Inovance MD500 Plus Drive

Inovance MD500 Plus Drive Fault Codes:

Fault Code and MeaningCause and Remedy
E02.00

Overcurrent during acceleration

Cause: Grounded or short-circuited output circuit of the AC drive.


Remedy:

  • Check whether the motor or relay contactor is short-circuited.




Cause: Auto-tuning is not performed in SVC or FVC control mode.


Remedy:

  • Set motor parameters according to the motor nameplate and perform motor auto-tuning.




Cause: Excessively short acceleration time.


Remedy:

  • Increase the acceleration time (F0-17).




Cause: Inappropriate overcurrent stall suppression.


Remedy:

  • Ensure that overcurrent stall suppression (F3-19) is enabled.

  • If the value of F3-18 (overcurrent stall suppression level) is too large, adjust it to a level between 120% and 160%.

  • If the value of F3-20 (overcurrent stall suppression gain) is too small, adjust it to a level between 20 and 40.




Cause: Inappropriate customized torque boost or V/f curve.


Remedy:

  • Adjust the customized torque boost or V/f curve.




Cause: Startup of a running motor.


Remedy:

  • Use flying start or restart the motor after the motor stops.




Cause: External interference to the AC drive.


Remedy:

  • View the fault records to check whether the fault current has ever reached the overcurrent suppression level (F3-18).

  • If not, check for external interference source.

  • If no external interference source is found, the driver board or Hall device might be damaged. Contact Inovance for replacement.
E03.00

Overcurrent during deceleration

Cause: Grounded or short-circuited output circuit of the AC drive.


Remedy:

  • Check whether the motor is short-circuited or open-circuited.




Cause: Auto-tuning is not performed in SVC or FVC control mode.


Remedy:

  • Set motor parameters according to the motor nameplate and perform motor auto-tuning.




Cause: Excessively short deceleration time.


Remedy:

  • Increase the deceleration time (F0-18).




Cause: Inappropriate overcurrent stall suppression.


Remedy:

  • Ensure that overcurrent stall suppression (F3-19) is enabled.

  • If the value of F3-18 is too large, adjust it to a level between 120% and 150%.

  • If the value of F3-20 is too small, adjust it to a level between 20 and 40.




Cause: The braking unit and braking resistor are not installed.


Remedy:

  • Install a braking unit and a braking resistor.




Cause: External interference to the AC drive.


Remedy:

  • View fault records to check if current reached suppression level (F3-18).

  • Check for external interference. If none, driver board/Hall device might be damaged. Contact Inovance.
E04.00

Overcurrent during operation at constant speed

Cause: Grounded or short-circuited output circuit of the AC drive.


Remedy:

  • Check whether the motor is short-circuited or open-circuited.




Cause: Auto-tuning is not performed in SVC or FVC control mode.


Remedy:

  • Set motor parameters according to the motor nameplate and perform motor auto-tuning.




Cause: Inappropriate overcurrent stall suppression.


Remedy:

  • Ensure overcurrent stall suppression (F3-19) is enabled.

  • Adjust F3-18 between 120% and 150%.

  • Adjust F3-20 between 20 and 40.




Cause: Inadequate power rating of the AC drive.


Remedy:

  • If running current exceeds rated motor current or rated output current during stable running, select an AC drive with a higher power rating.




Cause: External interference to the AC drive.


Remedy:

  • Check fault records and external interference sources. Contact Inovance if board is damaged.
E05.00

Overvoltage during acceleration

Cause: High input grid voltage.


Remedy:

  • Adjust the voltage to the normal range.




Cause: External force driving the motor during acceleration.


Remedy:

  • Cancel the external force or install a braking resistor.

  • If F3-26 (frequency rise threshold during overvoltage suppression) is too small, adjust it to between 5 Hz and 15 Hz.




Cause: Inappropriate overvoltage suppression.


Remedy:

  • Ensure overvoltage suppression (F3-23) is enabled.

  • If F3-22 is too large, adjust it to between 700 V and 770 V.

  • If F3-24 is too small, adjust it to between 30 and 50.




Cause: The braking unit and braking resistor are not installed.


Remedy:

  • Install a braking unit and a braking resistor.




Cause: Excessively short acceleration time.


Remedy:

  • Increase the acceleration time.
E06.00

Overvoltage during deceleration

Cause: Inappropriate overvoltage suppression.


Remedy:

  • Ensure overvoltage suppression (F3-23) is enabled.

  • If F3-22 is too large, adjust it to between 700 V and 770 V.

  • If F3-24 is too small, adjust it to between 30 and 50.




Cause: External force driving the motor during deceleration.


Remedy:

  • Cancel the external force or install a braking resistor.

