Common Fault Phenomena Of Frequency Converter

1. Inverter overcurrent fault phenomenon:
1.1. When the inverter starts, it trips as soon as the speed increases and cannot start. The main reasons are: the inverter output circuit is short-circuited or grounded, the starting time is short, the voltage is low, the starting current of the responsible equipment is large, the inverter selection is small, the mechanical part is blocked; the inverter module is damaged;
1.2. The inverter trips and cannot start when it is powered on. This phenomenon generally does not require a fault reset. The main reasons are: the module is broken, the drive circuit is broken, and the current detection circuit is broken.
2. Inverter overvoltage fault phenomenon:
2.1. The input voltage is too high, and the start-up and deceleration time of the inverter is too short.
2.2. There is an external force dragging the motor to run during the shutdown process, and there is an external force dragging the motor to run during the startup process.
3. Inverter undervoltage fault phenomenon:
3.1. The power supply is instantly cut off, the inverter input voltage is not within the specification requirements, and the bus voltage is too high.
3.2. The internal rectifier bridge or drive control circuit board of the inverter is abnormal.
4. Inverter overload fault phenomenon:
4.1. Whether the mechanical equipment is too large, the motor is blocked.
4.2. The start time is set short, and the inverter power selection Small.
5. Fault phenomenon of missing items in the inverter input and output:
5.1. The three-phase input power supply is abnormal, and the wiring lead from the inverter to the motor is abnormal.
5.2. There are abnormalities in the internal drive board, module, and main control circuit board of the inverter.
6. Fault phenomenon of overheating of the inverter:
6.1. The ambient temperature of the on-site use environment is too high, and the inverter air duct is blocked.
6.2. The inverter exhaust fan fails to operate and the inverter module is damaged.
If the user encounters a fault phenomenon during the use of the inverter, he should read the product manual in time, understand the cause of the fault code, and check the inverter itself, the use environment, the load equipment, etc. to eliminate the fault. You can also contact the manufacturer's technical support in time to troubleshoot the fault. Shandong Kaichuan Electric Power Equipment Co., Ltd. is a professional inverter manufacturer with rich on-site technical experience. Please contact us and hope we can help you.