INVT GD600 Series Drive

INVT GD600 Series Drive Fault Codes:

Fault Code and MeaningCause and Remedy
LV1
Input grid undervoltage
Cause: The grid voltage is 20% lower than the general value, or the internal hardware circuit of the rectifier unit is abnormal.



Remedy:

  • Check the grid input power.
OV1
Grid voltage
Cause: The grid voltage is 20% higher than the general value, or the internal hardware circuit of the rectifier unit is abnormal.



Remedy:

  • Check the grid input power.

  • Check the related function code settings.
SPI1
A phase loss on the input side
Cause: A phase on the input side is lost.



Remedy:

  • Check the wiring of A phase and grid voltage.
SPI2
B phase loss on the input side
Cause: B phase on the input side is lost.



Remedy:

  • Check the wiring of B phase and grid voltage.
SPI3
C phase loss on the input side
Cause: C phase on the input side is lost.



Remedy:

  • Check the wiring of C phase and grid voltage.
PLLF
Phase-locked failed
Cause: The grid voltage is abnormal.



Remedy:

  • Check the input wiring and grid voltage.
OH1
Bridge rectifier module overheating
Cause: Air duct is blocked or fan is damaged; Ambient temperature is too high; Long-time overload running.



Remedy:

  • Ventilate the air duct or replace the fan.

  • Lower the ambient temperature.
OH2
Heat sink module overheating
Cause: Ambient temperature is too high; Long-time overload running.



Remedy:

  • Ventilate the air duct or replace the fan.

  • Lower the ambient temperature.
EF
External fault
Cause: SI external fault input terminal acts.



Remedy:

  • Check external device input.
E-485
485 communication fault
Cause: Baud rate is set improperly; Communication line fault; Communication address error; Communication suffers from strong interference.



Remedy:

  • Set proper baud rate.

  • Check the wiring of communication interfaces.

  • Set the proper communication address.

  • Replace or change the wiring to enhance the anti-interference capacity.
LV
Bus undervoltage
Cause: Bus undervoltage occurs during operation; Detect the actual bus voltage.



Remedy:

  • Check the bus voltage.

  • Change the undervoltage threshold parameter.

  • Replace the main control board.
OV
Bus overvoltage
Cause: Bus overvoltage occurs during operation; Detect the actual bus voltage.



Remedy:

  • Check the bus voltage.

  • Change the overvoltage threshold parameter.

  • Replace the main control board.
EEP
EEPROM operation fault
Cause: R/W error occurred to the control parameters; EEPROM is damaged.



Remedy:

  • Press STOP/RST to reset.

  • Replace the main control board.
OL
Rectifier unit overload fault
Cause: The rectifier unit releases overload pre-alarm based on the set value.



Remedy:

  • Check the load and overload pre-alarm threshold.
bCE
Braking unit direct connection fault
Cause: Fault occurred to the brake circuit or the braking pipe is damaged.



Remedy:

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

  • Increase the brake resistance.
bOL
Braking pipe overload
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.
bOC
Brake overcurrent
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.
E-DP
PROFIBUS communication fault
Cause: The communication address is incorrect; The matching resistor is not switched on improperly; The GSD file of the master station is set improperly; 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; Ethernet communication mode is selected 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.
OFFL
Certain slave units offline
Cause: The number of actual slave nodes (P17.15) conflicts with the number of set slave nodes (P21.33); Line contact is poor; Matching resistor not on; Baud rates do not match; Address conflict.



Remedy:

  • Check the values of P17.15 and P21.33.

  • Switch on the matching resistor.

  • Set the same baud rate.

  • Check all master/slave addresses.

  • Check CANopen network parameters.
PCE
PLC card communication fault
Cause: Communication address incorrect; Matching resistor not switched on; GSD file set improperly; Peripheral interference too large.



Remedy:

  • Check the related settings.

  • Check the surrounding environment, and eliminate interference effects.
E-C1
Communication fault occurred to the expansion card slot 1
Cause: The communication state of communication card in the expansion card slot 1 is abnormal; The peripheral interference is too large.



