Inovance MD800, MD500 & MD880 Drive
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May 10, 2025 5:00 am
Inovance MD800 Drive fault codes : Find a comprehensive list of Inovance MD800 series drive fault codes and their meanings. Quickly diagnose issues and troubleshoot your MD800 VFD for efficient maintenance and minimal downtime.
Inovance MD800 Drive fault codes
Below list shows Inovance MD800 Drive fault codes:
| Fault Name | Panel | Possible Cause | Solution |
| Display | |||
| Overcurrent during acceleration | E02.04 | 1. A grounding fault or short circuit exists in the output circuit of the AC drive. | 1. Check the motor and the relay contactor and make sure that they are not short‑ circuited. |
| 2. The SVC control mode is adopted, and motor auto‑ tuning is not performed. | 2. Set the motor parameters according to the motor nameplate and perform motor auto‑tuning. | ||
| 3. The set acceleration time is too short. | 3. Increase the acceleration time (F0‑17). | ||
| 4. The overcurrent stall suppression setting is improper. | 4. Ensure that overcurrent stall suppression (F3‑19) is enabled.The overcurrent stall action current (F3‑18) is too high. Adjust it to a value between 120% and 160%.The overcurrent stall suppression gain (F3‑20) is too low. Adjust it to a value between 20 and 40. | ||
| 5. The customized torque boost or V/f curve is improper. | 5. Adjust the customized torque boost or V/f curve. | ||
| 6. The motor is started while rotating. | 6. Enable the flying start function or start the AC drive after the motor stops. | ||
| 7. The AC drive suffers external interference. | 7. Check whether the fault current reaches the overcurrent stall suppression current (F3‑18) by viewing the fault log. If not, the fault is possibly caused by external interference. In this case, find out the external interference source and rectify the fault.If no external interference source is found, the drive board or Hall device may be faulty. In this case, contact the manufacturer for replacement. | ||
| Overcurrent during deceleration | E03.04 | 1. A grounding fault or short circuit exists in the output circuit of the AC drive. | 1. Check the motor and make sure that the motor is not short‑circuited or open‑ circuited. |
| 2. The SVC control mode is adopted, and motor auto‑ tuning is not performed. | 2. Set the motor parameters according to the motor nameplate and perform motor auto‑tuning. | ||
| 3. The set deceleration time is too short. | 3. Increase the deceleration time (F0‑18). | ||
| 4. The overcurrent stall suppression setting is improper. | 4. Ensure that overcurrent stall suppression (F3‑19) is enabled.The overcurrent stall action current (F3‑18) is too high. Adjust it to a value between 120% and 150%.The overcurrent stall suppression gain (F3‑20) is too low. Adjust it to a value between 20 and 40. | ||
| 5. The power supply unit is not provided with a braking unit and no braking resistor is installed. | 5. Replace the power supply unit with one that has a braking unit and install a braking resistor. | ||
| 6. The AC drive suffers external interference. | 6. Check whether the fault current reaches the overcurrent stall suppression current (F3‑18) by viewing the fault log. If not, the fault is possibly caused by external interference. In this case, find out the external interference source and rectify the fault.If no external interference source is found, the drive board or Hall device may be faulty. In this case, contact the manufacturer for replacement. | ||
| Overcurrent at constant speed | E04.04 | 1. A grounding fault or short circuit exists in the output circuit of the AC drive. | 1. Check the motor and make sure that the motor is not short‑circuited or open‑ circuited. |
| 2. The SVC control mode is adopted, and motor auto‑ tuning is not performed. | 2. Set the motor parameters according to the motor nameplate and perform motor auto‑tuning. | ||
| 3. The overcurrent stall suppression setting is improper. | 3. Ensure that overcurrent stall suppression (F3‑19) is enabled.The overcurrent stall action current (F3‑18) is too high. Adjust it to a value between 120% and 150%.The overcurrent stall suppression gain (F3‑20) is too low. Adjust it to a value between 20 and 40. | ||
| 4. The AC drive power rating is too low. | 4. During stable running, if the running current exceeds the rated motor current or rated output current of the AC drive, replace the AC drive with one of higher power rating. | ||
| 5. The AC drive suffers external interference. | 5. Check whether the fault current reaches the overcurrent stall suppression current (F3‑18) by viewing the fault log. If not, the fault is possibly caused by external interference. In this case, find out the external interference source and rectify the fault.If no external interference source is found, the drive board or Hall device may be faulty. In this case, contact the manufacturer for replacement. | ||
