Schneider ATV71 Drives

Schneider ATV71 Drives Fault Codes:

Fault Code and MeaningCause and Remedy
AI2F

[AI2 input]
Cause: Non-conforming signal on analog input AI2.



Remedy:

  • Check the wiring of analog input AI2 and the value of the signal.
AnF

[Load slipping]
Cause: The encoder speed feedback does not match the reference.



Remedy:

  • Check the motor, gain and stability parameters.

  • Add a braking resistor.

  • Check the size of the motor/drive/load.

  • Check the encoder’s mechanical coupling and its wiring.

  • If the “torque control” function is used, see “Note” on page 188.
bOF

[DBR overload]
Cause: The braking resistor is under excessive stress.



Remedy:

  • Check the size of the resistor and wait for it to cool down.

  • Check the [DB Resistor Power] (brP) and [DB Resistor value] (brU) parameters.
brF

[Brake feedback]
Cause: The brake feedback contact does not match the brake logic control. The brake does not stop the motor quickly enough (detected by measuring the speed on the “Pulse input” input).



Remedy:

  • Check the feedback circuit and the brake logic control circuit.

  • Check the mechanical state of the brake.

  • Check the brake linings.
bUF

[DB unit sh. Circuit]
Cause: Short-circuit output from braking unit or Braking unit not connected.



Remedy:

  • Check the wiring of the braking unit and the resistor.

  • Check the braking resistor.

  • The monitoring of this fault must be disabled by the [Brake res. fault Mgt.] (bUb) parameter if there is no resistor or braking unit connected to the drive.
CrF1

[Precharge]
Cause: Charging relay control fault or charging resistor damaged.



Remedy:

  • Turn the drive off and then back on again.

  • Check the internal connections.

  • Inspect/repair the drive.
CrF2

[Thyr. soft charge]
Cause: DC bus charging fault (thyristors).



Remedy:

  • Turn the drive off and then back on again.

  • Inspect/repair the drive.
dCF

[Differential current Fault]
Cause: Current difference between power block A and B (Specific ATV71 models only).



Remedy:

  • Check thyristor with [TEST THYRISTORS].

  • Check IGBT with [TRANSISTOR TEST].

  • Check current transformer.
ECF

[Encoder coupling]
Cause: Break in encoder’s mechanical coupling.



Remedy:

  • Check the encoder’s mechanical coupling.
EEF1

[Control Eeprom]
Cause: Internal memory fault, control card.



Remedy:

  • Check the environment (electromagnetic compatibility).

  • Turn off, reset, return to factory settings.

  • Inspect/repair the drive.
EEF2

[Power Eeprom]
Cause: Internal memory fault, power card.



Remedy:

  • Inspect/repair the drive.
EnF

[Encoder]
Cause: Encoder feedback fault.



Remedy:

  • Check [Number of pulses] (PGI) and [Encoder type] (EnS).

  • Check that the encoder’s mechanical and electrical operation, its power supply and connections are all correct.

  • If necessary, reverse the direction of rotation of the motor ([Output Ph rotation] (PHr) parameter) or the encoder signals.
FCF1

[Out. contact. stuck]
Cause: The output contactor remains closed although the opening conditions have been met.



Remedy:

  • Check the contactor and its wiring.

  • Check the feedback circuit.
HdF

[IGBT desaturation]
Cause: Short-circuit or grounding at the drive output.



Remedy:

  • Check the cables connecting the drive to the motor, and the motor insulation.

  • Perform the diagnostic tests via the [1.10 DIAGNOSTICS] menu.
ILF

[Internal com. link]
Cause: Communication fault between option card and drive.



Remedy:

  • Check the environment (electromagnetic compatibility).

  • Check the connections.

  • Check that no more than 2 option cards (max. permitted) have been installed on the drive.

  • Replace the option card.

  • Inspect/repair the drive.
InF1

[Rating error]
Cause: The power card is different from the card stored.



Remedy:

  • Check the reference of the power card.
InF2

[Incompatible PB]
Cause: The power card is incompatible with the control card.



Remedy:

  • Check the reference of the power card and its compatibility.
InF3

[Internal serial link]
Cause: Communication fault between the internal cards.



Remedy:

  • Check the internal connections.

  • Inspect/repair the drive.
InF4

[Internal-mftg zone]
Cause: Internal data inconsistent.



Remedy:

  • Recalibrate the drive (performed by Schneider Electric Product Support).
InF6

[Internal – fault option]
Cause: The option installed in the drive is not recognized.



Remedy:

  • Check the reference and compatibility of the option.
InF7

[Internal-hard init.]
Cause: Initialization of the drive is incomplete.



Remedy:

  • Turn off and reset.
InF8

[Internal-ctrl supply]
Cause: The control power supply is incorrect.



Remedy:

  • Check the control section power supply.
InF9

[Internal- I measure]
Cause: The current measurements are incorrect.



Remedy:

  • Replace the current sensors or the power card.

  • Inspect/repair the drive.
InFA

[Internal-mains circuit]
Cause: The input stage is not operating correctly.



Remedy:

  • Perform the diagnostic tests via the [1.10 DIAGNOSTICS] menu.

  • Inspect/repair the drive.
InFb

[Internal- th. sensor]
Cause: The drive temperature sensor is not operating correctly or the braking unit’s temperature sensor is not operating correctly.



Remedy:

  • Replace the drive temperature sensor.

  • Inspect/repair the drive.

  • Replace the braking unit’s temperature sensor.

  • Inspect/repair the braking unit.

  • The monitoring of this fault must be disabled by the [Brake res. fault Mgt.] (bUb) parameter if there is no braking unit connected to the drive.
InFC

[Internal-time meas.]
Cause: Fault on the electronic time measurement component.



Remedy:

  • Inspect/repair the drive.
InFE

[Internal- CPU]
Cause: Internal microprocessor fault.



Remedy:

  • Turn off and reset. Inspect/repair the drive.
OCF

[Overcurrent]
Cause: Parameters in the [SETTINGS] (SEt-) and [1.4 MOTOR CONTROL] (drC-) menus are not correct. Inertia or load too high. Mechanical locking.



Remedy:

  • Check the parameters.

  • Check the size of the motor/drive/load.

  • Check the state of the mechanism.
PrF

[Power removal]
Cause: Fault with the drive’s “Power removal” safety function.



Remedy:

  • Inspect/repair the drive.
SCF1

[Motor short circuit]
Cause: Short-circuit or grounding at the drive output. Significant earth leakage current at the drive output if several motors are connected in parallel.



Remedy:

  • Check the cables connecting the drive to the motor, and the motor insulation.

  • Perform the diagnostic tests via the [1.10 DIAGNOSTICS] menu.

  • Reduce the switching frequency.

  • Connect chokes in series with the motor.

  • Check the adjustment of speed loop and brake.

  • Increase the [Time to restart] (ttr) parameter.
SCF2

[Impedant sh. circuit]
Cause: Short-circuit or grounding at the drive output (Impedant).



Remedy:

  • Check the cables connecting the drive to the motor, and the motor insulation.

  • Perform the diagnostic tests via the [1.10 DIAGNOSTICS] menu.

  • Reduce the switching frequency.

  • Connect chokes in series with the motor.
SCF3

[Ground short circuit]
Cause: Ground short circuit or significant earth leakage.



Remedy:

  • Check the cables connecting the drive to the motor, and the motor insulation.

  • Perform the diagnostic tests via the [1.10 DIAGNOSTICS] menu.

  • Reduce the switching frequency.

  • Connect chokes in series with the motor.
SOF

[Overspeed]
Cause: Instability or driving load too high.



Remedy:

  • Check the motor, gain and stability parameters.

  • Add a braking resistor.

  • Check the size of the motor/drive/load.

