CAUTION:
(11 If the forward (STF) and reverse (STR) start signals turn on at the same ’
time, the inverter will not start. If these signals turn on simultaneously
during operation, the motor is decelerated (the inverter output frequency
decreases) to a stop. _ .
(2) Durpng deceleration, the DC dynamic brake is actuated for 0.5 seconds when
the inverter output frequency decreases to less than the DC brake frequency
(below the start frequency, when speed reference signal voltage (or current)
is reduced gradually) .
During this DC dynamic braking period, the motor may generate a high-
pitched hum, but this is not a failure, nor a sign of trouble. This is
normal during DC braking.
(31, If “ALARM” lamp lights and the motor stops after coasting, check that the
motor has stopped completely and then reset the inveyter to shut off the
power, using the reset terminal.
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