Inovance MD200 Drive Fault Codes List

A comprehensive guide to Inovance MD200 mini drive fault codes. Learn to interpret Err codes, access historical data via the keypad, and resolve general purpose drive issues.

Inovance MD200 Fault Codes Reference Table

Below is the complete list of fault codes and troubleshooting actions associated with the MD200 series.

Fault Codes	Cause & Solution
Err02 Overcurrent during acceleration	Cause & Solution: 1. Ground fault or short circuit exists in the output circuit. - Check whether short-circuit occurs on the motor, the motor cable or contactor. 2. Acceleration time is too short. - Increase acceleration time. 3. Customized torque boost or V/F curve is not appropriate. - Adjust the customized torque boost or V/F curve. 4. The voltage is too low. - Adjust the voltage to normal range. 5. The spinning motor is started. - Enable the catching a spinning motor function or start the motor after it stops. 6. A load is applied suddenly during acceleration. - Cancel the suddenly added load. 7. The rated AC drive power is low. - Replace the drive by one with higher rated power. 8. The braking resistor resistance is small. - The braking resistor is short circuited. - Replace a new braking resistor.
Err03 Overcurrent during deceleration	Cause & Solution: 1. Ground fault or short circuit exists in the output circuit. - Check whether short-circuit occurs on motor, motor cable or contactor. 2. Acceleration time is too short. - Increase acceleration time. 3. The voltage is too low. - Adjust the voltage to normal range. 4. A load is added suddenly during deceleration. - Cancel the suddenly added load. 5. Braking unit and braking resistor are not installed. - Install the braking unit and braking resistor. 6. The braking resistor resistance is small or the braking resistor is short circuited. - Replace a new braking resistor.
Err04 Overcurrent at constant speed	Cause & Solution: 1. Ground fault or short circuit exists in the output circuit. - Check whether short-circuit occurs on the motor, motor cable or contactor 2. The voltage is too low. - Adjust the voltage to normal range. 3. A load is added suddenly during running. - Cancel the suddenly added load. 4. The rated AC drive power is low. - Replace the drive by one with higher rated power. 5. The braking resistor resistance is small or the braking resistor is short circuited. - Replace a new braking resistor.
Err05 Overvoltage during acceleration	Cause & Solution: 1. Input voltage is too high. - Adjust input voltage to normal range. 2. An external force drives motor during acceleration. - Cancel the external force. 3. Braking unit and braking resistor are not installed. - Install the braking unit and braking resistor. 4. Acceleration time is too short. - Increase acceleration time.
Err06 Overvoltage during deceleration	Cause & Solution: 1. Input voltage is too high. - Adjust input voltage to normal range. 2. An external force drives motor during deceleration. - Cancel the external force or install the braking resistor. 3. Deceleration time is too short. - Increase deceleration time. 4. Braking unit and braking resistor are not installed. - Install the braking unit and braking resistor.
Err07 Overvoltage at constant speed	Cause & Solution: 1. Input voltage is too high. - Adjust input voltage to normal range. 2. An external force drives motor during running. - Cancel the external force or install a braking resistor.
Err08 Control power fault	Cause: Input voltage is not within the permissible range. Solution: Adjust the input voltage in the permissible range.
Err09 Undervoltage	Cause & Solution: 1. An instantaneous power failure occurs. - Reset the fault 2. The AC drive's input voltage is not within the permissible range. - Adjust the voltage to normal range. 3. The bus voltage is abnormal. - Replace the AC drive. 4. The rectifier bridge, the pre-charge resistor, the drive board or the control board are abnormal. - Replace the AC drive.
Err10 Drive overload	Cause & Solution: 1. The load is too heavy or locked-rotor occurs on the motor. - Reduce the load or check motor and mechanical conditions. 2. The rated AC drive power is low. - Replace the drive by one with higher rated power.
Err11 Motor overload	Cause & Solution: 1. F9-01 (Motor overload protection gain) is set improperly. - Set F9-01 correctly. 2. The load is too heavy or locked-rotor occurs on the motor. - Reduce the load or check motor and mechanical conditions. 3. The rated AC drive power is low. - Replace the drive by one with higher rated power.
Err12 Input phase loss	Cause & Solution: 1. Three phase input is abnormal. - Eliminate faults in external circuitry 2. Drive board is abnormal. - Eliminate faults in external circuitry 3. Lightning protection board is abnormal. - There is an hardware or software issue in drive. Need to repair or replace drive. 4. Control board is abnormal. - There is an hardware or software issue in drive. Need to repair or replace drive.
Err13 Output phase loss	Cause & Solution: 1. Motor winding is damaged. Check resistance between motor cables. - Replace motor is winding is damaged. 2. The cable connecting the AC drive and the motor is abnormal. - Check for wiring errors and ensure the output cable is connected properly 3. The AC drive's three-phase outputs are unbalanced when the motor is running. - Check whether the motor three-phase winding is normal. 4. The drive board or the IGBT is abnormal. - Replace the AC drive.
Err14 IGBT overheat	Cause & Solution: 1. The ambient temperature is too high. - Lower the ambient temperature. 2. The ventilation is clogged. - Clean the ventilation. 3. The fan is damaged. - Replace the cooling fan. 4. The thermally sensitive resistor of IGBT is damaged. - Replace the AC drive. 5. The AC drive IGBT is damaged. - Replace the AC drive.
Err15 External equipment fault	Cause & Solution: 1. External fault signal is input via DI. - Confirm that the mechanical condition allows restart (F8-18) and reset the operation. 2. External fault signal is input via virtual I/O. - Confirm that the virtual I/O parameters in group A1 are set correctly and reset the operation.
Err16 Communication fault	Cause & Solution: 1. The host controller is in abnormal state. - Check the cable of the host controller. 2. Communication cable is abnormal. - Check the communication cables. 3. Communication parameters in group Fd are set improperly. - Set communication parameters in group Fd properly. 4. After all the preceding checkings are done but the fault still exists, restore the default settings.
Err18 Current detection fault	Cause: The drive board is abnormal. Solution: Replace the AC drive.
Err21 EEPROM read- write fault	Cause: EEPROM chip is damaged. Solution: Replace the AC drive.
Err23 Short circuit to ground	Cause & Solution: 1. The motor is short circuited to the ground. - Replace cable or motor. 2. The upper IGBT is damaged. - There is an hardware or software issue in drive. Need to repair or replace drive.
Err26 Accumulative running time reached	Cause: Accumulative running time reaches the setting value. Solution: Clear the record through parameter initialization.
Err27 User-defined fault 1	Cause: User-defined fault 1 is input via DI. Solution: Reset the operation.
Err28 User-defined fault 2	Cause: User-defined fault 2 is input via DI. Solution: Reset the operation.
Err29 Accumulative power-on time reached	Cause: Accumulative power-on time reaches the setting value. Solution: Clear the record through parameter initialization.
Err30 Off load fault	Cause: The output current of AC drive is smaller than F9-64 (load loss detection level). Solution: Check whether the load is disconnected or the setting of F9-64 and F9-65 (load lost detection time) satisfies actual running conditions.
Err31 PID feedback lost during running	Cause: PID feedback is smaller than the setting value of FA-26 (detection level of PID feedback loss). Solution: Check PID feedback or set FA-26 properly.
Err40 Quick current limit	Cause & Solution: 1. The load is too heavy or locked-rotor occurs on the motor. - Reduce the load or check motor and mechanical conditions. 2. The rated AC drive power is low. - Replace the drive by one with higher rated power.
Err55 Slave faulty in speed synchronous	Cause: When speed synchronous is enabled, the master receives CAN communication data but does not detect the salve. Then Err55 is reported. Solution: 1. Check the slave CAN communication cable connection. 2. Check whether CAN communication of the slave is normal.
HC Fault	Cause & Solution: 1. The cable between the drive board and control board is in poor contact. - Re-connect the 4-pin cable and 28-pin cable. 2. The control board is damaged. - Replace the AC drive. 3. The motor or motor cable is short circuited to ground. - Check whether short-circuit occurs on motor, motor cable or contactor. 4. The mains voltage is too low. - Check the power supply.