  • Check the parameters settings for the [FREQUENCY METER] (FqF-) function.
SPF

[Speed fdback loss]
Cause:


  • Encoder feedback signal missing

  • Signal on “Pulse input” missing, if the input is used for speed measurement




Remedy:


  • Check the wiring between the encoder and the drive

  • Check the encoder

  • Check the wiring of the input cable and the detector used
tnF

[Auto-tuning]
Cause:


  • Special motor or motor whose power is not suitable for the drive

  • Motor not connected to the drive




Remedy:


  • Check that the motor/drive are compatible

  • Check that the motor is present during auto-tuning

  • If an output contactor is being used, close it during auto-tuning
APF

[Application fault]
Cause:

Controller Inside card fault



Remedy:

Please refer to the card documentation
bLF

[Brake control]
Cause:


  • Brake release current not reached

  • Brake engage frequency threshold [Brake engage freq] (bEn) only regulated when brake logic control is assigned




Remedy:


  • Check the drive/motor connection

  • Check the motor windings

  • Check the [Brake release I FW] (Ibr) and [Brake release I Rev] (Ird) settings

  • Apply the recommended settings for [Brake engage freq] (bEn)
CnF

[Com. network]
Cause:

Communication fault on communication card



Remedy:


  • Check the environment (electromagnetic compatibility)

  • Check the wiring

  • Check the time-out

  • Replace the option card

  • Inspect/repair the drive
COF

[CANopen com.]
Cause:

Interruption in communication on the CANopen bus



Remedy:


  • Check the communication bus

  • Check the time-out

  • Refer to the CANopen User’s Manual
EPF1

[External flt-LI/Bit]
Cause:

Fault triggered by an external device, depending on user



Remedy:

Check the device which caused the fault, and reset
EPF2

[External fault com.]
Cause:

Fault triggered by a communication network



Remedy:

Check for the cause of the fault and reset
FCF2

[Out. contact. open.]
Cause:

The output contactor remains open although the closing conditions have been met



Remedy:


  • Check the contactor and its wiring

  • Check the feedback circuit
LCF

[input contactor]
Cause:

The drive is not turned on even though [Mains V. time out] (LCt) has elapsed.



Remedy:


  • Check the contactor and its wiring

  • Check the time-out

  • Check the line/contactor/drive connection
LFF2 / LFF3 / LFF4

[AI2/AI3/AI4 4-20mA loss]
Cause:

Loss of the 4-20 mA reference on analog input AI2, AI3 or AI4



Remedy:

Check the connection on the analog inputs
ObF

[Overbraking]
Cause:

Braking too sudden or driving load



Remedy:


  • Increase the deceleration time

  • Install a braking resistor if necessary

  • Activate the [Dec ramp adapt.] (brA) function if it is compatible with the application
OHF

[Drive overheat]
Cause:


  • Power board -PCB over temperature

  • Braking unit over temperature

  • Phase module over temperature

  • Rectifier over temperature




Remedy:

Check the motor load, the drive ventilation and the ambient temperature. Wait for the drive to cool down before restarting
OLF

[Motor overload]
Cause:

Triggered by excessive motor current



Remedy:

Check the setting of the motor thermal protection, check the motor load. Wait for the drive to cool down before restarting.
OPF1

[1 output phase loss]
Cause:

Loss of one phase at drive output



Remedy:

Check the connections from the drive to the motor
OPF2
[3 motor phase loss]
Cause:

  • Motor not connected or motor power too low.

  • Output contactor open.

  • Instantaneous instability in the motor current.




Remedy:

  • Check the connections from the drive to the motor.

  • If an output contactor is being used, parameterize [Output Phase Loss] (OPL) = [Output cut] (OAC).

  • Test on a low power motor or without a motor: In factory settings mode, motor phase loss detection is active. To check the drive in a test environment without a motor, deactivate detection [Output Phase Loss] (OPL) = [No] (nO).

  • Check and optimize parameters: [IR compensation] (UFr), [Rated motor volt.] (UnS), and [Rated mot. current] (nCr) and perform [Auto-tuning] (tUn).
OSF
[Mains overvoltage]
Cause:

  • Line voltage too high.

  • Disturbed mains supply.




Remedy:

  • Check the line voltage.
OtF1
[PTC1 overheat]
Cause: Overheating of the PTC1 probes detected.


Remedy:

  • Check the motor load and motor size.

  • Check the motor ventilation.

  • Wait for the motor to cool before restarting.

  • Check the type and state of the PTC probes.
OtF2
[PTC2 overheat]
Cause: Overheating of the PTC2 probes detected.


Remedy:

  • Check the motor load and motor size.

  • Check the motor ventilation.

  • Wait for the motor to cool before restarting.

  • Check the type and state of the PTC probes.
OtFL
[LI6=PTC overheat]
Cause: Overheating of PTC probes detected on input LI6.


