Improper usage or an unreasonable setup environment can easily lead to incorrect operation and faults in the variable-frequency inverter, or fail to meet the expected performance. To prevent potential issues, it is crucial to conduct a thorough analysis of the fault causes in advance.
How to Check for Inverter Faults.
After a variable-frequency inverter experiences an output line fault, an error code is typically displayed on the LED. Each variable-frequency inverter's error code conveys different information, so the corresponding inverter manual should be consulted. Online error code lookup is very convenient, as the system can find fault information for mainstream variable-frequency inverters on the market. By following the "Industrial View" WeChat official account, simply input the variable-frequency inverter error code, and you can see the corresponding fault information. This feature is free to use.
External electromagnetic induction interference.
If there are interference sources around the inverter, they can侵入 the inverter's internal circuitry through radiation or power lines, causing incorrect operation of the control loop and resulting in abnormal operation or shutdown. In severe cases, it can even damage the inverter. While improving the inverter's own anti-interference ability is important, due to cost constraints of the equipment, it is more reasonable and necessary to take noise measures externally to eliminate interference sources. The following measures are specific methods to implement the "three no" principle for noise interference: all control coils of relays and contactors around the inverter must be equipped with surge voltage absorption devices, such as RC absorbers; try to shorten the wiring distance of the control loop and separate it from the main circuit; use shielded wire circuits in accordance with regulations, and adopt reasonable relay methods if the lines are long; the inverter's grounding terminal should be grounded according to regulations and should not be mixed with electric welding or power grounding; install noise filters at the inverter's input terminal to avoid interference introduced through the power line.
