INVT GD800 Series Drive

INVT GD800 Series Drive Fault Codes:

Fault Code and Meaning	Cause and Remedy
ov1 ACC overvoltage	Cause: Abnormal input voltage; Great energy feedback. Remedy: Check input power. Check whether the DEC time at load is too short. Check if the motor starts during rotation. Check if power consumption braking components are needed.
ov2 DEC overvoltage	Cause: Abnormal input voltage; Great energy feedback. Remedy: Check input power. Check whether the DEC time at load is too short. Check if the motor starts during rotation. Check if power consumption braking components are needed.
ov3 Constant speed overvoltage	Cause: Abnormal input voltage; Great energy feedback. Remedy: Check input power. Check whether the DEC time at load is too short. Check if the motor starts during rotation. Check if power consumption braking components are needed.
oC1 ACC overcurrent	Cause: Too fast ACC/DEC; Too low grid voltage; Too low inverter power; Abrupt load change or abnormal load; Grounding short circuit. Remedy: Enlarge ACC/DEC time. Check input power. Select the inverter with larger power. Check short circuit (grounding short circuit or short circuit between lines) or rotation block. Check the output configuration. Check strong interference.
oC2 DEC overcurrent	Cause: Too fast ACC/DEC; Too low grid voltage; Too low inverter power; Abrupt load change or abnormal load; Grounding short circuit. Remedy: Enlarge ACC/DEC time. Check input power. Select the inverter with larger power. Check short circuit (grounding short circuit or short circuit between lines) or rotation block. Check the output configuration. Check strong interference.
oC3 Constant speed overcurrent	Cause: Too fast ACC/DEC; Too low grid voltage; Too low inverter power; Abrupt load change or abnormal load; Grounding short circuit. Remedy: Enlarge ACC/DEC time. Check input power. Select the inverter with larger power. Check short circuit (grounding short circuit or short circuit between lines) or rotation block. Check the output configuration. Check strong interference.
Lv Bus undervoltage	Cause: Too low grid voltage. Remedy: Check input power.
oL1 Motor overload	Cause: Too low grid voltage; Incorrect motor rated current setting; Motor stall or abrupt load change. Remedy: Check input power. Reset motor rated current. Check the load and adjust the torque lifting capacity.
oL2 Inverter overload	Cause: Too fast ACC; Restart the rotating motor; Too low grid voltage; Too heavy load. Remedy: Enlarge ACC time. Avoid restart at stop. Check grid voltage. Select the inverter with larger power. Select a proper motor.
SPI Input side phase loss	Cause: Phase loss or great fluctuation at R,S,T. Remedy: Check input power. Check the wiring.
SPO Output side phase loss	Cause: Phase loss at U,V,W (or three phase asymmetry). Remedy: Check the output wiring. Check the motor and cable.
EF External fault	Cause: SI external fault input terminal action. Remedy: Check the external input device.
E_485 485 communication fault	Cause: Incorrect baud rate setting; Communication wiring fault; Wrong communication address; Strong interference. Remedy: Set proper baud rate. Check the wiring at communication port. Set correct communication address. Change or replace the wiring to improve anti-interference capability.
ItE Current detection fault	Cause: Bad connection of the control board; Hoare components damage; Abnormal amplifying circuit. Remedy: Check the connector and plug in again. Change the Hoare. Change the main control board.
tE Motor autotuning fault	Cause: The motor capacity does not match inverter capability; Incorrect motor parameters setting; Large deviation between parameters after autotuning and standard parameters; Autotuning timeout. Remedy: Change the inverter model. Set the motor type and the parameters of the nameplate correctly. Make the motor non-load and re-indentify. Check the motor connection and parameter setting. Check if the upper-limit frequency is above 2/3 of the rated frequency.
EEP EEPROM operation fault	Cause: Write and read error of control parameters; EEPROM damage. Remedy: Press STOP/RST to reset. Change the main control board.