| Overvoltage during acceleration | E05.00 | The input grid voltage is | Adjust the input grid voltage to the normal |
| too high. | range. | ||
| An external force drives the motor during acceleration. | Cancel the external force or install a braking resistor. | ||
| The maximum rise frequency during overvoltage stall suppression (F3‑26) is too low. Adjust it to a value between 5 Hz and | |||
| 15 Hz when an external force is applied. | |||
| The overvoltage stall suppression parameters are set improperly. | Ensure that the overvoltage stall suppression function (F3‑23) is enabled. The overvoltage stall suppression voltage (F3‑22) is too high. Adjust it to a value between 700 V and 770 V. | ||
| The overvoltage stall suppression frequency gain (F3‑24) is too low. Adjust it to a value | |||
| between 30 and 50. | |||
| The power supply unit is not provided with a braking unit and no braking resistor is | Replace the power supply unit with one that has a braking unit and install a braking resistor. | ||
| installed. | |||
| The acceleration time is | Increase the acceleration time (F0‑17). | ||
| too short. | |||
| Overvoltage during deceleration | E06.00 | The overvoltage stall suppression parameters are set improperly. | Ensure that the overvoltage stall suppression function (F3‑23) is enabled. The overvoltage stall suppression voltage (F3‑22) is too high. Adjust it to a value between 700 V and 770 V. |
| The overvoltage stall suppression frequency gain (F3‑24) is too low. Adjust it to a value | |||
| between 30 and 50. | |||
| An external force drives the motor during deceleration. | Cancel the external force or install a braking resistor. | ||
| The maximum rise frequency during overvoltage stall suppression (F3‑26) is too low. Adjust it to a value between 5 Hz and | |||
| 15 Hz when an external force is applied. | |||
| The deceleration time is | Increase the deceleration time (F0‑18). | ||
| too short. | |||
| The power supply unit is not provided with a braking unit and no braking resistor is | Replace the power supply unit with one that has a braking unit and install a braking resistor. | ||
| installed. | |||
| Overvoltage at constant speed | E07.00 | The overvoltage stall suppression parameters are set improperly. | Ensure that the overvoltage stall suppression function (F3‑23) is enabled. The overvoltage stall suppression voltage (F3‑22) is too high. Adjust it to a value between 700 V and 770 V. |
| The overvoltage stall suppression frequency | |||
| gain (F3‑24) is too low. Adjust it to a value between 30 and 50. | |||
| An external force drives the motor during running. | Cancel the external force or install a braking resistor. | ||
| The maximum rise frequency during overvoltage stall suppression (F3‑26) is too low. Adjust it to a value between 5 Hz and | |||
| 15 Hz when an external force is applied. | |||
| E07.01 | The bus voltage of the single‑phase AC drive is | Check whether the bus voltage of the single‑ phase AC drive exceeds 410.0 V. | |
| too high. | |||
| Undervoltage | E09.00 | An instantaneous power | Enable the power dip ride‑through function |
| failure occurs. | (F9‑63). | ||
| The input voltage of the | Adjust the input voltage of the AC drive to the normal range. | ||
| AC drive is beyond the specified range. | |||
| The bus voltage is | Contact the technical support personnel. | ||
| abnormal. | |||
| The power supply unit, the drive board of the drive unit, or the control board of the drive unit | Contact the technical support personnel. | ||
| is abnormal. | |||
| AC drive overload | E10.00 | The load is too heavy or | Reduce the load and check the motor and |
| motor stalling occurs. | mechanical conditions. | ||
| The AC drive power | Replace the AC drive with one of higher | ||
| rating is too low. | power rating. | ||
| The SVC control mode is adopted, and motor auto‑tuning is not | Set the motor parameters according to the motor nameplate and perform motor auto‑ tuning. | ||
| performed. | |||
| The control mode is V/f control. | Reduce the torque boost (F3‑01) reference in decrements of 1.0%, or set it to 0 (auto | ||
| torque boost). | |||
| Motor overload | E11.00 | F9‑01 (motor overload protection gain) is set | Set F9‑01 correctly. Increase its value to prolong the motor overload time. |
| improperly. | |||
| The load is too heavy or | Reduce the load and check the motor and | ||
| motor stalling occurs. | mechanical conditions. | ||
| Input voltage exception | E12.01 | Input voltage phase loss | Check the three‑phase power supply and make sure that it is normal. |
