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I am using AMTECH make VFD of 60HP for blower application. One day for testing purpose disconnected output cable (motor side) from VFD and started the VFD but I observed that output frequency first raised to rated frequency and than it went down to at set frequency.
It should start from 0Hz to Set point.
So What may be the problem?
It should start from 0Hz to Set point.
So What may be the problem?