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Fault diagnosis and countermeasures
Fault name
Accelerated over-current
Display panel
Err03
1. Earthing or short circuit of output loop of frequency convertor
2. Control way is vector and there is no parameter identification
3. Too short acceleration time
Check fault
4. Low voltage
cause
5. Impact load during acceleration process
6. No brake unit or brake resistance is installed
1. Eliminate peripheral fault
2. Conduct parameter identification of motor
3. Increase acceleration time
Fault handling
4. Adjust voltage to normal range
method
5. Cancel impact load
6. Install brake unit and brake resistance
Fault name
Constant-speed over-current
Display panel
Err04
1. Earthing or short circuit of output loop of frequency convertor
2. Control way is vector and there is no parameter identification
3. Low voltage
Check fault
4. Impact load during acceleration process
cause
5. Model selection of frequency convertor is small
1. Eliminate peripheral fault
2. Conduct parameter identification of motor
3. Adjust voltage to normal range
Fault handling
4. Cancel impact load
method
5. Select the frequency convertor with larger power grade
Fault name
Accelerated overvoltage
Display panel
Err05
1. Low input voltage
2. External force drives motor to operate during acceleration process
Check fault
3. Too short acceleration time
cause
4. No brake unit or brake resistance is installed
1. Adjust voltage to normal range
2. Cancel external force or install brake resistance
3. Increase acceleration time
Fault handling
method
4. Install brake unit and brake resistance
Fault name
Decelerated overvoltage
Display panel
Err06
1. High input voltage
2. External force drives motor to operate during deceleration process
Check fault
3. Too short deceleration time
cause
4. No brake unit or brake resistance is installed
1. Adjust voltage to normal range
2. Cancel external force or install brake resistance
Fault handling
3. Increase deceleration time
method
4. Install brake unit and brake resistance
Specification of high-performance vector convertor
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