| Check the input cables and make sure that they are not broken. | |||
| Check the input terminals and make sure | |||
| that they are properly connected. | |||
| E12.04 | The input three‑phase voltage is too high. | Ensure that the input voltage does not exceed the rated value: | |
| Three‑phase 380 V models: 576 V | |||
| Single‑phase 220 V models: 288 V | |||
| Output phase loss | E13.00 | The motor is faulty. | Check the motor for open circuit. |
| The cable connecting the AC drive and the | Check the cable between the AC drive and the motor. | ||
| motor is abnormal. | |||
| The three‑phase outputs of the AC drive are unbalanced when | Check whether the motor three‑phase winding is normal. If not, eliminate the fault. | ||
| the motor is running. | |||
| The drive board or the | Contact the technical support personnel. | ||
| IGBT is abnormal. | |||
| IGBT overheat | E14.00 | The ambient | Lower the ambient temperature. |
| temperature is too high. | |||
| The air filter is blocked. | Clean the air filter. | ||
| The fan is damaged. | Replace the fan. | ||
| The thermistor of the | Contact the technical support personnel. | ||
| IGBT is damaged. | |||
| The IGBT is damaged. | Contact the technical support personnel. | ||
| External device fault | E15.01 | An external fault signal | Eliminate the external fault, ensure that the |
| is input through multi‑ functional DI (NO). | mechanical condition allows restart (F8‑21), and reset the operation. | ||
| E15.02 | An external fault signal | Eliminate the external fault, ensure that the | |
| is input through the multi‑functional DI (NC). | mechanical condition allows restart (F8‑21), and reset the operation. | ||
| Communication fault | E16.01 | Modbus communication timeout | Check whether the Modbus master sends data within the set timeout period. |
| Check whether the RS485 circuit is | |||
| disconnected or suffers interference. | |||
| A16.02 | The protective cover for the connector is not installed. | Install the protective cover on the connector of the rightmost drive unit. | |
| E16.03 | Station number allocation fails. | Power on all equipment. If the fault persists, replace the AC drive. | |
| E16.04 | Continuous frame loss occurs on the extension card. | Ensure that the extension card is connected properly. | |
| Check whether F9‑67 is set too low. | |||
| E16.11 | CANopen communication timeout | EtherCAT is disconnected. Make sure that the CAN communication cable is connected properly. | |
| Check parameters Fd‑15 to Fd‑17 to | |||
| eliminate possible interference. | |||
| E16.12 | The PDO mapping configured by CANopen is inconsistent with the actual communication | The EtherCAT mapping is inconsistent with the PDO mapping. Check the PDO mapping parameters in group AF to make sure that the PDO configuration is correct. | |
| mapping. | |||
| E16.13 | Data exchange from the | Check whether the power supply unit works | |
| power supply unit to the drive unit times out. | properly. If the power supply unit is faulty, contact the technical support personnel. | ||
| E16.14 | Data exchange from the power supply unit to the drive unit is | The power supply unit is faulty. Contact the technical support personnel. | |
| abnormal. | |||
| E16.21 | CANlink heartbeat times out. | Check that the CAN communication cable is correctly connected. | |
| Check parameters Fd‑15 to Fd‑17 to | |||
| eliminate possible interference. | |||
| E16.22 | A CANlink station number conflict occurs. | Change duplicate CAN station numbers in the network to different ones by using Fd‑ 13. | |
| E16.52 | The EEPROM of the EtherCAT communication card is faulty. | 1. If the programming or upgrading of the communication card fails, program the communication card again. | |
| 2. If this fault occurs during normal use, replace the communication card. | |||
| E16.53 | The slave control chip of the EtherCAT communication card is faulty. | 1. If the programming or upgrading of the communication card fails, program the communication card again. | |
| 2. If this fault occurs during normal use, replace the communication card. | |||
| E16.55 | The EtherCAT system parameters are incorrect. | When the master station goes wrong, check | |
| w‑h3e6th‑er it sends the sync frame (FD‑78). If not, make sure that TPDO and RPDO have | |||
| been configured for the master PDO. If the | |||
| Motor auto‑ tuning fault | E19.02 E19.04 | Auto‑tuning on the synchronous motor magnetic pole position | Check whether the motor is disconnected or output phase loss occurs. |
| angle fails. | |||
| E19.05 | Auto‑tuning on the synchronous motor magnetic pole initial | Increase the synchronous motor initial position angle detection current (F2‑29). | |
| position angle fails. | |||