PIdE PID feedback offline fault	Cause: PID feedback offline; PID feedback source disappears. Remedy: Check the PID feedback signal. Check the PID feedback source.
bCE Braking unit fault	Cause: Braking circuit fault or braking pipes damage; Too low braking resistance for external connection. Remedy: Check the braking unit and change new braking pipes. Increase the braking resistance.
ENd Running time arrival	Cause: The actual running time of the inverter is larger than the internal set time. Remedy: Contact with the manufacturer to adjust the set running time.
oL3 Electronic overload	Cause: The inverter will report overload pre-alarm according to the set value. Remedy: Check the load and the overload pre-alarm point.
PCE Keypad communication error	Cause: Bad connection of keypad wires or offline; Too long keypad wires and strong interference; Circuit fault of keypad or main board communication. Remedy: Check the keypad wires and ensure there is no fault. Check the ambient to eliminate interference source. Change the hardware and ask for maintenance service.
UPE Parameter uploading fault	Cause: Bad connection of the keypad wires or offline; Too long keypad wires and strong interference; Circuit fault of keypad or main board communication. Remedy: Check the ambient to eliminate interference source. Change the hardware and ask for maintenance service.
dNE Parameter downloading fault	Cause: Bad connection of the keypad wires or offline; Too long keypad wires and strong interference; Keypad data storage error. Remedy: Check the ambient to eliminate interference source. Change the hardware and ask for maintenance service. Back up the data in the keypad.
E_dP PROFIBUS communication fault	Cause: Incorrect communication address; Corresponding resistor is not dialed well; The files of master station GSD are not set well; Strong ambient interference. Remedy: Check related settings. Check the ambient to eliminate interference.
E_NEt Ethernet communication fault	Cause: Incorrect Ethernet address setting; Incorrect Ethernet communication mode; Strong ambient interference. Remedy: Check related settings. Check the communication mode selection. Check the ambient to eliminate interference.
E_CAN CANopen communication fault	Cause: Bad wires connection; Corresponding resistor is not dialed well; Unequal communication baud rate; Strong ambient interference. Remedy: Check the connection. Plug out the corresponding resistor. Set the same baud rate. Check the ambient to eliminate interference.
Eth1 Grounding short circuit	Cause: The inverter output is grounding short circuit; There is fault in the current detection circuit. Remedy: Check whether the connection of the motor is normal or not. Change the Hoare. Change the main control board.
dEU Speed deviation fault	Cause: Too large load or rotation block. Remedy: Check the load to ensure it is normal and increase detection time. Check whether the control parameter is proper.
STE Maladjustment	Cause: Inproper control parameter setting of the synchronous motor; Incorrect autotuning parameters; The inverter is not connected to the motor. Remedy: Check the load to ensure it is normal. Check whether the control parameter is proper. Increase maladjustment detection time.
LL Underload fault	Cause: The inverter reports underload pre-alarm according to the set value. Remedy: Detect the load and underload pre-alarm point.
ENC1o Encoder offline fault	Cause: Close loop vector control, encoder signal offline; Encoder damage. Remedy: Check the connection of the encoder and re-connect the wires. Check whether there is output from the encoder or not.
ENC1d Encoder reverse fault	Cause: Close loop vector control; The encoder is not connected or damaged; Inverter wiring error. Remedy: Check and adjust the connection.
E_STO STO fault	Cause: STO terminals off. Remedy: Check the external controller.
FAE Brake action fault	Cause: Brake feedback action fault. Remedy: Check the external contactor.
E_ASC Master-slave communication fault	Cause: Incorrect address setting; Incorrect communication mode selection; Bad connection of communication wires. Remedy: Check related settings. Check the communication mode selection. Check and adjust the connection.
E_SLE Slave fault	Cause: Slave fault. Remedy: Check related settings of the slave and environment.
dF_CE DSP and FPGA communication fault	Cause: DSP cannot communicate with FPGA. Remedy: Control board fault, ask for maintenance service.
