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What is OPF1 fault on Altivar 71 drive.

OPF1 (Motor phase loss) indicates the complete loss of one phase on the output.  Suggested to check all connections between the drive and the motor to ensure there is a good mechanical and electrical connection on all three phases.
The OPF1 is triggered when a current in one phase is less than 25% of nominal motor current with duration longer than output phase time detect (ODT).Increase ODT.
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