Schneider ATV303 Drive Fault Codes

Complete reference list of Schneider Altivar 303 (ATV303) fault codes. Learn to interpret LED errors like OCF, SCF, and tH1 etc.

Schneider ATV303 Fault Codes Reference Table

Schneider ATV303 Fault Codes Reference Table

Schneider ATV303 Fault Codes Reference Table

Fault Code and Meaning Cause and Remedy
F001
Precharge		 Cause: Charging relay control fault or charging resistor damaged.

Remedy:
  • Turn the drive off and then back on again.
  • Check the connections.
  • Check the stability of the main supply.
  • Contact local Schneider Electric representative.
F002
Unknown drive rating		 Cause: Power card and stored card versions different.

Remedy:
  • Contact local Schneider Electric representative.
F003
Unknown or incompatible power board		 Cause: The power card is incompatible with the control card.

Remedy:
  • Contact local Schneider Electric representative.
F004
Internal serial link fault		 Cause: Communication interruption between the internal cards.

Remedy:
  • Contact local Schneider Electric representative.
F005
Invalid industrialization zone		 Cause: Internal data inconsistent.

Remedy:
  • Contact local Schneider Electric representative.
F006
Current measurement circuit		 Cause: Current measurement is not correct due to hardware circuit fault.

Remedy:
  • Contact local Schneider Electric representative.
----
Problem with application firmware		 Cause: Invalid application firmware update using the Multi-Loader tool.

Remedy:
  • Re-download application firmware.
F007
Internal thermal sensor detected fault		 Cause:
  • The drive temperature sensor is not operating correctly.
  • The drive is in short circuit or open.

Remedy:
  • Contact local Schneider Electric representative.
F008
Internal CPU		 Cause: Internal microprocessor fault.

Remedy:
  • Turn the drive off and then back on again.
  • Contact local Schneider Electric representative.
F010
Overcurrent		 Cause:
  • Parameters in the Motor control menu (300-) 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.
  • Connect line motor chokes.
  • Reduce the Switching frequency range (315).
  • Check the ground connection of drive, motor cable, and motor insulation.
F018
Motor short-circuit		 Cause: Short-circuit or grounding at the drive output.

Remedy:
  • Check the cables connecting the drive to the motor and the motor insulation.
  • Connect line motor chokes.
F019
Ground short-circuit		 Cause:
  • Ground fault while in run state.
  • Motor switching while in run state.
  • Significant current leakage to ground while several motors are connected in parallel.

Remedy:
  • Check the cables connecting the drive to the motor and the motor insulation.
  • Connect line motor chokes.
F020
IGBT short circuit		 Cause: Internal power component short circuit detected at power on.

Remedy:
  • Contact local Schneider Electric representative.
F025
Overspeed		 Cause:
  • Instability.
  • Overspeed associated with the inertia of the application.

Remedy:
  • Check the motor.
  • If overspeed is 10% more than Top frequency (308), adjust this parameter if necessary.
  • Add a braking resistor.
  • Check the size of the motor/drive/load.
  • Check parameters of the speed loop (gain and stability).
F028
Autotuning fault		 Cause:
  • Motor not connected to the drive.
  • Motor phase loss.
  • Special motor.
  • Motor is rotating (being driven by the load, for example).

Remedy:
  • Check that the motor/drive are compatible.
  • Check that the motor is present during autotuning.
  • If an output contactor is being used downstream, close it during auto-tuning.
  • Check that the motor is completely stopped.
F033
AI1 current loss		 Cause: Detected if:
  • Analog input AI1 is configured as current.
  • AI1 current scaling parameter of 0% (204.1) is greater than 3 mA.
  • Analog input current is lower than 2 mA.

Remedy:
  • Check the terminal connection.
F009
Overbraking		 Cause: Sudden braking or load inertia too high.

Remedy:
  • Increase the deceleration time.
  • Install a module unit with a braking resistor if necessary.
  • Check the main supply voltage to ensure it is under the maximum acceptable (20% over maximum main supply during run status).
F011
Drive overheat		 Cause: Drive temperature too high.

Remedy:
  • Check the motor load, the drive ventilation, and the ambient temperature.
  • Wait for the drive to cool down before restarting.
  • See Mounting and temperature conditions in manual.
F012
Process overload		 Cause: Process overload.

Remedy:
  • Check that drive parameters and application processes are compatible.
F013
Motor overload		 Cause: Triggered by excessive motor current.

Remedy:
  • Check configuration of motor thermal protection and motor load.
F014
1 Output phase loss		 Cause: Loss of one phase on drive output.

Remedy:
  • Check the connections from the drive to the motor.
  • If using a downstream contactor, make sure the connection, cable, and contactor are right.
F015
3 Output phases loss		 Cause:
  • Motor not connected.
  • Motor power too low, below 6% of the rated drive current.
  • Output contactor open.
  • Transient instability in the motor current.

Remedy:
  • Check the connections from the drive to the motor.
  • Test on a low power motor or without a motor. In factory settings mode, motor phase loss detection is active (Output Phase loss detection 605 = 01).
  • To check the drive in a test or maintenance environment, without having to use a motor with the same rating as the drive, deactivate motor phase loss detection (605 = 00).
  • Check and optimize IR compensation (310), Rated motor voltage (304/305), and perform Auto-tuning (318).
F016
Main overvoltage		 Cause:
  • Line voltage too high: At drive power on, supply is 10% over maximum acceptable voltage level.
  • At power with no run command, 20% over maximal line supply.
  • Disturbed mains supply.

