7.2 Common Faults and Remediation Procedures
7.2 Common Faults and Remediation Procedures
During the operation of the inverter, you may encounter the following faults. Please refer to the following methods for simple fault analysis:
Common Faults and Remediation Procedures for Inverters
| No. | Fault Phenomenon | Possible Causes | Solutions |
|---|---|---|---|
| 1 | No display after power on | 1. Absence or low voltage of the power supply 2. Faulty switch power supply on the drive board 3. Damaged rectifier bridge 4. Damaged buffer resistor of the inverter 5. Faulty control board, keyboard, or keyboard cable 6. Broken connection wire between the control board, drive board, and keyboard |
1. Check the input power supply 2. Seek service from the inverter manufacturer 3. Check the bus voltage 4. Seek service from the inverter manufacturer 5. Replace the keyboard cable or contact the inverter manufacturer 6. Seek service from the inverter manufacturer |
| 2 | Repetitive display of [ ] after power on | 1. Poor contact between the drive board and control board 2. Faulty components on the control board 3. Low voltage of the power supply 4. Issues with the switch power supply on the drive board |
1. Replug the mainboard pin header 2. Seek service from the inverter manufacturer 3. Check the voltage of the power supply 4. Seek service from the inverter manufacturer |
| 3 | ERR23 displayed after power on | 1. Short circuit between the motor or output lines and ground 2. Inverter damage |
1. Use a megger to measure the insulation of the motor and output lines 2. Seek service from the inverter manufacturer |
| 4 | Normal display after power on, then displaying [ ] and stopping immediately during operation | 1. Fan damaged or jammed 2. Short circuit in peripheral control terminal connections |
1. Replace the fan 2. Eliminate external short circuit faults 3. Seek service from the inverter manufacturer |
| 5 | Frequent ERR14 (module overheating) faults | 1. Carrier frequency set too high 2. Fan damaged or air duct blocked 3. Damage to internal components of the inverter (thermocouple or others) |
1. Reduce the carrier frequency (P0-15) 2. Replace the fan and clear the air duct 3. Seek service from the inverter manufacturer |
| 6 | Motor does not rotate after inverter operation | 1. Poorly connected motor wires 2. Incorrect parameter settings of the inverter (motor parameters) 3. Poor contact between the drive board and control board 4. Faulty drive board |
1. Reconfirm the wiring between the inverter and the motor 2. Replace the motor or clear mechanical faults 3. Check and reset the motor parameters 4. Seek service from the inverter manufacturer |
| 7 | Inverter frequently reports overcurrent and overvoltage faults | 1. Incorrect motor parameter settings 2. Inappropriate acceleration and deceleration times 3. Load fluctuations |
1. Reset the motor parameters or perform motor tuning 2. Set appropriate acceleration and deceleration times 3. Seek service from the inverter manufacturer |
Explore these documents for more information: