A control device for a power conversion device that is capable of detecting current abnormality of the power conversion device with no delay is provided. The control device for the power conversion device includes a current detection unit for outputting an error signal when a detection value of a current sensor for detecting current flowing through the power conversion device is larger than a preset overcurrent determination value, and outputting a state detection value larger than a value corresponding to the error signal based on the error signal, and an abnormality detection unit for accepting an input of the state detection value of the current detection unit via the wiring, and an abnormality detection unit for outputting an error signal when the state detection value of the current detection unit is larger than a preset overcurrent abnormality determination value, and detecting abnormality based on the error signal.