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Specification of high-performance vector convertor
Chapter 8 Fault diagnosis and countermeasures
8.1 Fault warning and countermeasures
Frequency convertor owns 24 warning information and protection functions. Once the fault
occurs, protection function starts action and the frequency convertor stops output. Fault relay of
frequency convertor starts contact action and fault code displays on display panel of frequency
convertor. Before users seek for service, they can examine by themselves as per instructions in this
chapter to analyze fault cause and find out solutions. If the causes are those in dotted line box, please
seek for service and contact with agent of frequency convertor or our company directly.
Fault name
Invert unit protection
Display panel
Err01
1. Short circuit of output loop of frequency convertor
2. Too long wiring between motor and frequency convertor
3. Overheating module
Check fault
4. Internal wiring of frequency convertor becomes loose
cause
5. Abnormal main control panel
6. Abnormal driver board
7. Abnormal inversion module
1. Eliminate peripheral fault
2. Install electric reactor or output filter
3. Check if blocking of air channel and normal work of fan, eliminate existing problems
Fault handling
4. Insert all connecting lines
method
5. Seek for technical support
6. Seek for technical support
7. Seek for technical support
Fault name
Accelerated over-current
Display panel
Err02
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. Manual torque promotion or V/F curve is not suitable
cause
5. Low voltage
6. Start rotating motor
7. Impact load during acceleration process
8. Model selection of frequency convertor is small
1. Eliminate peripheral fault
2. Conduct parameter identification of motor
3. Increase acceleration time
Fault handling
4. Adjust manual torque promotion or V/F curve
method
5. Adjust voltage to normal range
6. Start tracking rotation speed or restart after motor stops
7. Cancel impact load
8. Select the frequency convertor with larger power grade
Fault diagnosis and countermeasures
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