 

How to Read MD200 Faults via Keypad & Software

While the MD200 is a compact drive, accessing diagnostic data is critical for accurate troubleshooting in 2026. You can use the local keypad or the InoDriveShop PC tool.

• Fault Status Parameters: Unlike larger drives, the MD200 allows you to quickly check the drive status at the moment of the last fault directly via the keypad. Parameters U0-00 through U0-09 store the most recent fault codes and the specific frequency, current, and bus voltage at the time of the trip.
• I/O Status Check: If the fault is related to external controls (like a missing Enable signal or external fault trip), viewing the Input/Output (I/O) status parameters can confirm if a Digital Input was triggered unexpectedly.
• PC Diagnostics: By connecting the drive to a PC via the RS485 port, InoDriveShop allows you to upload parameter sets and compare them against factory defaults to identify configuration errors that may be causing nuisance tripping.

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Frequently Asked Questions (FAQ)

Q: What is the difference between an Alarm and a Fault?

A: An Alarm (often indicated by specific blinking patterns or ‘A’ codes) suggests a parameter limit is being reached (like current limit), but the drive continues to modulate. A Fault (indicated by ‘Err’ codes) immediately shuts off the output to the motor to prevent hardware damage.

Q: How do I reset an Inovance MD200 fault?

A: You can reset the drive using the following methods:

1. Pressing the red STOP/RESET button on the keypad.
2. Activating a Digital Input (DI) terminal configured for the Reset function (Function 9).
3. Power cycling the drive (turning it off and on again) for severe hardware faults.

Q: Where is the fault history stored?

A: The MD200 stores the last three fault codes in parameters U0-00 (latest), U0-01, and U0-02. You can navigate to these parameters using the PRG/ESC and Up/Down arrows on the keypad.