Remedy:
  • Turn Off the Drive. Check and adjust the line voltage.
  • After line come back to nominal voltage (within tolerance) do power On.
  • If intermittent F016 code appears, set R1 assignment (205) to 01 and it can be connected to upstream protection to avoid overvoltage in the drive.
F017
Input phase loss		 Cause:
  • Drive incorrectly supplied or a fuse blown.
  • Failure of one phase.
  • 3-phase ATV310 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 reporting of this fault type by setting Input Phase loss detection (606) to 00.
F021
Load short circuit		 Cause:
  • Short-circuit at drive output.
  • Short circuit detection at the run command or DC injection command if parameter IGBT Test (608) is set to 01.

Remedy:
  • Check the cables connecting the drive to the motor and the condition of motor insulation.
F022
Modbus interruption		 Cause:
  • Interrupted communication on the Modbus network.

Remedy:
  • Check the connections of communication bus.
  • Check the time-out (parameter Modbus time out 704).
  • Refer to the Modbus user manual.
F024
HMI communication		 Cause:
  • Communication interruption with the external display terminal.

Remedy:
  • Check the terminal connection.
F029
Process underload		 Cause:
  • Process underload.
  • Time that motor current is below the Application Underload threshold 211 exceeds the Application underload time delay 210 to protect the application.

Remedy:
  • Check that drive parameters and application processes are compatible.
F027
IGBT overheat		 Cause:
  • Drive overheated.
  • IGBT internal temperature is too high for the ambient temperature and load.

Remedy:
  • Check the size of the load/motor/drive.
  • Reduce the Switching frequency (315).
  • Wait for the drive to cool down before restarting.
F031
Incorrect configuration		 Cause:
  • HMI block replaced by an HMI block configured on a drive with a different rating.
  • The current configuration of customer parameters is inconsistent.

Remedy:
  • Return to factory settings or retrieve the backup configuration, if it is valid.
  • If the fault remains after reverting to the factory settings, contact your local Schneider Electric representative.
F032 (1)
Invalid configuration		 Cause:
  • Invalid configuration.
  • The configuration loaded in the drive via the bus or communication network is inconsistent.
  • The configuration upload has been interrupted or is not fully finished.

Remedy:
  • Check the configuration loaded previously.
  • Load a compatible configuration.
F030
Undervoltage		 Cause:
  • Line supply too low.
  • Transient voltage dip.

Remedy:
  • Check the voltage and parameters on the Undervoltage phase loss menu (607).
InIt
Auto-initialization on start		 Cause:
  • Macro controller initialization.
  • Searching communication configuration.

Remedy:
No specific remedy listed (Status message).
COM.E (1)
Communication error		 Cause:
  • 50 ms time out error.
  • This message appears after 220 retry attempts.

Remedy:
Check communication wiring and configuration.
A-17 (1)
Key alarm		 Cause:
  • Key pressed down for longer than 10 seconds.
  • Membrane switch disconnected.
  • Display terminal woken up while a key is being pressed.

Remedy:
Check keypad/membrane buttons.
cLr (1)
Confirm fault reset		 Cause:
  • This message appears if the STOP key is pressed while the display terminal is displaying a fault.

Remedy:
Confirmation step.
dEU.E (1)
Drive mismatch		 Cause:
  • Drive type (brand) does not match display terminal type (brand).

Remedy:
Ensure terminal and drive brands match.
rOM.E (1)
ROM abnormality		 Cause:
  • ROM abnormality detected by checksum calculation.

Remedy:
Hardware check required.
rAM.E (1)
RAM abnormality		 Cause:
  • Display terminal RAM abnormality detected.

Remedy:
Hardware check required.
CPU.E (1)
Other fault		 Cause:
  • The other detected fault.

Remedy:
Check device general status.
 

How to Read ATV303 Faults & Menus

The ATV303 features a straightforward interface with a navigation dial. Understanding the menu structure is key to diagnostics.

  • Active Faults: When a fault occurs, the display flashes the code. The drive locks out operation until the fault is cleared. Common codes include OCF (Overcurrent) and OHF (Drive Overheat).
  • Status Codes (nSt / rdY): It is crucial to distinguish between a fault and a status.
    • rdY: Drive is ready, waiting for a start command.
    • nSt: Freewheel Stop. The drive is healthy but has no command to run (or the “Stop” logic is active).
  • Fault History (LFt): To view the most recent fault, navigate to the SUP- (Monitoring) menu and locate parameter LFt (Last Fault). This allows you to identify the cause of a trip even after the drive has been power-cycled.

Frequently Asked Questions (FAQ)

Q: The drive shows “nSt” and won’t run. Is it faulty?

A: No. nSt stands for Freewheel Stop.
Common Causes:
1. 2-Wire Control: If you apply power while the Run switch is already On, the drive prevents starting for safety. Cycle the Run switch Off and On.
2. Stop Input: Check if a Logic Input assigned to “Free Stop” is open (active low).
3. Local Mode: You may have pressed the STOP button on the keypad while in Terminal Control mode.

Q: What is the difference between “OCF” and “SCF”?

A:
OCF (Overcurrent): The motor is drawing too much current due to load inertia, jamming, or aggressive acceleration ramps. This is usually a parameter or mechanical issue.
SCF (Short Circuit): This indicates a hard electrical fault. SCF1 suggests a short circuit at the motor terminals or cable. SCF3 indicates a ground fault. Do not reset repeatedly; check insulation with a megger.

Q: How do I reset the ATV303?

A:
1. Power Cycle: Turn off the mains power, wait for the display to go completely blank, and turn it back on.
2. Logic Input: Trigger the specific Digital Input assigned to “Fault Reset” (rSF).
3. Keypad: Press the STOP/RESET button (if enabled in the configuration).

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