  • If F3-26 is too small, adjust it to between 5 Hz and 15 Hz.




Cause: Excessively short deceleration time.


Remedy:

  • Increase the deceleration time.




Cause: The braking unit and braking resistor are not installed.


Remedy:

  • Install a braking unit and a braking resistor.
E07.00

Overvoltage during operation at constant speed

Cause: Inappropriate overvoltage suppression.


Remedy:

  • Ensure overvoltage suppression (F3-23) is enabled.

  • If F3-22 is too large, adjust it to between 700 V and 770 V.

  • If F3-24 is too small, adjust it to between 30 and 50.




Cause: External force driving the motor during operation.


Remedy:

  • Cancel the external force or install a braking resistor.

  • If F3-26 is too small, adjust it to between 5 Hz and 15 Hz.
E09.00

Undervoltage

Cause: Instantaneous power failure.


Remedy:

  • Enable the power dip ride-through function (F9-59).




Cause: AC drive input voltage out of range.


Remedy:

  • Adjust the voltage to a value within the normal range.




Cause: Abnormal bus voltage.


Remedy:

  • Contact Inovance for technical support.




Cause: Abnormal rectifier, IGBT driver board, or IGBT control board.


Remedy:

  • Contact Inovance for technical support.
E10.00

AC drive overload

Cause: Excessively heavy load or stalled motor.


Remedy:

  • Reduce the load and check the motor and mechanical conditions.




Cause: Inadequate power rating of the AC drive.


Remedy:

  • Use an AC drive with a higher power rating.




Cause: Auto-tuning is not performed in SVC or FVC control mode.


Remedy:

  • Set motor parameters according to the motor nameplate and perform motor auto-tuning.




Cause: Excessively high torque boost (F3-01) in V/f control mode.


Remedy:

  • Decrease the value of F3-01 by 1.0% each time or set F3-01 to 0 (automatic torque boost).




Cause: Output phase loss on the AC drive.


Remedy:

  • Check the output wiring of the AC drive.
E11.00

Motor overload

Cause: Inappropriate F9-01 (motor overload protection gain) setting.


Remedy:

  • Increase the value of F9-01 to prolong the motor overload time.




Cause: Excessively heavy load or stalled motor.


Remedy:

  • Reduce the load and check the motor and mechanical conditions.
E12.00

Input phase loss

Cause: Input phase loss.


Remedy:

  • Ensure proper input RST cables and three-phase input voltage.
E13.00

Output phase loss

Cause: Motor fault.


Remedy:

  • Check whether the motor is disconnected.




Cause: Abnormal lead wire connecting the AC drive to the motor.


Remedy:

  • Rectify external faults.




Cause: Unbalanced three-phase output of the AC drive during motor operation.


Remedy:

  • Ensure proper functioning of the motor three-phase winding.




Cause: Abnormal driver board or IGBT.


Remedy:

  • Contact the agent or Inovance for technical support.
E14.00

IGBT overtemperature
Cause:

High ambient temperature; Blocked air filter; Damaged fan; Damaged thermistor of the IGBT; Damaged IGBT.



Remedy:



  • Lower the ambient temperature.

  • Clean the air filter.

  • Replace the damaged fan.

  • Contact the agent or Inovance for technical support.
E15.01

External fault
Cause:

External fault signal input to the multi-function DI terminal (normally open).



Remedy:


Rectify the external fault, and ensure that the mechanical condition allows restart (F8-18).
E15.02

External fault
Cause:

External fault signal input to the multi-function DI terminal (normally closed).



Remedy:


Rectify the external fault, and ensure that the mechanical condition allows restart (F8-18).
E16.01

Communication fault (Modbus)
Cause:

Modbus communication timeout.



Remedy:



  • Ensure proper wiring of the RS485 communication cable.

  • Ensure proper settings of FD-04 and PLC communication cycle.
E16.11

Communication fault (CANopen)
Cause:

CANopen communication timeout.



Remedy:



  • Ensure proper connection of the CAN communication cable.

  • Check the values of FD-15 to FD-17 and eliminate interference.
E16.12

Communication fault (CANopen PDO)
Cause:

Inconsistency between the configured CANopen-based PDO mapping and the actual mapping.



Remedy:


Check the PDO mapping of parameters in group AF.
E16.21

Communication fault (CANlink)
Cause:

CANlink heartbeat timeout.



Remedy:



  • Ensure proper connection of the CAN communication cable.

  • Check the values of FD-15 to FD-17 and eliminate interference.
E16.22

Communication fault (CANlink Conflict)
Cause:

CANlink station number conflict.



Remedy:


Change the value of FD-13 to make CANlink station numbers different from each other.
E17.00

Contactor fault
Cause:

Abnormal driver board and power supply; Abnormal contactor; Abnormal lightning protection board.