CPoE Control power failure	Cause: Too low working voltage of switch mode power supply. Remedy: Check whether the switch mode power supply is normal. Check whether the power board is normal.
oH Motor overheat	Cause: Long-time overload running or abnormal running; Abnormal temperature detecting resistor; Inproper overheat protection point setting. Remedy: Check and maintain the motor. Check whether the temperature sensor is normal. Reset the overheat protection point.
tCE Torque verification fault	Cause: The load of the motor is out of the inverter. Remedy: Check whether the connection of the motor and inverter is good. Due to light load, it is necessary to reduce the torque verification point.
P.oFF Inverter power off	Cause: Bus voltage is lower than undervoltage point. Remedy: Check whether the main power is off.
m. oUt1 No. m U-phase Vce detection fault	Cause: Internal corresponding IGBT damage; Strong interference; External short circuit. Remedy: Ask for service. Check the ambient to eliminate interference source. Check the external circuit to eliminate load fault.
m. oUt2 No. m V-phase Vce detection fault	Cause: Internal corresponding IGBT damage; Strong interference; External short circuit. Remedy: Ask for service. Check the ambient to eliminate interference source. Check the external circuit to eliminate load fault.
m. oUt3 No. m W-phase Vce detection fault	Cause: Internal corresponding IGBT damage; Strong interference; External short circuit. Remedy: Ask for service. Check the ambient to eliminate interference source. Check the external circuit to eliminate load fault.
m.oC No. m hardware overcurrent	Cause: Internal IGBT is broken; Too fast ACC; Short circuit at output side. Remedy: Ask for service. Update parameter settings and run again. Check the external circuit to eliminate short circuit.
m.ItE No. m current detection fault	Cause: Current detection component damage; Interference. Remedy: Ask for service. Check the ambient to eliminate interference source.
m.IbC No. m current unbalance	Cause: The 3-phase current amplitude of power unit is quite different. Fault alarms When the difference seriously affects the system performance. Remedy: Check input power. Check the wiring.
m.oH1 No. m rectifier bridge overheat	Cause: Inverter instantaneous overcurrent; Interphase or grounding short circuit of output 3-phase; The air duct is blocked or the fan is damaged; Too high ambient temperature. Remedy: Refer to overcurrent measures. Reset the wiring. Clean the air duct or change the fan. Reduce the ambient temperature. Check and connect again. Ask for service.
m.oH2 No. m IGBT overheat	Cause: The wiring or plug-in of the control board is loose; Auxiliary power damage, drive undervoltage; bridge arm conducting of power module; Abnormal control board. Remedy: Ask for service.
m. EF1 No. m fan overheat	Cause: Continuous overload running; The air duct is blocked. Remedy: Check the inverter load and reduce load power. Clean the air duct and solve heat emission.
m. EF2 No. m filter unit overheat	Cause: Continuous overload running; The air duct is blocked. Remedy: Check the inverter load and reduce load power. Clean the air duct and solve heat emission.
m.EF3 No. m inverter unit input phase loss	Cause: SI external fault input terminal action. Remedy: Check the external device input.
m.ov No. m bus overvoltage	Cause: Too high grid voltage. Remedy: Check input power.
m.Lv No. m bus undervoltage	Cause: Too low grid voltage. Remedy: Check input power.
m.dn_C No. m down communication fault	Cause: The address setting of the master does not match with that of the slave; Incorrect slave communication mode; Bad connection of communication lines. Remedy: Check related settings. Check communication mode. Check and adjust the connection.
m.UP_C No. m up communication fault	Cause: The address setting of the master does not match with that of the slave; Incorrect slave communication mode; Bad connection of communication lines. Remedy: Check related settings. Check communication mode. Check and adjust the connection.
m.PEr No. m power failure	Cause: Too low working voltage of switch mode power supply. Remedy: Ask for service.
m.CoFF No. m optical fiber communication failure	Cause: The optical fiber is not connected well or damaged. Remedy: Check the environment or change the optical fiber.
PoFF Power on failure	Cause: Normal optical fiber communication but too low bus voltage. Remedy: Check the grid environment.
N/A Communication failure between keypad and main control board	Cause: The keypad is not connected properly. Remedy: Check installation environment of the keypad.