Remedy:

  • Check whether the expansion card in card slot 1 is contacted well.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
E-C2
Communication fault occurred to the expansion card slot 2
Cause: The communication state of communication card in the expansion card slot 2 is abnormal; The peripheral interference is too large.



Remedy:

  • Check whether the expansion card in card slot 2 is contacted well.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
E-F1
Identification fault occurred to the expansion card slot 1
Cause: The communication card in the expansion card slot 1 failed to be identified normally; The peripheral interference is too large.



Remedy:

  • Check whether the expansion card in card slot 1 is contacted well.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
E-F2
Identification fault occurred to the expansion card slot 2
Cause: The communication card in the expansion card slot 2 failed to be identified normally; The peripheral interference is too large.



Remedy:

  • Check whether the expansion card in card slot 2 is contacted well.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
E-CP
Expansion card detection abnormation
Cause: The type of the expansion card is wrong; The peripheral interference is too large.



Remedy:

  • Check whether the expansion card is good.

  • Check the communication mode selection.

  • Check the surrounding environment, and eliminate interference effects.
END
Running time reached
Cause: The actual running time is longer than the set time.



Remedy:

  • Ask the supplier to adjust the preset running time.
OUt1
Inverter unit U-phase protection
Cause: ACC is too fast; IGBT module is damaged; Misacts caused by interference; Drive wires are poorly connected; To-ground short circuit occurs.



Remedy:

  • Increase ACC time.

  • Replace the power unit.

  • Check drive wires.

  • Check whether there is strong interference surrounding the peripheral device.
OUt2
Inverter unit V-phase protection
Cause: ACC is too fast; IGBT module is damaged; Misacts caused by interference; Drive wires are poorly connected; To-ground short circuit occurs.



Remedy:

  • Increase ACC time.

  • Replace the power unit.

  • Check drive wires.

  • Check whether there is strong interference surrounding the peripheral device.
OUt3
Inverter unit W-phase protection
Cause: ACC is too fast; IGBT module is damaged; Misacts caused by interference; Drive wires are poorly connected; To-ground short circuit occurs.



Remedy:

  • Increase ACC time.

  • Replace the power unit.

  • Check drive wires.

  • Check whether there is strong interference surrounding the peripheral device.
OV1
Over-voltage during ACC
Cause: Exception occurred to input voltage; Large energy feedback; Lack of braking units; Dynamic brake is not enabled.



Remedy:

  • Check the input power.

  • Check whether load DEC time is too short.

  • Install dynamic brake components.

  • Check the setup of related function codes.
OV2
Over-voltage during DEC
Cause: Exception occurred to input voltage; Large energy feedback; Lack of braking units; Dynamic brake is not enabled.



Remedy:

  • Check the input power.

  • Check whether load DEC time is too short.

  • Install dynamic brake components.

  • Check the setup of related function codes.
OV3
Over-voltage during constant speed running
Cause: Exception occurred to input voltage; Large energy feedback; Lack of braking units; Dynamic brake is not enabled.



Remedy:

  • Check the input power.

  • Install dynamic brake components.

  • Check the setup of related function codes.
OC1
Over-current during ACC
Cause: ACC is too fast; Grid voltage is too low; Inverter power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference; Overvoltage stall protection not enabled.



Remedy:

  • Increase ACC /DEC time.

  • Check the input power.

  • Select the inverter with larger power.

  • Check if the load is short circuited or rotation is not smooth.

  • Check the output wiring.

  • Check if there is strong interference.

  • Check the setup of related function codes.
OC2
Over-current during DEC
Cause: Grid voltage is too low; Inverter power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference.



Remedy:

  • Increase ACC /DEC time.

  • Check the input power.

  • Select the inverter with larger power.

  • Check if the load is short circuited.

  • Check the output wiring.

  • Check if there is strong interference.
OC3
Over-current during constant speed running
Cause: Grid voltage is too low; Inverter power is too small; Load transient or exception occurred; To-ground short circuit or output phase loss occurred; Strong external interference.



Remedy:

  • Check the input power.

  • Select the inverter with larger power.

  • Check if the load is short circuited.

  • Check the output wiring.

  • Check if there is strong interference.
UV
Bus undervoltage fault
Cause: Grid voltage is too low; Overvoltage stall protection is not enabled.