| E19.06 E19.07 E19.08 | Auto‑tuning on the stator resistance fails. | Ensure that the motor is connected properly. | |
| Ensure that the rated motor current (F1‑03) | |||
| is set according to the motor nameplate. | |||
| E19.09 E19.10 | Auto‑tuning on the asynchronous motor transient leakage | The motor is not connected or output phase loss occurs. Ensure that the motor is connected properly or the motor is | |
| inductance fails. | disconnected from the load. | ||
| E19.12 | The auto‑tuning times out. | The motor is not connected or output phase loss occurs. Ensure that the motor is connected properly or the motor is disconnected from the load. | |
| E19.13 | |||
| E19.14 | |||
| E19.15 | |||
| E19.16 | |||
| E19.17 | |||
| E19.19 | |||
| E19.20 | Auto‑tuning on the zero position angle of the no‑load synchronous | Check the Z feedback signal. | |
| E19.22 | motor times out. | ||
| E19.23 | Auto‑tuning on the synchronous motor pole position fails. | Ensure that the rated motor current (F1‑03) is set according to the motor nameplate. | |
| Decrease the synchronous motor initial | |||
| position angle detection current (F2‑29). | |||
| E19.24 | Auto‑tuning on the asynchronous motor transient leakage | The AC drive power rating is too low. Select an AC drive of proper power rating according to the motor power. | |
| inductance fails. | |||
| EEPROM read‑ write fault | E21.01 | EEPROM read‑write is abnormal. | For parameters written to EEPROM through communication, check the RAM addresses of the parameters. For the RAM address mapping of parameters, see "Parameter Address Rules". |
| If the EEPROM chip is damaged, contact the manufacturer to replace the main control | |||
| board. | |||
| Motor auto‑ tuning error | E22.00 | The stator resistance obtained through auto‑ tuning exceeds the | Check whether the rated motor voltage and current are correctly set, and set F1‑02 (rated motor voltage) and F1‑03 (rated motor current) according to the motor nameplate. |
| allowed range. | Perform auto‑tuning after the motor stops. | ||
| E22.01 | The rotor resistance of the asynchronous motor obtained through auto‑tuning exceeds the | ||
| allowed range. | |||
| E22.02 | The no‑load current and mutual inductance of the asynchronous motor obtained through auto‑tuning exceed the allowed range. If such an alarm is generated, the AC drive calculates no‑load current and mutual inductance based on known parameters, which may be different from the | Set motor parameters in group F1 according to the motor nameplate. | |
| optimal values. | Before auto‑tuning, ensure that the motor has no load. | ||
| E22.03 | The back EMF of the synchronous motor obtained through auto‑ tuning exceeds the | Ensure that the rated motor voltage (F1‑02) is set according to the motor nameplate. | |
| allowed range. | Before auto‑tuning, ensure that the motor has no load. | ||
| Short circuit to ground | E23.00 | The motor is short | Check the motor cables and motor for short circuit to ground. |
| circuited to the ground. | |||
| E23.01 | A hardware overcurrent fault occurs during short‑to‑ground detection upon power‑ | ||
| on. | |||
| E23.02 | A hardware overvoltage fault occurs during short‑to‑ground detection upon power‑ | ||
| on. | |||
| E23.03 | A great risk is detected during short‑to‑ground detection upon power‑ | ||
| on. | |||
| E23.04 | A lower bridge overcurrent fault occurs during short‑to‑ground detection before | ||
| startup. | |||
| E23.05 | A bus overcurrent fault occurs during short‑to‑ ground detection before | ||
| startup. | |||
| E23.06 | A lower bridge and bus overcurrent fault occurs during short‑to‑ground detection before | ||
| startup. | |||
| Power supply unit fault | E25.00 | The power supply unit is faulty. | Eliminate the power supply unit faults, such as input phase loss and overtemperature. Check the terminal configuration of the power supply unit. If any one of the following functions is selected, a fault is reported when there is no feedback signal: 1: Operation enable |
| 2: Incoming circuit breaker feedback | |||
| 3: Auxiliary circuit breaker feedback | |||
| 4: Residual current device feedback If any one of the following functions is selected, a fault is reported when the terminal is active: | |||
| 6: Drive unit running prohibited | |||
| 7: Drive unit coast‑to‑stop | |||
| 8: Drive unit stop according to the preset mode | |||
| Accumulative | E26.00 | The accumulative | Clear the record through parameter initialization. |
| running time reach | running time reaches the reference. | ||
| User‑defined fault 1 | E27.00 | The signal of user‑ defined fault 1 is input through the multi‑ functional DI terminal. The signal of user‑ defined fault 1 is input | Reset. |
| through virtual I/O. | |||
