Do as the following after the VFD fault:
1. Check to ensure there is nothing wrong with the keypad. If not, please contact the local INVT office.
2. If there is nothing wrong, please check P07 and ensure the corresponding recorded fault parameters to confirm the real state when the current fault occurs by all parameters.
3. See the following table for detailed solution and check the corresponding abnormal state.
4. Eliminate the fault and ask for related help.
5. Check to eliminate the fault and carry out fault reset to run the VFD.
Code | Fault | Cause | Solution |
OUt1 | IGBT U phase protection | lThe acceleration is too fast lThere is damage to the internal to IGBT of the phase lThe connection of the driving wires is not good lThe grounding is not good | l Increase acc. time l Change the power unit l Check the driving wires l Check if there is strong interference to the external equipment |
OUt2 | IGBT V phase protection | ||
OUt3 | IGBT W phase protection | ||
OC1 | Accelerating overcurrent | lThe acceleration or deceleration is too fast lThe voltage of the grid is too low lThe power of the VFD is too low lThe load transients or is abnormal lThe grounding is short circuited or the output is phase loss lThere is strong external interference lThe overvoltage stall protection is not open | lIncrease the acc. time lCheck the input power lSelect the VFD with a larger power lCheck if the load is short circuited (the grounding short circuited or the wire short circuited) or the rotation is not smooth lCheck the output configuration. lCheck if there is strong interference lCheck the setting of related function codes |
OC2 | Decelerating overcurrent | ||
OC3 | Constant overcurrent | ||
OV1 | Accelerating overvoltage | lThe input voltage is abnormal lThere is large energy feedback lNo braking components lBraking energy is not open | lCheck the input power lCheck if the DEC time of the load is too short or the VFD starts during the rotation of the motor or it needs to increase the energy consumption components lInstall the braking components lCheck the setting of related function codes |
OV2 | Decelerating overvoltage | ||
OV3 | Constant overvoltage | ||
UV | Bus undervoltage fault | lThe voltage of the power supply is too low lThe overvoltage stall protection is not open | lCheck the input power of the supply line lCheck the setting of related function codes |
OL1 | Motor overload | lThe voltage of the power supply is too low lThe motor setting rated current is incorrect lThe motor stall or load transients is too strong | lCheck the power of the supply line lReset the rated current of the motor lCheck the load and adjust the torque lift |
OL2 | VFD overload | lThe acceleration is too fast lReset the rotating motor lThe voltage of the power supply is too low. lThe load is too heavy. lClose loop vector control, reverse direction of the code panel and long low-speed operation | lIncrease the ACC time lAvoid the restarting after stopping. lCheck the power of the supply line lSelect a VFD with bigger power. lSelect a proper motor. |
OL3 | Electrical overload | lThe VFD will report overload pre-alarm according to the set value. | lCheck the load and the overload pre-alarm point. |
SPI | Input phase loss | lPhase loss or fluctuation of input R, S, T | lCheck input power lCheck installation distribution |
SPO | Output phase loss | lU, V, W phase loss input (or serious asymmetrical three phase of the load) | lCheck the output distribution lCheck the motor and cable |
OH1 | Rectifying module overheated | lAir duct jam or fan damage lAmbient temperature is too high. lThe time of overload running is too long. | lRefer to the overcurrent solution lRedistribute dredge the wind channel or change the fan lLow the ambient temperature lCheck and reconnect lChange the power lChange the power unit lChange the main control panel |
OH2 | IGBT overheated | ||
EF | External fault | lSI external fault input terminals action | lCheck the external device input |
CE | 485 communication fault | lThe baud rate setting is incorrect. lFault occurs to the communication wiring. lThe communication address is wrong. lThere is strong interference to the communication. | lSet proper baud rate lCheck the communication connection distribution lSet proper communication address. lChang or replace the connection distribution or improve the anti-interference capability. |