Remedy:

  • Check the grid input power.

  • Check the setup of related function codes.
OL1
Motor overload
Cause: Grid voltage is too low; Rated current of the motor is set improperly; Motor stall or load jumps violently.



Remedy:

  • Check the grid voltage.

  • Reset the rated current of the motor.

  • Check the load and adjust torque boost.
OL2
Inverter overload
Cause: ACC is too fast; The motor in rotating is restarted; Grid voltage is too low; Load is too large; Power is too small.



Remedy:

  • Increase ACC time.

  • Avoid restart after stop.

  • Check grid voltage.

  • Select the inverter with larger power.

  • Select proper motor.
SECAN
Master/slave synchronous CAN fault
Cause: In master station mode, the communication network has two or more slaves of the same station; Slave count inconsistency.



Remedy:

  • Check whether the slave stations in the communication network are set repeatedly.

  • Check whether the wiring of each slave station and master station is normal.
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.
OH2
Overheat of inverter module
Cause: Air duct is blocked or fan is damaged; Ambient temperature is too high; Long-time overload running.



Remedy:

  • Ventilate the air duct or replace the fan.

  • Lower the ambient temperature.
CE
RS485 communication fault
Cause: Incorrect baud rate; Communication line fault; Incorrect communication address.



Remedy:

  • Set a proper baud rate.

  • Check the communication interface cable.

  • 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: Motor capacity does not match inverter capacity; Difference exceeds five power classes.



Remedy:

  • Change the inverter model, or adopt V/F mode for control.

  • Set proper motor type and nameplate parameters.

  • Empty the motor load and carry out autotuning again.
EEP
EEPROM fault
Cause: R/W error occurred to the control parameters; EEPROM is damaged.



Remedy:

  • Press STOP/RST to reset.

  • Replace 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.
S-Err
Master/slave synchronous CAN slave fault
Cause: In the master station mode, the master station detects that a fault occurred to the slave.



Remedy:

  • Check the fault occurred to CAN slave station in the communication network.
OL3
Electronic overload fault
Cause: The inverter releases overload pre-alarm based on the set value.



Remedy:

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



Remedy:

  • Check the keypad cable.

  • Check for and remove the external interference source.

  • Replace the hardware and seek maintenance services.
UPE
Parameter upload error
Cause: Keypad cable connected improperly/disconnected; Cable too long causing interference; Keypad or mainboard 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/disconnected; Cable too long causing interference; Keypad data storage error.



Remedy:

  • Check for and remove the external interference source.

  • Replace the hardware and seek maintenance services.

  • Re-back up the data on the keypad.
ETH1
To-ground short circuit fault 1
Cause: Inverter output is short connected to the ground; Current detection circuit is faulty; Actual motor power setup deviates sharply.



Remedy:

  • Check whether the motor wiring is proper.

  • Replace the hall component.

  • Replace the main control board.

  • Reset the motor parameters properly.
ETH2
To-ground short circuit fault 2
Cause: Inverter output is short connected to the ground; Current detection circuit is faulty; Actual motor power setup deviates sharply.



Remedy:

  • Check whether the motor wiring is proper.

  • Replace the hall component.

  • Replace the main control board.

  • Reset the motor parameters properly.
dEu
Speed deviation fault
Cause: Load is too heavy, or stall occurred.



Remedy:

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

  • Check whether the control parameters are set properly.
STo
Maladjustment fault
Cause: Control parameters of the synchronous motor set improperly; Parameter gained from autotuning is inaccurate; Inverter not connected to motor.



Remedy:

  • Check the load to ensure it is proper.

  • Check whether the control parameters are set correctly.

  • Increase the maladjustment detection time.
LL
Electronic underload fault
Cause: The inverter performs the underload pre-alarm based on the set value.



Remedy:

  • Check the load and overload pre-alarm threshold.
ENC1O
Encoder offline fault
Cause: Encoder line sequence is wrong, or signal wires are poorly connected.



Remedy:

  • Check the encoder wiring.
ENC1D
Encoder reversal fault
Cause: The encoder speed signal is contrary to the motor running direction.



Remedy:

  • Reset encoder direction.
ENC1Z
Encoder Z pulse offline fault
Cause: Z signal wires are disconnected.



Remedy:

  • Check the wiring of Z signal.
OT
Motor over-temperature fault
Cause: Motor over-temperature input terminal is valid; Temperature detection resistance is abnormal; Long-time overload.



Remedy:

  • Check the wiring of the motor over-temperature input terminal (function 57).

  • Check whether the temperature sensor is proper.

  • Check the motor, and perform maintenance on the motor.
E-OT2
Overtemperature fault (24V PG card)
Cause: The temperature detected by EC-PG707-24 exceeds the threshold.



Remedy:

  • Check for external overtemperature.

  • Check and maintain related devices.
E-OT3
Overtemperature fault (IO card)
Cause: The temperature detected by EC-IO702 exceeds the threshold.



Remedy:

  • Check for external overtemperature.

  • Check and maintain related devices.
E-OT4
Overtemperature fault (AI/AO detection)
Cause: The temperature detected by AI/AO exceeds the threshold.



Remedy:

  • Check for external overtemperature.

  • Check and maintain related devices.
STO
Safe torque off
Cause: Safe torque off function is enabled by external forces.



Remedy:

  • (No specific remedy listed, check external safety switches).
STL1
Exception occurred to safe circuit of channel H1
Cause: The wiring of STO is improper; Fault occurred to external switch of STO; Hardware fault.



Remedy:

  • Check whether terminal wiring of STO is proper and firm.

  • Check whether the external switch of STO can work properly.

  • Replace the control board.
STL2
Exception occurred to safe circuit of channel H2
Cause: The wiring of STO is improper; Fault occurred to external switch of STO; Hardware fault.



Remedy:

  • Check whether terminal wiring of STO is proper and firm.

  • Check whether the external switch of STO can work properly.

  • Replace the control board.
STL3
Exception occurred to channel H1 and channel H2
Cause: Hardware fault occurred to STO circuit.



Remedy:

  • Replace the control board.
CrCE
Safety code FLASH CRC check fault
Cause: Control board is faulty.



Remedy:

  • Replace the control board.
P-E1
PLC card customized fault 1
Cause: Faults defined by the PLC expansion card.



Remedy:

  • View the PLC expansion card application program.
P-E2 to P-E10
PLC card customized faults
Cause: PLC card customized faults (2 through 10).



Remedy:

  • Figure out the cause of the fault (defined by PLC program).
E-Err
Repetitive expansion card type
Cause: The two inserted expansion cards are of the same type.



Remedy:

  • You should not insert two cards with the same type.

  • Check the type of expansion card, and remove one card after power-off.
ENCUV
Encoder UVW loss fault
Cause: No electric level variation occurred to UVW signal.



Remedy:

  • Check the wiring of UVW.

  • Encoder is damaged.
F1-Er
Failed to identify the expansion card in card slot 1
Cause: There is data transmission in interfaces of card slot 1, however, it cannot read the card type.



Remedy:

  • Confirm whether the expansion card inserted can be supported.

  • Stabilize the expansion card interfaces after power-off.

  • Check whether the insertion port is damaged.
F2-Er
Failed to identify the expansion card in card slot 2
Cause: There is data transmission in interfaces of card slot 2, however, it cannot read the card type.



Remedy:

  • Confirm whether the expansion card inserted can be supported.

  • Stabilize the expansion card interfaces after power-off.

  • Check whether the insertion port is damaged.
C1-Er
Communication timeout occurred to the expansion card in card slot 1
Cause: There is no data transmission in interfaces of card slot 1.



Remedy:

  • Confirm whether the expansion card inserted can be supported.

  • Stabilize the expansion card interfaces after power-off.

  • Check whether the insertion port is damaged.
C2-Er
Communication timeout occurred to the expansion card in card slot 2
Cause: There is no data transmission in interfaces of card slot 2.



Remedy:

  • Confirm whether the expansion card inserted can be supported.

  • Stabilize the expansion card interfaces after power-off.

  • Check whether the insertion port is damaged.
PoFF
System power failure
Cause: The system is powered off or the bus voltage is too low.



Remedy:

  • Check the grid conditions.