text: <s>[INST] PF700S DC Bus Drive / Voltage Feedback Error We are stuck with a rather odd drive:20DR125xxxxxx Basically a 125Amp PF 700S Drive, Frame 5 with a 650VDC Common Bus input.We are having a Loss of Voltage Feedback error; which links to Parameter 394.However, unlike the larger drives (above Frame 9), I cannot find any information about a voltage feedback board (Part number: SK-H1-SVFB2-E1 on the larger drives). So I don't know how this error is generated. We have checked the connections multiple times, and have had no luck. If I disable this parameter, the drive basically becomes a PF700VC...as the big difference between the VC and S is the motor voltage feedback and control....and I need the S control in this application.Any help of suggestions would be appreciated. Unrelated to this, does anyone know if there is a drawing showing all of the Boards / componenets on the PF 700 Drives along with their interconnections. [/INST] Rob, Please call tech support at 262.512.8176 for further information. The voltage feedback board on Frames 6 and below are mounted on top of the switch mode power supply. On the Frame 6 it can be replaced in the field however, we do not offer a spare part kit.On the frame 5 it is a little harder to replace in the field, however it is possible. If the drive is still under warranty than have your distrubutor do an advance exchange. We do have connection diagrams for frame 9 and higher because the boards are accessable. Todd JaremkoTech Support \\n </s>