| 摘要 |
PROBLEM TO BE SOLVED: To obtain a harmonic wave in power supply suppressing device detecting a error in wiring such as an open-phase, reversed phase, and connection of a current detecting means which occur in installation work by a simple structure. SOLUTION: The device comprises a zero-cross detecting means 14 detecting a zero-cross point of an interphase voltage of a power source 1 and a current detecting means 12 detecting a current flowing into an air conditioner, which detects an open-phase error of the power supply 1 based on a signal output state between different phases in the zero-cross detecting means 14, a reversed phase error of the power supply 1 based on the signal output state between different phases in the zero-cross detecting means 14 and a phase difference between signal outputs, and therewith a connection error of the current detecting means 12 to the power supply 1 based on a signal output state in the zero-cross detecting means 14 and a current detecting result of the current detecting means 12. |
