OUt1

Inverter unit U phase protection

lThe   acceleration is too fast

lThere is   damage to the internal to IGBT of the phase

lMisoperation   is caused by interference.

lThe   connection of the driving wires is not good

lShort-to-ground   occurs.

l Increase acceleration   time

l Change   the power unit

l Check the   driving wires

l Check if   there is strong interference to the external equipment

OUt2

Inverter unit V phase protection

OUt3

Inverter unit W phase protection

OV1

ACC overvoltage

lThe input   voltage is abnormal

lThere is   large energy feedback

lNo brake   components

lBrake   energy is not open

lCheck the   input power

lCheck if   the DEC time of the load is too short, or the motor is started when it is   rotating.

lInstall a   dynamic brake components

lCheck the   setting of relative function codes

OV2

DEC overvoltage

OV3

Constant-speed overvoltage

OC1

ACC overcurrent

lThe   acceleration or deceleration is too fast

lThe   voltage of the grid is too low

lThe power   of 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 relative function codes

OC2

DEC overcurrent

OC3

Constant-speed overcurrent

UV

Bus undervoltage

lThe   voltage of the grid is too low

lThe   overvoltage stall protection is not open

lCheck the   input power of the grid;

lCheck the   setting of relative function codes

OL1

Motor overload

lThe   voltage of the grid is too low

lThe rated   current of the motor is not correctly set

lThe motor   stall or load transients is too strong

lCheck the   power of the grid

lReset the   rated current of the motor

lCheck the   load and adjust the torque lift

OL2

VFD overload

lThe   acceleration is too fast

lRestart   the rotating motor

lThe   voltage of the grid is too low.

lThe load   is too heavy.

lThe motor   power is too small.

lIncrease   the ACC time

lAvoid the   restarting after stopping.

lCheck the   power of the grid

lSelect a VFD   with bigger power.

lSelect a   proper motor.

SPI

Input side phase loss

lPhase   loss or fluctuation of input R,S,T

lCheck   input power

lCheck   installation distribution

SPO

Output side 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.

lDredge   the vent duct or replace the fan

lLower the   ambient temperature

OH2

Inverter module overheated

EF

External fault

lSI external   fault input terminals act

lCheck the   external device input

CE

485 communication fault

lThe baud   rate setting is incorrect.

lFault   occurs to the communication wiring.

lCommunication   address is wrong.

lThere is   strong interference to the communication.

lSet   proper baud rate

lCheck the   communication connection distribution

lSet   proper communication address.

lChange or   replace the connection distribution or improve the anti-interference   capability.

ItE

Current-detecting fault

lThe   connection of the control board is not good

lHall components   are 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 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

Brake unit fault

lBrake   circuit fault or damage to the brake pipes

lExternal brake   resistor is insufficient

lCheck the   brake unit, and change new brake pipe

lIncrease   the brake resistor

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.

OL3

Electrical overload

lVFD   will report overload pre-alarm based on the set value.

lCheck the   load and the overload pre-alarm threshold.

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.

lThere is   circuit fault on the communication of the keypad and main board.

lCheck the   keypad wires and ensure whether there is mistake.

lChange   hardware and ask for service.

lChange 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.

E-DP

PROFIBUS communication fault

lCommunication   address is wrong

lCorresponding   resistor is not dialed

lThe files   of main stop GSD does not set sound

lThe   peripheral interference is too large.

lCheck   related setting

lCheck the   surrounding environment, and eliminate interference effects.

E-NET

Ethernet communication fault

lEthernet   address is set improperly.

lEthernet   communication is wrong

lThe   peripheral interference is too large.

lCheck the   relative setting.

lCheck the   communication method selection.

lCheck the   surrounding environment, and eliminate interference effects.

E-CAN

CANopen communication fault

lThe   connection is not sound

lCorresponding   resistor is not dialed

lThe   communication baud rate is not matched

lThe   peripheral interference is too large.

lCheck the   connection

lDraw out   the matching resistor

lSet the   same baud rate

lCheck the   surrounding environment, and eliminate interference effects.

ETH1

Grounding shortcut fault 1

lThe   output of the VFD is short circuited with the ground.

lThere is   fault in the current detection circuit.

lThe   actual motor power sharply differs from the VFD power.

lCheck if   the connection of the motor is normal or not

lChange   the hall

lChange   the main control panel

lSet motor   parameters correctly.

ETH2

Grounding shortcut fault 2

lThe   output of the VFD is short circuited with the ground.

lThere is   fault in the current detection circuit.

lThe   actual motor power sharply differs from the VFD power.

lCheck if   the connection of the motor is normal or not

lChange   the Hall
  Change the main control panel

lSet motor   parameters correctly.

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.

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 threshold.

ENC1O

Encoder offline fault

lEncoder   line sequence error, or signal wire is connected improperly

lCheck   encoder wiring

ENC1D

Encoder reverse fault

lEncoder   speed signal is contrary to running direction of the motor

lReset   encoder direction

ENC1Z

Encoder pulse Z offline

lZ signal   wire is disconnected

lCheck Z   signal wiring

OT

Motor over-temperature fault

lMotor   overtemperature input terminal is valid

lTemperature   detection resistor is abnormal

lMotor   runs in overload condition in long time or it is abnormal

lCheck the   wiring of motor overtemperature input terminal (terminal function 57)

lCheck whether   temperature sensor functions normally

lCheck and   maintain the motor.

PoFF

System power off

System   power off or bus voltage is too low

Check   grid environment

Communication between keypad and main   control plate failed

Keypad is   connected improperly

Check the   installation of keypad