPERATIONOFPROTECTIONS,FAULTSANDALARMS
Whenaprotectionorfaultactuates,theresultis:
ThePWMpulsesareblocked.
Indicationonthedisplayofthefault/protectiondescriptionandcode.
TheSTATUS“LED”startsflashingred.
Deactivationofthedigitaloutputssetforthefunction“withoutfault”.
Activationofthedigitaloutputssetforthefunction“withfault”.
Writingofessentialdatatotheinverterinternalmemory:
-SpeedreferencesviaHMIandElectronicPotentiometerifthe“Speedbackup”functionisenabled.
-Codeoftheprotection,faultoralarmoccurred.
-Statusofthemotoroverloadfunctionintegrator.
-Statusofthehoursenabled(D3.2)andenergized(D3.1)counter.
Fortheinvertertoreturntonormaloperationrightaftertheactuationofaprotectionorfault,itisnecessary
toresetit,whichcanbedoneasfollows:
PressingtheHMIredkey(manualreset).
AutomaticallybysettingC7.9.1(auto-reset).
Viadigitalinputsetforreset.
Switchingoffthepowersupplyandswitchingitbackon(power-onreset).
Whenanalarmactuates,theresultis:
Indicationonthedisplayofthealarmdescriptionandcode.
TheSTATUS“LED”changestoyellow.
ThePWMpulsesarenotblocked(theinverterisstilloperating).
58|CFW900