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How do I fix an F11 Output Phase Faultcode for a DG1 drive?

The output phase fault is looking for the loss of current draw or a significant difference in current draw on the output of the drive. The drive looks at the 3 output phases (U,V,W) and takes the maximum and minimum value of the 3 phases. If the maximum current value is greater than 3 times the current minimum and the current minimum is greater than 0.03, the output phase fault will be triggered. The first thing to do with this fault is to disconnect he output of the drive and start the drive. If the drive faults on output phase fault loss there is something wrong with the current measurement on the output of the drive. If it does not fault ramp the drive up to max frequency and check the voltage on the output of the drive. Normally if the fault is coming from the drive it is because it is not firing one of the phases and this can be seen by measuring the voltages on the output will not be equal. If they are equal then run the drive on a test motor and check the 3 phase currents on the output and compare that to the monitored values of all 3 phases. If these are equal and everything looks good on a test motor, connect the original motor back up and try the same. If the drive trips right away an oscilloscope may be required to be able to read the currents. If the currents are uneven at this point check the motor and its connections in the motor junction box.