You have to look at Yasnac it is a whole different system than regular Yaskawa system here is a diagram of some of there how there control is configured I have some Yasnac manuals but they are to big to load on here you may find a PDF at the Yaskawa web site
He has done the right thing by getting a smaller rated drive 05 which will be fine for his 400w motor, just hope his motor has not been damaged by someone's bad information