INVT GD800 Pro Series Drive

INVT GD800 Pro Series Drive Fault Codes:

Fault Code and MeaningCause and Remedy
ov1
Overvoltage during acceleration
Cause: Exception occurred to input voltage; Large energy feedback.



Remedy:

  • Check the input power.

  • Check whether load DEC time is too short.

  • Check if the motor starts during rotating.

  • Check if additional dynamic brake components are required.
ov2
Overvoltage during deceleration
Cause: Exception occurred to input voltage; Large energy feedback.



Remedy:

  • Check the input power.

  • Check whether load DEC time is too short.

  • Check if the motor starts during rotating.

  • Check if additional dynamic brake components are required.
ov3
Overvoltage during constant speed running
Cause: Exception occurred to input voltage; Large energy feedback.



Remedy:

  • Check the input power.

  • Check whether load DEC time is too short.

  • Check if the motor starts during rotating.

  • Check if additional dynamic brake components are required.
oC1
Overcurrent during acceleration
Cause: ACC/DEC is too fast; The voltage of the grid is too low; VFD power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference sources.



Remedy:

  • Increase ACC/DEC time.

  • Check the input power.

  • Select the VFD with larger power.

  • Check whether the load is short circuited (to-ground short circuit or line-to-line short circuit) or the rotation is not smooth.

  • Check the output wiring.

  • Check if there is strong interference.
oC2
Overcurrent during deceleration
Cause: ACC/DEC is too fast; The voltage of the grid is too low; VFD power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference sources.



Remedy:

  • Increase ACC/DEC time.

  • Check the input power.

  • Select the VFD with larger power.

  • Check whether the load is short circuited (to-ground short circuit or line-to-line short circuit) or the rotation is not smooth.

  • Check the output wiring.

  • Check if there is strong interference.
oC3
Overcurrent during constant speed running
Cause: ACC/DEC is too fast; The voltage of the grid is too low; VFD power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference sources.



Remedy:

  • Increase ACC/DEC time.

  • Check the input power.

  • Select the VFD with larger power.

  • Check whether the load is short circuited (to-ground short circuit or line-to-line short circuit) or the rotation is not smooth.

  • Check the output wiring.

  • Check if there is strong interference.
Lv
Bus undervoltage fault
Cause: The voltage of the grid is too low.



Remedy:

  • Check the grid input power.
oL1
Motor overload
Cause: The grid voltage is too low; The motor rated current is set incorrectly; The motor stall occurs or the load transient is too large.



Remedy:

  • Check the grid voltage.

  • Reset the motor rated current.

  • Check the load and adjust the torque boost quantity.
oL2
VFD overload
Cause: ACC is too fast; The motor in rotating is restarted; The grid voltage is too low; Load is too large.



Remedy:

  • Increase ACC time.

  • Avoid restart after stop.

  • Check the grid voltage.

  • Select the VFD with larger power.

  • Select a proper motor.
SPI
Input phase loss
Cause: Phase loss or violent fluctuation occurred on input R, S, T.



Remedy:

  • Check the input power.

  • Check the installation wiring.
SPo
Phase loss on output side
Cause: Phase loss occurred to U, V, W output (or the three phases of motor is asymmetrical).



Remedy:

  • Check the output wiring.

  • Check the motor and cable.
EF
External fault
Cause: SI external faulty input terminal action.



Remedy:

  • Check external device input.
E_485
RS485 communication fault
Cause: Baud rate is set improperly; Communication line fault; Incorrect communication address; Communication suffers from strong interference.



Remedy:

  • Set proper baud rate.

  • Check the wiring of communication interfaces.

  • Set the communication address correctly.

  • Replace or change the wiring to enhance the anti-interference capacity.
ItE
Current detection fault
Cause: Poor contact of the connector of control board; Hall component is damaged; Exception occurred to amplification circuit.



Remedy:

  • Check the connector and re-plug.

  • Replace the hall component.

  • Replace the main control board.
tE
Motor-autotuning fault
Cause: The motor capacity does not match the VFD capacity; Motor parameter is set improperly; The parameters gained from autotuning deviate sharply from the standard parameters; Autotuning timeout.



Remedy:

  • Change the VFD model.

  • Set proper motor type and nameplate parameters.

  • Empty the motor load and carry out autotuning again.

  • Check the motor wiring and parameter setup.

  • Check whether the upper limit frequency is larger than 2/3 of the rated frequency.
EEP
EEPROM operation error
Cause: Error in reading or writing control parameters; EEPROM is damaged.



Remedy:

  • Press STOP/RST for reset.

  • Change the main control board.
PIdE
PID feedback offline fault
Cause: PID feedback offline; PID feedback source disappears.