| User‑defined fault 2 | E28.00 | The signal of user‑ defined fault 2 is input through the multi‑ functional DI terminal. The signal of user‑ defined fault 2 is input | Reset. |
| through virtual I/O. | |||
| Accumulative | E29.00 | The accumulative | Clear the record through parameter initialization. |
| power‑on time reach | power‑on time reaches the reference. | ||
| Load loss | E30.00 | The running current of | Check whether the load is disconnected or |
| the AC drive is lower than that set by F9‑68. | the setting of F9‑68 and F9‑69 satisfies actual running conditions. | ||
| PID feedback loss during | E31.00 | The PID feedback is lower than that set by | Check the PID feedback signal or set FA‑26 properly. |
| running | FA‑26. | ||
| Local parameter backup failure | E32.00 | An exception occurs | Check whether the backed‑up drive unit |
| during local parameter backup. | station numbers exceeds the quantity of drive units installed. | ||
| Excessive speed deviation | E42.00 | Motor auto‑tuning is not | Perform motor auto‑tuning. |
| performed. | |||
| F9‑73 and F9‑74 are set | Set F9‑73 and F9‑74 correctly based on | ||
| incorrectly. | actual conditions. | ||
| Motor overtempera ture | E45.00 | The temperature sensor is connected loosely. | Check the temperature sensor connection. Re‑connect the temperature sensor if |
| necessary. | |||
| The motor temperature is too high. | Increase the carrier frequency or take other heat dissipation measures to cool the | ||
| motor. | |||
| The motor overtemperature protection thresholds (F9‑57, F9‑59, and F9‑ | Increase the motor overtemperature protection thresholds (90°C to 100°C for common motors). | ||
| 61) are too low. | |||
| STO fault | STO | STO1 and STO2 signals | Check the wiring of STO1 and STO2. |
| are disconnected simultaneously. | |||
| E47.02 | STO1 and STO2 signals are disconnected | Check the wiring of STO1 and STO2. | |
| separately. | |||
| E47.03 | Undervoltage or | Contact the technical support personnel. | |
| overvoltage occurs on the STO circuit. | |||
| E47.04 | The STO circuit input | Contact the technical support personnel. | |
| subsystem is abnormal. | |||
| E47.05 | The STO blocking | Contact the technical support personnel. | |
| output chip is abnormal. | |||
| Braking unit fault | E61.01 | The braking transistor is short‑circuited at stop. | Check whether the resistance and power of the braking resistor are too low. |
| Check whether the braking resistor is short‑ | |||
| circuited. | |||
| E61.02 | Braking transistor open | Contact the technical support personnel. | |
| circuit occurs. | |||
| E61.03 | The braking transistor is short‑circuited during running. | Check whether the resistance and power of the braking resistor are too low. | |
| Check whether the braking resistor is short‑ | |||
| circuited. | |||
| Fan fault | E80.00 | The fan is faulty. | Ensure that the fan on the drive unit is connected properly. |
| Ensure that the fan rotates freely. | |||
| Hardware I/O resource loss | A99.01 | The selected DI hardware resource does not exist. | Ensure that the power supply unit and extension cards are firmly installed. |
| Check parameters F4‑00 to F4‑15 of the | |||
| drive unit to ensure that no non‑existing DI hardware resource is selected. | |||
| A99.02 | The selected DO/RO hardware resource does not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check the DO/RO hardware resources of the drive unit to ensure that no non‑existing | |||
| DO/RO hardware resource is selected. | |||
| A99.03 | The selected AI hardware resource does not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check parameters F4‑25 to F4‑29 of the drive unit to ensure that no non‑existing AI | |||
| hardware resource is selected. | |||
| A99.04 | The selected DI and DO/ RO hardware resources do not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check the drive unit according to the | |||
| solutions to A99.01 and A99.02. | |||
| A99.05 | The selected DI and AI hardware resources do not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check the drive units according to the troubleshooting measures for A99.01 and | |||
| A99.03. | |||
| A99.06 | The selected DO/RO and AI hardware resources do not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check the drive units according to the | |||
| troubleshooting measures for A99.02 and A99.03. | |||
| A99.07 | The selected DI, DO/RO, and AI hardware resources do not exist. | Ensure that the power supply unit and extension cards are firmly installed. | |
| Check the drive unit according to the | |||
| solutions to A99.01, A99.02, and A99.03. |
With the help of above list you can easily find the meaning of fault codes, cause of fault and their solutions.
