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    020-28008901

    中文版 | English

    Service Support



    FAQ
    Position : Home > FAQ

    Fault code

    fault type

    Possible causes of failure

    Fault countermeasures

    oCI

    Over current when inverters speed up

     

    The load is too heavy and the acceleration time is too short.

    Extend acceleration time

    V/F curve is not suitable

    Adjust V/F curve settings.

    Restart the rotating motor

    Set to check speed restart function

    Torque set value is too large

    Adjust manual torque to automatic torque

    Inverter power is too small

    Use inverter with high power

    oCd

    Over current when inverters slow down

     

     

     

     

     

     

    Deceleration time is too short

    Extend deceleration time

    Potential load or large inertia load

    Increase the braking power of the external energy consumption brake

    Inverter power is small

    Use inverter with high power

    oCo

    Over current when the inverter is running at constant speed

    Sudden change in load

    Check or reduce the load mutation

    Acceleration and deceleration time setting is too short

    Appropriately extend acceleration and deceleration time

    Abnormal load

    Check load

    Low power grid voltage

    Check input power

    Inverter power is small

    Use inverter with high power

    oUI

    Over voltage when inverters speed up

    Abnormal

    Input voltage

    Check input power

    Acceleration time setting is too short

    Appropriately extend acceleration time

    Restart the rotating motor

    Set to check speed restart function

     

     

     

     

    Fault code

    fault type

    Possible causes of failure

    Fault countermeasures

    oUd

     

     

    Over voltage when inverters slow down

     

    Deceleration time setting is too short

    Appropriately extend Deceleration time

    Potential load or large inertia load

    Increase the braking power of the external energy consumption brake

    oUo

    Over voltage when the inverter is running at constant speed

    Abnormal

    Input voltage

    Check input power

    Acceleration and deceleration time setting is too short

    Appropriately extend acceleration and deceleration time

    Abnormal

    Input voltage

    Install input reactor

    Large load inertia

    Use energy consumption brake

    oUC

    Control power over voltage

    Abnormal

    Input voltage

    Check the input power or seek the service

    oH

     

    Inverter over heat

    Air duct obstruction

    Clean up the duct or improve the ventilation conditions.

     High environmental temperature 

    Improve ventilation conditions, reduce the carrier frequency

    Fan damage

    Replace fan

    Abnormal inverter module

    Seek the service

    oLI

    Inverter overload

    Acceleration time setting is too short

    Appropriately extend acceleration time

    DC brake capacity is too large

    Reduce the DC braking current and prolong the braking time.

    V/F curve is not suitable

    Adjust the V/F curve and the torque boost

    Restart the rotating motor

    Set to check speed restart function

    Low power grid voltage

    Check power grid voltage

    Load is too large

    Use inverter with high power

    oLd

     

     

     

    Motor

    Overload

     

     

     

     

    V/F curve is not suitable

    Adjust the V/F curve and the torque boost

    Power grid voltage is to small

    Check power grid voltage

    General Motors long term operation with low speed and large load

     Choose variable frequency motor for long term low speed operation

     

    The motor overload protection coefficient setting is not correct

     

    Correctly set the motor overload protection coefficient

    Motor blocking or load mutations are too large

    Check load

    LU

    Low voltage when running

    Power grid voltage is too low

    Check the power grid voltage

    fault code

    fault type

    Possible causes of failure

    Fault countermeasures

    IP

    Inverter module protection

    Over current

    See over current countermeasures

    Output three phase short circuit or grounding short circuit

    To rewire

    Air duct blockage or fan damage

    Clean the air duct or replace the fan

    high environmental temperature 

    reduce the environmental temperature 

    Control panel connection or plug loose

    Check and reconnect

    Abnormal current waveform caused by output phase lack

    Check wiring

    Auxiliary power supply damage, and drive voltage is low

    Seek the manufacturer or agent service

    Abnormal control panel

    Seek the manufacturer or agent service

    oE

    External device failure

    External fault emergency stop and terminal closure

    disconnect external fault terminal after handle external fault

    CCE

    Current detection and circuit fault

    Control panel connection or plug loose

    Check and reconnect

    Auxiliary power supply damage

    Seek the manufacturer or agent service

    Hall device damage

    Seek the manufacturer or agent service

    Abnormal amplifier circuit

    Seek the manufacturer or agent service

    CE

     

    RS232/485

    Communication failure

    The baud rate is set incorrectly

    Set the appropriate baud rate

    Serial port communication error

    Press    button to reset, and seek the service

    Fault alarm parameter setting is improper

    Modify d3.09 ~ d3.12 settings

    The upper machine does not work

    Check whether the upper machine is working or not, and whether the connection is correct or not

    CFI

    System interference

    Serious interference

    Push button reset or add the power supply filter on the external side of power input

    Master control board DSP read and write error

    Push button reset and seek service

    EPE

    Error in reading and writing

    Error in reading and writing control parameters

    Push button reset and seek service


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