POWER CONVERSION DEVICE AND AIR CONDITIONER

摘要

PROBLEM TO BE SOLVED: To detect a failure in a power factor improvement unit.SOLUTION: A power conversion device includes: a rectifier unit (22) for rectifying an input alternate current; a power factor improvement unit (25) for performing power factor improvement operation to an input voltage (V1) output from the rectifier unit (22); a power conversion unit (28) connected to the output of the power factor improvement unit (25) for generating an output AC power; and a control unit (31) for control the power factor improvement unit (25). The control unit (31) determines the power factor improvement unit (25) is in failure if the change of the output voltage (V2) of the power factor improvement unit (25) does not follow the presence or absence of a command from the control unit (31) to instruct to perform power factor improvement operation.