Remedy:

  • Check PID feedback signal wires.

  • Check PID feedback source.
bCE
Braking unit fault
Cause: Fault occurred to the brake circuit or the braking pipe is damaged; Resistance of the external braking resistor is small.



Remedy:

  • Check the braking unit, and replace with new braking pipe.

  • Increase the brake resistance.
ENd
Running time reached
Cause: The actual running time of the VFD is longer than the internal set running time.



Remedy:

  • Ask for the supplier and adjust the set running time.
oL3
Electronic overload fault
Cause: The VFD reports overload pre-alarm according to the setting.



Remedy:

  • Check the load and the overload pre-alarm points.
PCE
Keypad communication fault
Cause: Keypad cable connected improperly or disconnected; Keypad cable too long, causing strong interference; Keypad or mainboard communication circuit error.



Remedy:

  • Check the keypad cable to determine whether a fault occurs.

  • Check for and remove the external interference source.

  • Replace the hardware and seek maintenance services.
UPE
Parameter upload error
Cause: Keypad cable connected improperly or disconnected; Keypad cable too long, causing strong interference; Keypad or mainboard communication circuit error.



Remedy:

  • Check for and remove the external interference source.

  • Replace the hardware and seek maintenance services.
dNE
Parameter download error
Cause: Keypad cable connected improperly or disconnected; Keypad cable too long, causing strong interference; Data storage error occurred to the keypad.



Remedy:

  • Check for and remove the external interference source.

  • Replace the hardware and seek maintenance services.

  • Re-back up the data on the keypad.
E_dP
PROFIBUS communication fault
Cause: Communication address is not correct; The matching resistance is not set well; The master GSD file is not set up; The peripheral interference is too large.



Remedy:

  • Check the related settings.

  • Check the surrounding environment, and eliminate interference effects.
E_NEt
Ethernet communication fault
Cause: The address of Ethernet is set improperly; The communication mode is set improperly; The peripheral interference is too large.



Remedy:

  • Check the related settings.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
E_CAN
CANopen communication fault
Cause: Line contact is poor; The matching resistor is not switched on; Communication baud rates do not match; The peripheral interference is too large.



Remedy:

  • Check the line: switch on the matching resistor.

  • Set the same baud rate.

  • Check the surrounding environment, and eliminate interference effects.
EtH1
To-ground short-circuit fault 1
Cause: The output of the VFD is short circuited to the ground; There is a fault in the current detection circuit.



Remedy:

  • Check whether the motor wiring is normal.

  • Replace the hall component.

  • Replace the main control board.
dEU
Speed deviation fault
Cause: The load is too heavy or stalled.



Remedy:

  • Check the load to ensure it is proper, and increase the detection time.

  • Check whether the control parameters are set properly.
STE
Mal-adjustment fault
Cause: SM control parameters are set incorrectly; Autotuned parameters are not accurate; The VFD is not connected to the motor.



Remedy:

  • Check the load and ensure the load is normal.

  • Check whether control parameters are set correctly.

  • Increase the mal-adjustment detection time.
LL
Underload fault
Cause: The VFD reports underload pre-alarm according to the setting.



Remedy:

  • Check the load and the underload pre-alarm points.
ENCIo
Encoder offline fault
Cause: In closed-loop vector control, the encoder signal cables is disconnected; Encoder is damaged.



Remedy:

  • Check the encoder wiring and re-connect the cables.

  • Check for encoder output.
ENCId
Encoder reversal fault
Cause: In closed-loop vector control, the encoder is disconnected or damaged; VFD wiring is improper.



Remedy:

  • Check the encoder wiring and adjust the wiring.
E_STo
STO fault
Cause: STO terminal is disconnected.



Remedy:

  • Check the external controller.
FAE
Brake action fault
Cause: Brake feedback action error.



Remedy:

  • Check the external contactor.
E_ASC
Master/slave communication fault
Cause: The address is set improperly; The communication mode is set improperly; The communication cable is not connected properly.



Remedy:

  • Check the related settings.

  • Check the communication mode selection.

  • Check the wiring and adjust the wiring.
E_SLE
Slave fault
Cause: Fault occurring to the slave.



Remedy:

  • Check slave settings and ambient environment.
dF_CE
DSP-FPGA communication fault
Cause: DSP-FPGA communication fault occurred; Control board is faulty.



Remedy:

  • Ask for service.
CPoE
Control power fault
Cause: The working voltage of switch power is too low.



Remedy:

  • Check whether the switch power is normal.

  • Check whether the power board is normal.
oH
Motor overtemperature fault
Cause: Long-time overload running or exception occurred; The temperature detection resistance is abnormal; Motor overtemperature protection threshold is set improperly.



Remedy:

  • Check the motor, and perform maintenance on the motor.

