Hitachi WJ-C1 Drive

Hitachi WJ-C1 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
E01.*

Over current error (Constant speed)
Cause:

  • Is there a steep load change?

  • Is there an output short circuit?

  • Is there a ground fault?




Remedy:

  • Eliminate load fluctuation.

  • Check the output line.

  • Check the output wires and motor.
E02.*

Over current error (During deceleration)
Cause: Rapid deceleration.



Remedy:

  • Increase the deceleration time.
E03.*

Over current error (During acceleration)
Cause:

  • Rapid acceleration.

  • Is motor locked?

  • Is the torque boost high?




Remedy:

  • Increase the acceleration time.

  • Check the motor and wiring.

  • Decrease the boost value.
E04.*

Over current error (Other)
Cause: Is DC braking high?



Remedy:

  • Decrease the DC braking force.
E05.*

Overload error
Cause:

  • Is the acceleration torque insufficient?

  • Is the load too heavy?

  • Is thermal level correct?




Remedy:

  • Increase the acceleration time.

  • Lower the load factor.

  • Set to the proper level.
E06.*

Braking resistor overload error
Cause:

  • Is it decelerating rapidly?

  • Is the operation cycle short?




Remedy:

  • Increase the deceleration time.

  • Increase the operating cycle.
E07.*

Overvoltage error
Cause:

  • Is it decelerating rapidly?

  • Is there a ground fault?

  • Is the motor rotated from the load side?

  • Is the power supply voltage rising?




Remedy:

  • Increase the deceleration time.

  • Check the output wires and motor.

  • Reduce the regeneration amount.

  • Lower the power supply voltage, suppress power fluctuations, or insert an AC reactor into the input.
E08.*

Memory error
Cause:

  • Is there a large noise source nearby?

  • Is the cooling efficiency lowered?




Remedy:

  • Noise suppression.

  • Check for clogging of the cooling fins and clean it, and replace the cooling fans.
E09.*

Undervoltage error
Cause:

  • Power supply voltage is not dropped?

  • Is the power supply capacity insufficient?

  • Is there any aging degradation of the smoothing capacitor?




Remedy:

  • Check the power supply.

  • See “Smoothing Capacitor Life Curve”.
E10.*

Current detector error
Cause: Inverter failure.



Remedy:

  • Repair.
E11.*

CPU error
Cause:

  • Is there a large noise source nearby?

  • Inverter failure.




Remedy:

  • Noise suppression.

  • Repair.
E12.*

External trip error
Cause:

  • Is input signal normal?

  • Is there a large noise source nearby?




Remedy:

  • Check the external input device and wiring.

  • Noise suppression.
E13.*

USP error
Cause: Is the power supply turned on with the RUN command input?



Remedy:

  • Check the operation signal.
E14.*

Ground fault
Cause:

  • Is there a ground fault?

  • Is there any abnormality in the inverter alone?

  • Is there any abnormality in the main circuit part?




Remedy:

  • Check the output wires and motor.

  • Disconnect and check the output wires.

  • Check the main circuit. (Refer to “Daily Inspection and Periodic Inspection”).
E15.*

Power supply overvoltage error
Cause: Is the power supply voltage too high?



Remedy:

  • Decrease the power supply voltage.

  • Suppress power supply fluctuations.

  • Insert an AC reactor into the input.
E19.*

Temperature detection error
Cause: Inverter failure.



Remedy:

  • Repair.
E21.*

Cooling fin temperature error
Cause:

  • Is the inverter mounted vertically?

  • Is the ambient temperature too high?

  • Is the cooling fan not stopped?

  • Is the cooling fin clogged?




Remedy:

  • Check the installation.

  • Lower the temperature.

  • Set “Cooling fan control method selection [b092]” to “Always (00)” and check fan power supply.

  • Clean the fin.
E22.*

CPU communication error
Cause:

  • Is there a large noise source nearby?

  • Inverter failure.




Remedy:

  • Noise suppression.

  • Repair.
E25.*

Main circuit error
Cause:

  • Is there a large noise source nearby?

  • Inverter failure.




