224
Symptoms Conditions Possible causes Solutions
When the
drive is
started, the
report -LU-
runs
immediately
.
The thyristor or the
contactor disconnects
and the drive load is
large.
Since the thyristor or the contactor
is not closed, when the drive
runs with large load, the DC bus
voltage of the main circuit will drop;
the drive will display -LU- first
and will not display Er.JCF fault.
Run the drive after the thyristor or the contactor
is closed completely
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