  • Check whether the temperature sensor is proper.

  • Reset the motor overtemperature protection threshold.
tCE
Torque verification fault
Cause: The motor load is disconnected with the VFD.



Remedy:

  • Ensure the wiring between the motor and the VFD is in good conditions.

  • Decrease the torque verification point for light motor load.
P.oFF
VFD power-off status
Cause: Bus voltage is lower than the undervoltage point.



Remedy:

  • Check that the main power is disconnected.
m.oUt1
Unit phase-U Vce check fault
Cause: The corresponding IGBT inside the unit is damaged; Strong interference; External short circuit.



Remedy:

  • Ask for technical support.

  • Check for and remove the external interference source.

  • Check the external circuit and eliminate the load fault.
m.oUt2
Unit phase-V Vce check fault
Cause: The corresponding IGBT inside the unit is damaged; Strong interference; External short circuit.



Remedy:

  • Ask for technical support.

  • Check for and remove the external interference source.

  • Check the external circuit and eliminate the load fault.
m.oUt3
Unit phase-W Vce check fault
Cause: The corresponding IGBT inside the unit is damaged; Strong interference; External short circuit.



Remedy:

  • Ask for technical support.

  • Check for and remove the external interference source.

  • Check the external circuit and eliminate the load fault.
m.oC
Unit hardware overcurrent fault
Cause: The IGBT inside the unit is damaged; The inverter acceleration is too fast; Short circuit occurred to the output side of the unit.



Remedy:

  • Ask for technical support.

  • Update the parameter settings and restart.

  • Check the external circuit of the unit and eliminate the fault.
m.ItE
Unit current detection fault
Cause: The unit current detection parts is damaged; Interference exists.



Remedy:

  • Ask for technical support.

  • Check for and remove the external interference source.
m.IbC
Unit current imbalance fault
Cause: The three phase current amplitude difference of the power unit is too large and severely affect the system operating performance.



Remedy:

  • Check the input power.

  • Check the installation wiring.
m.oH1
Unit rectifier bridge overheating fault
Cause: Instantaneous overcurrent occurred to the rectifier; Three-phase output have interphase or the grounding is short circuited; Air duct is blocked or fan is damaged; Ambient temperature is too high; Control board cables or plugs are loose.



Remedy:

  • See solutions for overcurrent.

  • Re-wiring.

  • Dredge the vent duct or replace the fan.

  • Lower the ambient temperature.

  • Check and reconnect the control board.

  • Ask for technical support.
m.oH2
Unit IGBT overheating fault
Cause: Auxiliary power supply is damaged, and undervoltage occurred for drive voltage; The short through of bridge arm of power modules occurred; Control board is abnormal.



Remedy:

  • Check and reconnect the control board.

  • Ask for technical support.
m.EF1
Unit fan overheating fault
Cause: Fan is not powered on; Fan is overheated.



Remedy:

  • Check the power supply.

  • Clean the air duct of the inverter.
m.EF2
Unit filter module overheating fault
Cause: The unit is continuously running in overload; The air duct is blocked by foreign objects.



Remedy:

  • Check the inverter load and reduce the load power.

  • Clean the air duct of the inverter.
m.EF3
Unit input phase loss
Cause: SI external faulty input terminal action.



Remedy:

  • Check external device input.
m.ov
Unit bus overvoltage fault
Cause: The grid voltage is too high.



Remedy:

  • Check the input power.
m.Lv
Unit bus undervoltage fault
Cause: The grid voltage is too low.



Remedy:

  • Check the input power.
m.dn_C
Unit downstream communication fault
Cause: The address settings between the master and the slave is not consistent; The communication mode is set improperly for the slave; The communication cable is not connected properly.



Remedy:

  • Check the related settings.

  • Check the communication mode selection.

  • Check the wiring and adjust the wiring.
m.UP_C
Unit upstream communication fault
Cause: The address settings between the master and the slave is not consistent; The communication mode is set improperly for the master; The communication cable is not connected properly.



Remedy:

  • Check the related settings.

  • Check the communication mode selection.

  • Check the wiring and adjust the wiring.
m.PEr
Unit power supply detection fault
Cause: The working voltage of switch power is too low.



Remedy:

  • Ask for technical support.
m.CoFF
Unit optical-fiber communication fault
Cause: The optical fiber is not connected properly or the optical fiber is damaged.



Remedy:

  • Check the optical fiber or replace a new optical fiber.
PoFF
Power on failure
Cause: The optical fiber is normal but the bus voltage is too low.



Remedy:

  • Check the grid conditions.
(No Code)
Communication failure between keypad and main control board
Cause: The keypad is not connected properly.



Remedy:

  • Check the installation environment of the keypad.