The most professional inverter repair center, especially good at drive board maintenance, switching power supply repair, elevator circuit board repair, PLC circuit board repair, touch screen circuit board repair and various industrial equipment maintenance inverter heat sink overheating oh1 is also a comparison Common faults, main reasons: check and check whether the inverter control terminals (13, 12, 11) are short-circuited; check whether the temperature sensor detection circuit is normal; also check whether the cooling fan of the inverter is running normally; Whether the heat sink is clogged; the ambient temperature is too high. Scaffolding Accessories,Water Stop Nut,Ductile Water Stop Nut,Casting Forging Water Stop Nut J.B Machinery (Ningbo) Co., Ltd. , https://www.jbdrill.com
Example analysis: A Fuji frn15g11—4cx inverter, power-on display heat sink overheating (oh1). Analysis and maintenance: Because the inverter is newly installed, there is a fault after power transmission, so the possibility of the inverter being bad is not great; the heat sink is not blocked; the cooling fan is running normally. After the power is cut off, test the analog input circuit with a multimeter and check the short circuit between the inverter control terminals (13, 12, 11). The reason is that the external frequency setting of the analog input circuit sets the "potentiometer" resistance value too small. Replace it with wxwxx0.25-1, 0.25w 47~4.7k potentiometer. After power-on, the inverter runs well and there is no such fault during operation. Shanxi Taiyuan inverter repair http://news.chinawj.com.cn 
Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn