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Mounting position 2 (Frame A~D)
Cable
Q Why do I get LV-error even if the voltage is >LV-level (supplying 230VAC to a
400V drive)?
A In Pr06-00 you can set the LV-level. For a 400V drive, the minimum setting value is
300VDC. When the drive is supplied with 230VAC, the DC-bus voltage is around
230*√2=325V
DC
which is higher than 300V
DC
so LV is not expected.
But in order to “cancel” LV, the DC-bus voltage must become >(Pr06-00 +60V
DC
*)
which in this case never happens. Therefore LV stays and cannot be reset.
Note: For 230V drives, this value is +30V
DC
.
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