Remedy:



  • Replace the driver board or power supply board.

  • Replace the contactor.

  • Replace the lightning protection board.
E18.00

Damaged current sampling circuit
Cause:

Abnormal AC drive current sampling.



Remedy:



  • Power on the main circuit.

  • If the Hall sensor or sampling current circuit is damaged, contact Inovance.
E19.02

Motor auto-tuning fault
Cause:

Fault in auto-tuning on the magnetic pole position angle of the synchronous motor.



Remedy:


Ensure that the motor is connected and there is no output phase loss.
E19.06
E19.07
E19.08

Motor auto-tuning fault
Cause:

Fault in auto-tuning on the stator resistance.



Remedy:



  • Ensure that the motor is connected.

  • Set F1-03 (rated motor current) according to the motor nameplate.
E19.09
E19.10

Motor auto-tuning fault
Cause:

Fault in auto-tuning on the transient leakage inductance of the asynchronous motor.



Remedy:



  • Check whether the motor is connected or output phase is normal without loss.

  • Ensure that the motor is connected properly.
E19.11

Motor auto-tuning fault
Cause:

Inertia auto-tuning fault.



Remedy:



  • Set F1-03 (rated motor current) according to the motor nameplate.

  • Increase the value of F2-43 (inertia auto-tuning and dynamic speed reference).
E19.20

Motor auto-tuning fault
Cause:

Timeout of auto-tuning on the no-load zero position angle of the synchronous motor.



Remedy:


Check the Z feedback signal.
E19.23

Motor auto-tuning fault
Cause:

Fault in auto-tuning on the magnetic pole position of the synchronous motor.



Remedy:



  • Set F1-03 (rated motor current) according to the motor nameplate.

  • Decrease the value of F2-29 (synchronous motor initial angle detection current).
E19.24

Motor auto-tuning fault
Cause:

Errors in auto-tuning on the transient leakage inductance of the asynchronous motor.



Remedy:


Check whether the power rating of the AC drive is low. If yes, use an AC drive with a proper power rating matching the motor power.
E20.00

Encoder fault
Cause:

Encoder disconnected.



Remedy:


Restore the connection.
E20.01
E20.02
E20.03…E20.08

Encoder fault / Disconnected / Tuning fault
Cause:

General encoder faults, disconnections, or faults during no-load/with-load auto-tuning.



Remedy:



  • Ensure proper wiring of the PG cable.

  • Ensure proper wiring of the PG cable and power supply.

  • Ensure consistency between the encoder pulses per revolution and the value of F1-27.

  • Ensure proper wiring of the AB signal cable.
E20.09

Encoder fault
Cause:

Encoder fault during auto-tuning of the synchronous motor.



Remedy:


Check the encoder Z signal and wiring of the PG card.
E20.10

Encoder fault
Cause:

Synchronous motor encoder fault.



Remedy:


See general encoder remedies (Connection, F1-27 consistency).
E20.11

Encoder fault
Cause:

The encoder is faulty during FVC no-load auto-tuning of the asynchronous motor.



Remedy:



  • Ensure that the encoder is properly connected.

  • Ensure consistency between the encoder pulses per revolution and the value of F1-27.
E20.12

Encoder fault
Cause:

Excessive deviation between the encoder feedback speed and the speed estimated by SVC.



Remedy:



  • Check for encoder disconnection.

  • Ensure proper setting of motor parameters.

  • Ensure that motor auto-tuning is performed.
E20.13

Encoder fault
Cause:

Resolver encoder disconnected.



Remedy:


Check the wiring of the encoder.
E20.17

Encoder fault
Cause:

23-bit encoder disconnected.



Remedy:


Check the wiring of the 23-bit encoder.
E21.01
E21.02
E21.03
E21.04

EEPROM read/write fault
Cause:

EEPROM read/write abnormality.



Remedy:



  • For communication write parameters, check the RAM addresses and the RAM address mapping of the parameters. (See 6.2.4 Parameter Address Rules).

  • If the EEPROM chip is damaged, contact Inovance to replace the control board.
E22.00
Motor auto-tuning error
Cause:

Auto-tuned stator resistance out of range.


Remedy:


  • Correctly set F1-02 (rated motor voltage) and F1-03 (rated motor current) in group F1 according to the motor nameplate.
E22.01
Motor auto-tuning error
Cause:

Auto-tuned rotor resistance of the asynchronous motor out of range.


Remedy:


  • Ensure that auto-tuning is performed after the motor stops.
E22.02
Motor auto-tuning error
Cause:

The no-load current and mutual inductance of the asynchronous motor obtained through auto-tuning exceed the allowed range.