Remedy:

  • Noise suppression.

  • Repair.
E26.*

Analog current input error
Cause:

  • Is [Ai2] wiring short-circuited or incorrect wiring?

  • Control circuit board failure.




Remedy:

  • Check the wiring.

  • Repair.
E30.*

Driver error
Cause:

  • Is there an output short circuit?

  • Is there a ground fault?

  • Is there any damage to the main element?




Remedy:

  • Check the output line.

  • Check the output wires and motor.

  • Checking IGBT (See “Checking the Inverter and Converter Section”).
E35.*

Thermistor error (Motor temperature error)
Cause:

  • Is the motor temperature too high?

  • Is there any damage to the thermistor?

  • Is there noise contamination to the thermistor signal?




Remedy:

  • Check the temperature.

  • Check the thermistor.

  • Wiring separation.
E36.*

Brake error
Cause:

  • Is ON/OFF operation of the braking normal?

  • Is the setting of [b124] too short?

  • Is the “Answer back from Brake [BOK]” signal turned on?




Remedy:

  • Check the brake.

  • Increase the [b124].

  • Check wiring.
E37.*

STO shut-off error
Cause:

  • Is [ST1]/[ST2] incorrectly input?

  • Is parameter setting correct?




Remedy:

  • Check the wiring and sequence of [ST1]/[ST2] input signals.

  • Check the [b145] setting.
E38.*

Low-speed range overload error
Cause: Is the load too heavy?



Remedy:

  • Lower the load factor.
E40.*

Remote operator communication error
Cause: Is there a communication error?



Remedy:

  • Check/replace the cable.
E41.*

Modbus communication error
Cause:

  • Is the settings of communication baud rate etc. correct?

  • Are the length and shield of the wirings appropriate? Also, are wires not broken?

  • Is the termination resistor setting correct?




Remedy:

  • Check the settings.

  • Check the communication wiring.

  • Check the termination resistor.
E43.*

EzSQ invalid instruction error
Cause: Invalid instruction detected in EzSQ program.



Remedy:

  • Refer to “Inverter configuration software ProDriveNext instruction manual”.
E44.*

EzSQ nesting count error
Cause: Nesting count exceeds allowable executed number.



Remedy:

  • Refer to “Easy-Sequence Function (EzSQ) Programming Guide”.
E45.*

EzSQ execution error
Cause: Instruction that cannot be executed is detected.



Remedy:

  • Refer to EzSQ Programming Guide.
E50.* to E59.*

EzSQ user-assigned error 0 to 9
Cause: Corresponding user-assigned tripping programs executed in EzSQ.



Remedy:

  • Check user program logic.
E60.* to E69.*

Option related error
Cause:

  • Is the option board connected properly?

  • Is there a mistake in usage?




Remedy:

  • Check connector fitting.

  • Check the instruction manual for the option.
E80.*

Encoder disconnection error
Cause:

  • Are there any broken or faulty connections in the encoder wiring?

  • Are the parameter settings correct?




Remedy:

  • Check the encoder wiring.

  • Increase [P077] and set [P015] to a higher value.
E81.*

Overspeed error
Cause:

  • Are there any broken or faulty connections in the encoder wiring?

  • Are the parameter settings correct?

  • Is the actual motor speed higher than the error detection level?




Remedy:

  • Check the encoder wiring.

  • Check “Output frequency setting or monitor [F001]” and Encoder constant [P011].

  • Check the load status and adjust [P026].
E83.*

Position control range error
Cause: Is the current position and home position correct?



Remedy:

  • Check [P072] and [P073].

  • Check [P060] to [P067].

  • Check the home position.
E98.*

ST1/ST2 mismatch error
Cause:

  • Is [ST1]/[ST2] incorrectly input?

  • Is parameter setting correct?




Remedy:

  • Check [ST1]/[ST2] input signal wiring and perform function tests.

  • Check the [b145] setting.
E99.*

STO internal failure error
Cause: Is the safety function working properly?



Remedy:

  • Perform function tests.

  • Failure in the internal safety path -> Repair.