ItE | Current-detecting fault | lThe connection of the control board is not good lAssistant power is bad lHall components is broken lThe modifying circuit is abnormal. | lCheck the connector and re-plug lChange the hall lChange the main control panel |
tE | Motor-autotuning fault | lThe motor capacity does not comply with the VFD capability lThe rated parameter of the motor does not set correctly. lThe offset between the parameters from autotune and the standard parameter is huge lAutotune overtime | lChange the VFD mode lSet the rated parameter according to the motor name plate lEmpty the motor load and re-identify lCheck the motor connection and set the parameter. lCheck if the upper limit frequency is above 2/3 of the rated frequency. |
EEP | EEPROM operation fault | lError of controlling the write and read of the parameters lDamage to EEPROM | lPress STOP/RST to reset lChange the main control panel |
PIDE | PID feedback outline fault | lPID feedback offline lPID feedback source disappear | lCheck the PID feedback signal lCheck the PID feedback source |
bCE | Braking unit fault | lBraking circuit fault or damage to the braking pipes lThe external braking resistor is not sufficient | lCheck the braking unit and, change new braking pipe lIncrease the braking resistor |
ETH1 | Grounding shortcut fault 1 | lThe output of the VFD is short circuited with the ground. lThere is fault in the current detection circuit. | lCheck if the connection of the motor is normal or not lChange the hall lChange the main control panel |
ETH2 | Grounding shortcut fault 2 | lThe output of the VFD is short circuited with the ground. lThere is fault in the current detection circuit. lThere is a great difference between the actual motor power setting and the VFD power | lCheck if the connection of the motor is normal or not lChange the hall lReset the correct motor parameter |
dEu | Speed deviation fault | lThe load is too heavy or stalled. | lCheck the load and ensure it is normal. Increase the detection time. lCheck whether the control parameters are normal. |
STo | Maladjustment fault | lThe control parameters of the synchronous motors not set properly. lThe autotune parameter is not right. lThe VFD is not connected to the motor. | lCheck the load and ensure it is normal. lCheck whether the control parameter is set properly or not. lIncrease the maladjustment detection time. |
END | Running time arrival | lThe actual running time of the VFD is above the internal setting running time. | lAsk for the supplier and adjust the setting running time. |
PCE | Keypad communication fault | lThe connection of the keypad wires is not good or broken. lThe keypad wire is too long and affected by strong interference. lThere is circuit fault on the communication of the keypad and main board. | lCheck the keypad wires and ensure whether there is mistake. lCheck the environment and avoid the interference source. lChange the hardware and ask for service. |
UPE | Parameters uploading fault | lThe connection of the keypad wires is not good or broken. lThe keypad wire is too long and affected by strong interference. lCommunication fault. | lCheck the keypad wires and ensure whether there is mistake. lChange the hardware and ask for service. lChange the hardware and ask for service. |
DNE | Parameters downloading fault | lThe connection of the keypad wires is not good or broken. lThe keypad wire is too long and affected by strong interference. lThere is mistake on the data storage of the keypad. | lCheck the keypad wires and ensure whether there is mistake. lChange the hardware and ask for service. lRepack-up the data in the keypad. |
LL | Electronic underload fault | lThe VFD will report the underload pre-alarm according to the set value. | lCheck the load and the underload pre-alarm point. |
E-DP | PROFIBUS/CANOPEN communication fault | lCommunication address is not correct. lCorresponding resistor is not dialed lThe files of main stop GSD does not set sound | lCheck related setting |
E-NET | Ethernet communication fault | lThe Ethernet address is not set right. lThe Ethernet communication is not selected to right. lThe ambient interference is too strong. | lCheck the related setting. Check the communication method selection. lCheck the environment and avoid the interference. |
E-CAN | CANopen communication fault | lThe connection is not sound lCorresponding resistor is not dialed lThe communication is uneven | lCheck the connection lDraw out the correspond resistor lSet the same baud rate |