WEG CFW900 - Page 71

English
TROUBLESHOOTINGANDMAINTENANCE
Protection/AlarmDescriptionPossiblecauses
F157:
IGBTundertemperature
Faultofundertemperaturemeasuredbythesensors
intheIGBTs,rectifier,powerand/orcontrolbelow-30
◦
C.
-Ambienttemperaturearoundtheinverter
≤
-30
◦
C.
F158:
Corruptedsettings
Invertersettingsareinvalid.
Note:
-Restorethesettingsfromabackup.
-Parametersettingsfilecannotberestoredcorrectly.
F160:
STO90Fault
ItindicatestotheuserthatSTO90isinafaultstate.- Incorrect installationof thesafety inputscircuit
(STO1andSTO2).
-Actuationtimebetweenthesafetyinputs(STO1and
STO2)greaterthan1s.
-Incorrectsettingofthesafetyinputtype(drycontact
orOSSD)onDIPswitchesS1.
-DIPswitchesS2activatedinastateotherthanthe
STOstate.
-Incorrectprogrammingofthesafetyfunctionor
programmingtimeout(2min).
-DamageintheelectroniccircuitofSTO90.
F161:
STO90Off-line
ItindicatestotheuserthatCFW900centralcontrol
haslostcommunicationwithSTO90.
-PoorcontactbetweenSTO90andCFW900central
control.
- Damageintheelectronic circuit ofSTO90or
CFW900centralcontrol.
F171:
Pow.Fan1Speed
Heatsinkfan1speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F172:
Pow.Fan2Speed
Heatsinkfan2speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F173:
Pow.Fan3Speed
Heatsinkfan3speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F174:
Pow.Fan4Speed
Heatsinkfan4speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F175:
Int.Fan1Speed
Internalfan1speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
F176:
Int.Fan2Speed
Internalfan2speedfault.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
A181:
Clockwithinvalidvalue
Clockwithwrongtime.-SetthedateandtimeinC11.1.2.
-Batterylow,defectiveornotinstalled.
F185:
Pre-chargeProtection
Itindicatespre-chargecontactorfault.-Defectivepre-chargecontactor.
-Commandfuseopen.
-PhaselossatinputL1/RorL2/S.
A186:
Pow.Fan1Speed
Heatsinkfanlowspeedalarm.-Dirtonthefanbladesandrollingbearings.
-Defectivefan.
-Defectivefanpowersupplyconnection.
64|CFW900