WEG CFW900 - Page 68

English
TROUBLESHOOTINGANDMAINTENANCE
Protection/AlarmDescriptionPossiblecauses
A051:
IGBT1VOvertemp.
Alarmofhightemperaturemeasuredinthe
temperaturesensors(NTC)oftheIGBTs.
Note:
-ItcanbedisabledbyC7.5.1.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
A052:
IGBT1WOvertemp.
Alarmofhightemperaturemeasuredinthe
temperaturesensors(NTC)oftheIGBTs.
Note:
-ItcanbedisabledbyC7.5.1.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
F053:
IGBT1UOvertemp.
Faultofovertemperaturemeasuredinthe
temperaturesensors(NTC)oftheIGBTs.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
F054:
IGBT1VOvertemp.
Faultofovertemperaturemeasuredinthe
temperaturesensors(NTC)oftheIGBTs.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
F055:
IGBT1WOvertemp.
Faultofovertemperaturemeasuredinthe
temperaturesensors(NTC)oftheIGBTs.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
A060:
IGBT/DRLJunction
Overtemp.
HightemperatureatthejunctionoftheIGBTsor
diodesalarm.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
F061:
IGBT/DRLJunction
Overtemp.
Overtemperature atthe junction of theIGBTs or
diodesfault.
-Highambienttemperaturearoundtheinverter(>50
◦
C)andhighoutputcurrent.
-Lockedordefectivefan.
-Inverterheatsinktoodirty.
F062:
ThermalImbalance
Powermoduletemperatureunbalancefault.-ThetemperaturedifferencebetweenIGBTmodules
ofthesamephase(U,V,W)isabove15
◦
C.
-ThetemperaturedifferencebetweenIGBTmodules
ofdifferentphases(UandV,UandW,VandW)is
above20
◦
C.
-Thetemperaturedifferencebetweenrectifier
modulesofdifferentphases(RandS,RandT,Sand
T)isabove20
◦
C.
F070:
DCLinkShortCircuit
Faultofshortcircuitattheoutput,DClinkorbraking
resistor.
-Shortcircuitbetweentwomotorphases.
-Shortcircuit ontheconnectingcablesofthe
dynamicbraking.
-Short-circuitedIGBTmodules.
F071:
Overcur.attheOutput
Outputovercurrentfault.-Loadinertiatoohighoraccelerationramptoofast.
-C3.4.1orC3.3.5.1.1settingistoohigh.
F072:
MotorOverload
Motoroverloadfault.
Note:
-Thefaultcanbedisabledbysetting C7.4.1=0or
3.
-C7.4.3,C7.4.4andC7.4.5settingtoolowforthe
motor.
-Loadonthemotorshaftistoohigh.
F074:
GroundFault
Overcurrenttogroundfault.
Note:
-Thefaultcanbedisabledbysetting C7.2.1=0or
3.
-Shortcircuittothegroundatoneormoreoutput
phases.
-Motorcablecapacitancetoohigh,causingcurrent
peaksattheoutput.
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