Karda KD3000 Series, Simple Manual

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10
VIII. Troubleshooting
Fault Alarm and Troubleshooting
When the inverter is abnormal, protection function acts: LED displays fault code and the content, fault relay acts,
the inverter stops output and the motor coasts to stop. Mini series inverter’s fault contents and troubleshooting
is shown in Table 7-1. After fault alarm occurs, fault phenomenon should be recorded in detail, the fault should
be processed according to Table 7-1. When in need of technical assistance, please contact your supplier.
Fault
code
Type of faults Possible fault reasons Troubleshooting
E-01 Acc over current
Acc time is too short Adjust acc time
V/F curve setup is not suitable Adjust V/F curve
Restart the motor in running Setup start mode as speed tracking restart
Torque boost setup is too big Adjust torque boost or set as auto mode
Inverter capacity is too low Select inverter with proper capacity
E-02 Dec over current
Dec time is too short Adjust Dec time
Potential load or load inertia is too big Add suitable braking device
Inverter capacity is too low Select inverter with proper capacity
E-03
Over current at
constant speed
running
Load mutation Check load
Acc or Dec time is too short Adjust Acc or Dec time
Input voltage abnormal Check input power supply
Load abnormal check load
Inverter capacity is too low Select inverter with proper capacity
E-04 Acc overvoltage
Input voltage abnormal Check input power supply
Acc time is too short Adjust Acc time
Restart the motor in running Setup start mode as speed tracking restart
E-05
Dec
overvoltage
Dec time is too short Adjust the Dec time
Potential load or load inertia is too big Add suitable braking device
E-06
Overvoltage at
constant speed
running
Input voltage abnormal Check input power supply
Acc or Dec time is too short Adjust the Acc or Dec time
Abnormal change of input voltage Mount input reactor
Load inertia is too big Add suitable braking device
E-07
Overvoltage of
control power
supply
Input voltage abnormal Check input power supply
E-08
Inverter overheat
Air duct obstruction Clean air duct
Environment temperature is too high
Improve the ventilation or decrease the
carrier frequency