text: <s>[INST] PF 700 F5 Fault - Summary: Is this a bad cap problem or do I replace the drive2009 PF700 throwing an F5 Fault the instant the motor is called to run. Troubleshooting guide says that if this happens when the drive is accelerating its most likely incoming voltage. . . Incoming voltage is fine, Input Waveform gets distorted when drive attempts to start the motor (as the pic below shows). Motor tests fine. Buss voltage is around 750VDC when not being called to run Is there a capacitor issue at play here or does the drive just need to be replaced [/INST] Sounds like your AC line is high. The DC bus on a 480V drive should be around 680V when stopped (480 * sqrt(2) = 678.8). From the screen shot of your power quality meter the AB voltage is almost 500V. Verify the taps on the incoming transformer are set correctly. \\n </s>