Omron 3G3MX2-V2 Drive

Omron 3G3MX2-V2 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
E01
Overcurrent protection (Constant speed)
Cause: Rapid load fluctuation, output short-circuit, or ground fault during constant speed.



Remedy:

  • Eliminate load fluctuation.

  • Check the output wiring.

  • Check the output wiring and the motor for ground faults.
E02
Overcurrent protection (Deceleration)
Cause: Rapid deceleration causing large current.



Remedy:

  • Increase the deceleration time.
E03
Overcurrent protection (Acceleration)
Cause: Rapid acceleration, motor locked, torque boost too high, or PM motor adjustment issue.



Remedy:

  • Increase the acceleration time.

  • Check the motor and wiring (is motor locked?).

  • Decrease the torque boost setting.

  • If a PM motor is in use, ensure motor is set and adjusted properly.
E04
Overcurrent protection (Others)
Cause: DC injection braking power too high.



Remedy:

  • Decrease the braking power.
E05
Overload protection
Cause: The inverter output current exceeded limits (motor overload).



Remedy:

  • Reduce the load rate (Is the load too heavy?).

  • Adjust the thermal level (b012/b212) to an appropriate level.

  • Increase the acceleration time (ensure torque is sufficient).
E06
Braking resistor overload protection
Cause: Usage rate of regenerative braking circuit exceeds value set in b090.



Remedy:

  • Increase the deceleration time (reduce rapid deceleration).

  • Increase the operation cycle time.
E07
Overvoltage protection
Cause: High DC voltage due to regenerative energy or high incoming voltage (>400VDC for 200V class / >800VDC for 400V class).



Remedy:

  • Increase the deceleration time.

  • Check the output wiring and motor for ground faults.

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

  • Lower the incoming voltage or install AC reactor.
E08
EEPROM error
Cause: Error in built-in EEPROM due to external noise or abnormal temperature.



Remedy:

  • Take measures against noise source.

  • Check the cooling fin for clogging and clean it.

  • Perform parameter initialization if error persists after power cycle.
E09
Undervoltage
Cause: Incoming voltage drops below specified level; Control circuit failure.



Remedy:

  • Check the power supply voltage.

  • Check the power supply capacity.

  • Check if smoothing capacitor has deteriorated over time.
E10
Current detector error
Cause: Error in the current detector.



Remedy:

  • The inverter has a defect; repair it.
E11
CPU error
Cause: Malfunction or error in built-in CPU.



Remedy:

  • Take measures against large noise sources.

  • The inverter has a defect; repair it.
E12
External trip
Cause: Multi-function input allocated to External Trip (12: EXT) turned ON.



Remedy:

  • Check the external equipment for defects.

  • Take measures against noise sources.
E13
USP error
Cause: Power supply turned on while RUN signal was ON (when USP function selected).



Remedy:

  • Check the RUN command (ensure it is off before power on).
E14
Grounding protection
Cause: Ground fault detected between inverter output and motor upon power on.



Remedy:

  • Check output wiring and motor for ground faults.

  • Disconnect output wiring to check if fault is in inverter itself.

  • Check the main circuit.
E15
Incoming overvoltage protection
Cause: Incoming voltage in overload state for 100s (DC voltage >390VDC for 200V / >780VDC for 400V).



Remedy:

  • Lower the incoming voltage.

  • Suppress power supply fluctuation.

  • Install AC reactor in input power circuit.
E19
Temperature detection error
Cause: Cooling fin temperature detection system error (e.g., disconnection).



Remedy:

  • The Inverter is faulty; repair it.
E21
Abnormal temperature
Cause: Main circuit temperature exceeds limit (high ambient temp, fan issue).



Remedy:

  • Check installation (is it vertical?).

  • Decrease ambient temperature.

  • Check cooling fan (Set b092 to Always enabled; check fan power).

  • Clean cooling fins if clogged.
E22
CPU communication error
Cause: Malfunction in CPU during communications.



Remedy:

  • Take measures against noise.

  • The inverter is faulty; repair it.
E25
Main circuit error
Cause: Error occurred in the main circuit board.



Remedy:

  • Take measures against noise.

  • The inverter is faulty; repair it.
E26
Analog current input error
Cause: Excessive current flows through analog current input terminal FI.



Remedy:

  • Check for short-circuit or incorrect wiring in FI wiring.

  • If wiring is fine, control circuit board is faulty (Repair).
E30
Driver error
Cause: Momentary overcurrent (350%+), abnormal temp, or drive power drop detected by driver IC.



Remedy:

  • Check output wiring for short-circuit.

  • Check output wiring and motor for ground fault.

  • Check IGBT (Main element damaged?).

  • Clean cooling fin if clogged.
E35
Thermistor error
Cause: External thermistor detected abnormal temp or wiring issue.



Remedy:

  • Check motor temperature.

  • Check if thermistor is damaged.

  • Separate wiring to prevent noise in thermistor signal.
E36
Brake error
Cause: Inverter cannot recognize ON/OFF status of brake within detection time (b124).



Remedy:

  • Check if brake ON/OFF function is working.

  • Increase the b124 value (Time set too short?).

  • Check wiring for brake confirmation signal.
E37
Emergency shutoff
Cause: Safety input terminal GS1/GS2 active.



Remedy:

  • Check GS1/GS2 wiring and sequence.

  • Check GS Input Operation Selection (b145) setting.
E38
Low speed overload protection
Cause: Overload detected in extremely low speed range (0.2 Hz or lower).



Remedy:

  • Reduce the load rate.
E40
Digital Operator connection failure
Cause: Disconnection communicating with remote Digital Operator.



Remedy:

  • Check/replace the cable.

  • Note: Detection disabled when b165 is set to 02.
E41
Modbus communication error
Cause: Timeout occurred (Communication Error C076 is set to Trip).



Remedy:

  • Check communication speed setting.

  • Check if wiring distance is appropriate.

  • Check for disconnected wires.

  • Check terminating resistor setting.
E43 to E45
DriveProgramming error
Cause: Program error.



Remedy:

  • For details, refer to the DriveProgramming User’s Manual.
E50 to E59
User trip
Cause: User trip executed via DriveProgramming.



Remedy:

  • Refer to the DriveProgramming User’s Manual.
E60 to E68
Option error
Cause: Error received from the option unit (e.g., EtherCAT).



Remedy:

  • For details, refer to the manual for the specific option unit.
E69
Option timeout
Cause: Timeout in communications between inverter and option unit.



Remedy:

  • Check that option unit housing is mounted properly.

  • Check fixation screws are not loose.

  • Option unit may be faulty.
E80
Encoder disconnection
Cause: Encoder wiring disconnected or improperly connected.



Remedy:

  • Check encoder wiring.

  • Adjust P077 (Detection Time) and P015 (Creep Speed).
E81
Overspeed
Cause: Motor rotation speed exceeds Maximum Frequency x Overspeed Error Level.



Remedy:

  • Check encoder wiring.

  • Check number of encoder pulses (P011).

  • Check load conditions.

  • Adjust Output Frequency Setting (F001) or Overspeed Detection Level (P026).
E83
Position control range trip
Cause: Current position out of range set in Position Limit Setting (P072, P073).



Remedy:

  • Check the current position.

  • Check parameter settings (P072, P073, P060-P067).

  • Check the origin.
E99
STO internal fault error
Cause: Fault detected in STO input terminal or internal safety circuit.



Remedy:

  • Perform a periodic functional test (Safety function check).

  • The internal safety circuit is faulty; repair it.