
Fault diagnosis and countermeasures
Specification of SN200G high-performance vector convertor
- 154 -
Fault name
Accelerated over-current
Display panel
Err03
Check fault
cause
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
4. Low voltage
5. Impact load during acceleration process
6. No brake unit or brake resistance is installed
Fault handling
method
1. Eliminate peripheral fault
2. Conduct parameter identification of motor
3. Increase acceleration time
4. Adjust voltage to normal range
5. Cancel impact load
6. Install brake unit and brake resistance
Fault name
Constant-speed over-current
Display panel
Err04
Check fault
cause
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
4. Impact load during acceleration process
5. Model selection of frequency convertor is small
Fault handling
method
1. Eliminate peripheral fault
2. Conduct parameter identification of motor
3. Adjust voltage to normal range
4. Cancel impact load
5. Select the frequency convertor with larger power grade
Fault name
Accelerated overvoltage
Display panel
Err05
Check fault
cause
1. Low input voltage
2. External force drives motor to operate during acceleration process
3. Too short acceleration time
4. No brake unit or brake resistance is installed
Fault handling
method
1. Adjust voltage to normal range
2. Cancel external force or install brake resistance
3. Increase acceleration time
4. Install brake unit and brake resistance
Fault name
Decelerated overvoltage
Display panel
Err06
Check fault
cause
1. High input voltage
2. External force drives motor to operate during deceleration process
3. Too short deceleration time
4. No brake unit or brake resistance is installed
Fault handling
method
1. Adjust voltage to normal range
2. Cancel external force or install brake resistance
3. Increase deceleration time
4. Install brake unit and brake resistance