Remedy:

  • Check the motor load and motor size.

  • Check the motor ventilation.

  • Wait for the motor to cool before restarting.

  • Check the type and state of the PTC probes.
PtF1
[PTC1 probe]
Cause: PTC1 probes open or short-circuited.


Remedy:

  • Check the PTC probes and the wiring between them and the motor/drive.
PtF2
[PTC2 probe]
Cause: PTC2 probes open or short-circuited.


Remedy:

  • Check the PTC probes and the wiring between them and the motor/drive.
PtFL
[LI6=PTC probe]
Cause: PTC probes on input LI6 open or short-circuited.


Remedy:

  • Check the PTC probes and the wiring between them and the motor/drive.
SCF4
[IGBT short circuit]
Cause: Power component fault.


Remedy:

  • Perform a test via the [1.10 DIAGNOSTICS] menu.

  • Inspect/repair the drive.
SCF5
[Motor short circuit]
Cause: Short-circuit at drive output.


Remedy:

  • Check the cables connecting the drive to the motor, and the motor’s insulation.

  • Perform tests via the [1.10 DIAGNOSTICS] menu.

  • Inspect/repair the drive.
SLF1
[Modbus com.]
Cause: Interruption in communication on the Modbus bus.


Remedy:

  • Check the communication bus.

  • Check the time-out.

  • Refer to the Modbus User’s Manual.
SLF2
[PC com.]
Cause: Fault communicating with PC-Software.


Remedy:

  • Check the PC-Software connecting cable.

  • Check the time-out.
SLF3
[HMI com.]
Cause: Fault communicating with the graphic display terminal.


Remedy:

  • Check the terminal connection.

  • Check the time-out.
SrF
[TORQUE TIME OUT FLT]
Cause: The time-out of the torque control function is attained.


Remedy:

  • Check the function’s settings.

  • Check the state of the mechanism.
SSF
[Torque/current lim]
Cause: Switch to torque limitation.


Remedy:

  • Check if there are any mechanical problems.

  • Check the parameters of [TORQUE LIMITATION] (tLA-) and [TORQUE OR I LIM. DETECT.] (tId-).
tJF
[IGBT overheat]
Cause: Drive overheated.


Remedy:

  • Check the size of the load/motor/drive.

  • Reduce the switching frequency.

  • Wait for the motor to cool before restarting.
CFF
[Incorrect config.]
Cause:

  • Option card changed or removed.

  • Control card replaced by a control card configured on a drive with a different rating.

  • The current configuration is inconsistent.




Remedy:

  • Check that there are no card errors.

  • In the event of the option card being changed/removed deliberately, see manual remarks.

  • Return to factory settings or retrieve the backup configuration, if it is valid.
CFI
[Invalid config.]
Cause:

  • Invalid configuration: The configuration loaded in the drive via the bus or communication network is inconsistent.

  • [Max frequency] (tFr) has been set at a value higher than 599Hz.




Remedy:

  • Check the configuration loaded previously.

  • Load a compatible configuration.

  • Set [Max frequency] (tFr) at a value lower or equal to 599 Hz.
dLF
[Dynamic load fault]
Cause: Abnormal load variation.


Remedy:

  • Check that the load is not blocked by an obstacle.

  • Removal of a run command causes a reset.
HCF
[Cards pairing]
Cause: The [CARDS PAIRING] (PPI-) function has been configured and a drive card has been changed.


Remedy:

  • In the event of a card error, reinsert the original card.

  • Confirm the configuration by entering the [Pairing password] (PPI) if the card was changed deliberately.
PHF
[Input phase loss]
Cause:

  • Drive incorrectly supplied or a fuse blown.

  • Failure of one phase.

  • 3-phase ATV71 used on a single-phase line supply.

  • Unbalanced load.

  • This protection only operates with the drive on load.




Remedy:

  • Check the power connection and the fuses.

  • Use a 3-phase line supply.

  • Disable the fault by [Input phase loss] (IPL) = [No] (nO).
USF
[Undervoltage]
Cause:

  • Line supply too low.

  • Transient voltage dip.

  • This protection only operates with the drive running in motor mode.




Remedy:

  • Check the voltage and the parameters of [UNDERVOLTAGE MGT] (USb-).