Omron 3G3MX2-V1 Drive

Omron 3G3MX2-V1 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
E01
Overcurrent protection (Constant speed)
Cause:

The inverter output current exceeded approximately 200% of the rated output current during constant speed operation. Possible causes include rapid load fluctuation, output short-circuit, or ground fault.



Remedy:


  • Eliminate load fluctuation.

  • Check the output wiring.

  • Check the output wiring and the motor for ground faults.
E02
Overcurrent protection (Deceleration)
Cause:

The inverter output current exceeded approximately 200% of the rated output current during deceleration.



Remedy:


  • Increase the deceleration time.
E03
Overcurrent protection (Acceleration)
Cause:

The inverter output current exceeded approximately 200% of the rated output current during acceleration.



Remedy:


  • Increase the acceleration time.

  • Check if the motor is locked (check motor and wiring).

  • Decrease the torque boost setting (if too high).

  • If a PM motor is in use, check if the motor is set and adjusted properly.
E04
Overcurrent protection (Others)
Cause:

Overcurrent detected during other states (e.g., DC injection braking power too high).



Remedy:


  • Decrease the braking power.
E05
Overload protection
Cause:

The internal electronic thermal function detected a motor overload.



Remedy:


  • Reduce the load rate (load is too heavy).

  • Adjust the thermal level setting (b012/b212) to an appropriate level.
E06
Braking resistor overload protection
Cause:

The usage rate of the regenerative braking circuit exceeded the value set in b090.



Remedy:


  • Increase the deceleration time.

  • Increase the operation cycle time.
E07
Overvoltage protection
Cause:

Extremely high DC voltage between P/+2 and N/- (approx 400 VDC for 200-V class or 800 VDC for 400-V class). Caused by regenerative energy or increased incoming voltage.



Remedy:


  • Increase the deceleration time.

  • Check the output wiring and motor for ground faults.

  • Decrease the amount of regeneration (if motor is rotated from load side).

  • Lower the incoming voltage or install an AC reactor to suppress fluctuation.
E08
EEPROM error
Cause:

Error in the built-in EEPROM due to external noise or abnormal temperature rise.



Remedy:


  • Take measures against noise (large noise source nearby).

  • Check the cooling fin for clogging and clean it.

  • Turn off power supply. If error persists, memory may be corrupt (perform initialization).
E09
Undervoltage
Cause:

Incoming voltage dropped below specified level, causing DC voltage to drop (approx 173 VDC for 200-V class or 345 VDC for 400-V class).



Remedy:


  • Check the power supply voltage.

  • Check the power supply capacity.

  • Check if the thyristor in the inrush current protection circuit is broken.
E10
Current detector error
Cause:

An error occurred in the current detector.



Remedy:


  • The inverter has a defect. Repair it.
E11
CPU error
Cause:

Malfunction or error in the built-in CPU.



Remedy:


  • Take measures against noise (large noise source nearby).

  • The inverter has a defect. Repair it.
E12
External trip
Cause:

The multi-function input terminal allocated to the External trip (12: EXT) function turned ON.



Remedy:


  • The external equipment has a defect. Check the external equipment.
E13
USP error
Cause:

The power supply was turned on while the RUN signal was ON (only when USP function is selected).



Remedy:


  • Check the RUN command (ensure it is off before power on).
E14
Grounding protection
Cause:

A ground fault was detected between the inverter output unit and the motor when power was turned on.



Remedy:


  • Check the output wiring and the motor for ground faults.

  • Disconnect output wiring and check the inverter itself.

  • Check the main circuit.
E15
Incoming overvoltage protection
Cause:

Incoming voltage remained in an overload state for 100 seconds (DC voltage approx 390 VDC for 200-V class or 780 VDC for 400-V class).



Remedy:


  • Lower the incoming voltage.

  • Suppress power supply fluctuation.

  • Install the AC reactor in the input power circuit.
E21
Abnormal temperature
Cause:

The temperature in the main circuit exceeded the specified value due to high ambient temperature or improper installation.



Remedy:


  • Check the installation (is inverter installed vertically?).

  • Decrease the ambient temperature.
E22
CPU communication error
Cause:

Malfunction or error in the built-in CPU during communications.



Remedy:


  • Take measures against noise.

  • The inverter is faulty. Repair it.
E25
Main circuit error
Cause:

An error occurred in the main circuit board.



Remedy:


  • Take measures against noise.

  • The inverter is faulty. Repair it.
E30
Driver error
Cause:

Momentary overcurrent (350% of rated), abnormal temperature in main element, or voltage drop detected by driver IC.



Remedy:


  • Check the output wiring for short-circuits.

  • Check output wiring and motor for ground faults.

  • Check the IGBT (is main element damaged?).

  • Clean the cooling fin if clogged.
E35
Thermistor error
Cause:

Abnormal temperature detected from external thermistor resistance value.



Remedy:


  • Check if motor temperature is too high.

  • Check if the thermistor is damaged.

  • Separate the wiring (noise in thermistor signal).
E36
Brake error
Cause:

Inverter cannot recognize ON/OFF status of brake within Brake Error Detection Time (b124).



Remedy:


  • Check the brake ON/OFF function.

  • Increase the b124 value (time set is too short).

  • Check the wiring for the brake confirmation signal input.
E37
Emergency shutoff
Cause:

The safety input terminals GS1/GS2 are active.



Remedy:


  • Check the wiring and sequence of GS1/GS2 signals.

  • Check the GS Input Operation Selection (b145) setting.
E38
Overload protection (Low speed)
Cause:

Overload detected in extremely low speed range (0.2 Hz or lower).



Remedy:


  • Reduce the load rate.
E40
Digital Operator connection failure
Cause:

Error or disconnection communicating with external Digital Operator.



Remedy:


  • Check/replace the cable.
E41
Modbus communication error
Cause:

Timeout occurs when Operation Selection on Communication Error (C076) is set to 00.



Remedy:


  • Check the communication speed setting.

  • Check the communications wires and wiring distance.

  • Check for any disconnected wires.
E43 – E45
DriveProgramming error
Cause:

Program error in DriveProgramming.



Remedy:


  • Refer to the DriveProgramming User’s Manual.
E50 – E59
User trip
Cause:

User trip initiated by DriveProgramming.



Remedy:


  • Refer to the DriveProgramming User’s Manual.
E60 – E68
Option error
Cause:

Error received from the mounted option unit (e.g., EtherCAT or CompoNet fatal fault).



Remedy:


  • Refer to the manual for the specific option unit.
E69
Option timeout
Cause:

Timeout in communications between the inverter and the option unit.



Remedy:


  • Check that the housing of the option unit is mounted properly.

  • Check that fixation screws are not loosened.

  • The option unit may be faulty.
E80
Encoder disconnection
Cause:

The encoder wiring is disconnected, or motor rotation speed detected is lower than Starting Frequency for the set duration.



Remedy:


  • Check the encoder wiring.

  • Adjust parameter values (set longer time in P077, higher value in P015).
E81
Overspeed
Cause:

Motor rotation speed exceeds Maximum Frequency × Overspeed Error Detection Level.



Remedy:


  • Check the encoder wiring.

  • Check the number of encoder pulses (P011).

  • Adjust the Overspeed Error Detection Level (P026).
E83
Position control range trip
Cause:

Current position is out of the range set in Position Limit Setting (P072, P073) during simple position control.



Remedy:


  • Check the current position.

  • Check the parameter settings (P072, P073).

  • Check the origin.