| Error Code | Cause | Solution |
|---|---|---|
| LU
Under-Voltage Protection |
• Input voltage is too low | • Check supply voltage
• Verify parameter settings |
| OC
Over-current |
• Acceleration time too short
• Load too heavy • Output short circuit |
• Increase acceleration time
• Check motor cables • Check for motor overload • Verify parameter settings |
| OE
DC Over-Voltage |
• Input voltage too high
• Load with large inertia • Deceleration time too short |
• Check input voltage
• Add braking resistor • Increase deceleration time |
| PF0
Output Phase Loss |
• Motor failure
• Loose motor cable • Inverter failure |
• Check motor cables
• Inspect motor |
| PF1
Input Phase Loss |
• Missing input phase | • Check power supply
• Verify parameter settings |
| OL1
Inverter Overload |
• Load too heavy | • Reduce load
• Check drive ratio • Use higher capacity inverter |
| OL2Motor Overload | • Load too heavy | • Reduce load
• Check drive ratio • Use higher capacity motor |
| OH
Radiator Overheat |
• Ambient temperature too high
• Radiator too dirty • Cooling fan failure |
• Improve ventilation
• Clean fan and radiator |
| OH1
PTC Overheat Protection |
• External thermal protection relay is triggered | • Check external thermal protection device |
| ESP
External Fault |
• External emergency stop triggered | • Check external fault device |
| CE
Communication Timeout Error |
• Communication failure | • Check communication cables
• Ensure PC/PLC sends command at fixed interval |
| AErr
Line Disconnected |
• Analog signal cable disconnected
• Signal source damaged |
• Replace signal cable
• Replace signal source |
| Err0
Modify Function Code Prohibited |
• Cannot change parameters during operation | • Modify parameters only when stopped |
| Err1
Wrong Password |
• Wrong password entered when password protection active
• Password not entered before changing parameters |
• Enter correct password |
| Err2
Parameter Tuning Error |
• Motor not connected during auto-tuning | • Connect motor properly |
| Err5
PID Parameter Error |
• PID parameters set incorrectly | • Check and correct PID settings |
Contact Kỹ Thuật Việt company for repair if the issue is hardware-related.
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