POWER CONVERSION DEVICE AND PROGRAM

A power conversion device includes: a high-potential-side path electrically connecting a first power storage and an upper arm switch; a low-potential-side path electrically connecting a second power storage and a lower arm switch; a power-storage-to-power-storage switch; a bypass switch; a connection path; a neutral point capacitor; a current sensor detecting a current flowing through the connection path or a current flowing through an armature winding; and a controller. The controller performs a temperature rise control in which to cause a ripple current to flow through the first and second power storages, at least one of the upper and lower arm switches is switched in a state where the bypass switch is on and the power-storage-to-power-storage switch is off, and determines whether an abnormality in the temperature rise control occurs based on a detection value of the current sensor during the temperature rise control.