POWER CONVERSION DEVICE AND METHOD FOR DETERMINING STATE OF POWER CONVERSION DEVICE

摘要

To make it possible to determine the state of a relay even when the relay does not have an answer-back function. A relay controller (28) outputs a drive signal for opening/closing the relay (22). A detector (27) detects the drive signal outputted from the relay controller (28) to the relay (22). A determining unit (29) determines whether the relay (22) is normal or abnormal on the basis of a control state signal outputted from the relay controller (28) indicating the open/close state of the relay (22) and the result of the detection by the detector (27).