I have no particular knowledge of your Pannasonic VFD, but, by the performance, it sounds like the unit is undersized (Too few AMPS) for your motor application.
Faulting on start up is a sure sign. Though it could be the Accel rate. If the motor is unbelted, or at lease on a very light inertia load, how long does it take the spindle to come up to speed?
You need a VFD rated for your motor amp draw, and your input Voltage and Phase (1ph or 3ph)
Often, there will be strong similarities across different models from the same maker. Down load the information on the VF-C series drives from Pannasonic, and see if there are any clues for your set up.
Try again! http://www.toodoc.com/manual-inverte...sonic-pdf.html