WEG CFW900 - Page 72

English
TROUBLESHOOTINGANDMAINTENANCE
Protection/AlarmDescriptionPossiblecauses
A187:
Pow.Fan2Speed
Heatsinkfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
A188:
Pow.Fan3Speed
Heatsinkfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
A189:
Pow.Fan4Speed
Heatsinkfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
A190:
Int.Fan1Speed
Internalfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
A191:
Int.Fan2Speed
Internalfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F228:
SerialCommunication
Timeout
ItindicatesthattheCFW900stoppedreceiving
telegramsontheserialinterfaceforaperiodlonger
thanthesettingprogrammedinC9.3.5.
Note:
-Makesurethemasteralwayssendstelegramstothe
equipmentwithinaperiodshorterthanthesettingin
C9.3.5..
-ItcanbedisabledbysettingC9.3.5=0.0s.
-Checknetworkinstallation,brokencableor
fault/poorcontactontheconnectionswiththe
network,andgrounding.
F233:
NoPowerSupplyonthe
CANInterface
ItactuateswhentheCANinterfaceispoweredand
lackofpowersupplytotheinterfaceisdetected.
Note:
Measureifthereisvoltagewithintheallowedrange
betweenpins1and5oftheCANinterfaceconnector.
-CANinterfacewithoutpowersupplybetweenpins
1and5oftheconnector.
-Powercablesswitchedorreversed.
-PoorcontactontheCANinterfacecableor
connector.
F234:
BusOff
ThebusofferrorintheCANinterfacehasbeen
detected.
Ifthenumberofreceptionortransmissionerrors
detectedbytheCANinterfaceistoohigh,theCAN
controllercanbetakentothebusoffstate,whereit
interruptsthecommunicationanddisablestheCAN
interface.
Inorderthatthecommunicationbereestablished,it
willbenecessarytocyclethepoweroftheproduct,
orremovethepowersupplyfromtheCANinterface
andapplyitagain,sothatthecommunicationbe
reinitiated.
-Verifyifthereisanyshort-circuitbetweentheCAN
circuittransmissioncables.
-Verify ifthe cableshave notbeen changedor
inverted.
-Verifyifallthenetworkdevicesusethesamebaud
rate.
-Verifyifterminationresistorswiththecorrectvalues
wereinstalledonlyattheextremesofthemainbus.
-VerifyiftheCANnetworkinstallationwascarriedout
inpropermanner.
F235:
CANopenOff-line
ItoccursifthestateoftheCANopennodechanges
fromoperationaltopre-operational.
Note:
-Checktheoperationoftheerrorcontrol
mechanisms(Heartbeat/NodeGuarding).
-Themasterisnotsendingtheguarding/heartbeat
telegramsattheprogrammedtime.
-Communicationproblemscausedbylosttelegrams
ortransmissiondelays.
F236:
MasterinIdle
ItactuateswhencommunicatingwiththeDeviceNet
networkmasterinRunmode,andtransitiontoIdle
modeisdetected.
-Settheswitchthatcontrolsthemasteroperation
ofthemastertoRunorthecorrespondingbitonthe
configurationwordofthemastersoftware.Forfurther
explanations,seethedocumentationofthemasterin
use.
CFW900|65