The inrush current limit circuit is not built in the FR-A842 (inverter unit). It is built in the FR-CC2 (converter unit), which is combined with the FR-A842. There is an inrush current limit circuit in the outside box of the FR-HC2. Thus, there is no problem for combining the FR-A842 with the FR-HC2. When the FR-HC2 is used, the FR-CC2 is not required.