(Note: If this alarm is reported, the AC drive calculates values based on known parameters which may not be optimal).


Remedy:


  • Set motor parameters in group F1 according to the motor nameplate.

  • Ensure that the motor has no load before auto-tuning.
E22.03
Motor auto-tuning error
Cause:

Auto-tuned back EMF of the synchronous motor out of range.


Remedy:


  • Set F1-02 (rated motor voltage) according to the motor nameplate.

  • Ensure that the motor has no load before auto-tuning.
E22.04
Motor auto-tuning error
Cause:

Inertia auto-tuning fault.


Remedy:


  • Set F1-03 (rated motor current) according to the motor nameplate.
E23.00
Short circuit to ground
Cause:

Motor shorted to the ground.


Remedy:


  • Check and replace the motor cables and motor if necessary.
E24.00
Motor inter-phase short circuit
Cause:

Motor inter-phase short circuit.


Remedy:


  • Check whether a two-phase short circuit occurs on the output UVW.
E25.00
Rectifier fault
Cause:

Rectifier fault (e.g., input phase loss, overtemperature).


Remedy:

Rectify corresponding faults based on feedback signals:

  • 1: Operation enabled

  • 2: Incoming circuit breaker feedback

  • 3: Auxiliary circuit breaker feedback

  • 4: Leakage protection switch feedback (Alarm reported if no signal)

  • 6: Inverter unit operation inhibited

  • 7: Inverter unit coast-to-stop

  • 8: User-defined inverter unit stop (Alarm reported if terminal active)
E26.00
Accumulative running time reach
Cause:

The accumulative running time has reached the reference value.


Remedy:


  • Clear the record through parameter initialization.
E27.00
User-defined fault 1
Cause:

The user-defined fault 1 signal is input via the DI OR input through the virtual I/O function.


Remedy:


  • Perform a reset.
E28.00
User-defined fault 2
Cause:

The user-defined fault 2 signal is input via the DI OR input through the virtual I/O function.


Remedy:


  • Perform a reset.
E29.00
Accumulative power-on time reach
Cause:

The accumulative power-on time has reached the reference value.


Remedy:


  • Clear the record through parameter initialization.
E30.00
Load lost
Cause:

Running current of the AC drive less than the value of F9-64.


Remedy:


  • Check for load disconnection and mismatching between the values of F9-64 and F9-65 and actual working conditions.
E31.00
PID feedback loss during operation
Cause:

PID feedback less than the value of FA-26.


Remedy:


  • Check the PID feedback signals or set FA-26 to a proper value.
E40.00
Pulse-by-pulse current limit fault
Cause:

1. Excessively heavy load or stalled motor.

2. Inadequate power rating of the AC drive.


Remedy:


  • Reduce the load and check the motor and mechanical conditions.

  • Use an AC drive with a higher power rating.
E42.00
Excessive speed deviation
Cause:

1. Incorrect setting of encoder parameters.

2. Auto-tuning is not performed on parameters.

3. Inappropriate setting of F9-69 and F9-70.


Remedy:


  • Set encoder parameters properly.

  • Perform motor parameter auto-tuning.

  • Set the parameters correctly based on actual conditions.
E43.00
Motor overspeed
Cause:

1. Incorrect setting of encoder parameters.

2. Auto-tuning is not performed on parameters.

3. Inappropriate setting of F9-67 and F9-68.


Remedy:


  • Set encoder parameters properly.

  • Perform motor parameter auto-tuning.

  • Set the parameters correctly based on actual conditions.
E45.00
Motor overtemperature
Cause:

1. Temperature sensor loosely connected.

2. High motor temperature.

3. Excessively low value of F9-57 (motor overtemperature protection threshold).


Remedy:


  • Check the wiring of the temperature sensor.

  • Increase the carrier frequency or take other heat dissipation measures to cool the motor.

  • Adjust the threshold to a level between 90°C and 100°C.
E60.00
AC drive overtemperature
Cause:

High internal temperature of the AC drive.


Remedy:


  • Replace the fan in the AC drive.

  • Contact Inovance.
E61.00
Braking transistor overload
Cause:

Excessively low resistance of the braking resistor.


Remedy:


  • Use a braking resistor with higher resistance.
E62.00
Braking transistor short circuit
Cause:

Braking transistor short circuit.


Remedy:


  • Ensure proper functioning of the braking transistor.

  • Check whether an external braking resistor is installed.
E63.00
Low liquid level alarm
Cause:

Low liquid level of the water tank.


Remedy:


  • Add coolant.
E64.00
Water cooling system fault
Cause:

Water-cooling system control unit fault.


Remedy:


  • Perform a reset.

  • Replace the control unit.