LS ELECTRIC LSLV-S100 Series, User Manual, Page: 202 / 270

Troubleshooting
193
Type Cause Remedy
model with increased capacity.
The motor
rotates in the
opposite
direction to the
command.
The wiring for the motor output cable is
incorrect.
Determine if the cable on the output
side is wired correctly to the phase
(U/V/W) of the motor.
The signal connection between the
control circuit terminal (forward/reverse
rotation) of the inverter and the
forward/reverse rotation signal on the
control panel side is incorrect.
Check the forward/reverse rotation
wiring.
The motor only
rotates in one
direction.
Reverse rotation prevention is
selected. Remove the reverse rotation
prevention.
The reverse rotation signal is not
provided, even when a 3-wire
sequence is selected. Check the input signal associated
with the 3-wire operation and adjust
as necessary.
The motor is
overheating.
The load is too heavy.
Reduce the load.
Increase the Acc/Dec time.
Check the motor parameters and
set the correct values.
Replace the motor and the inverter
with models with appropriate
capacity for the load.
The ambient temperature of the motor
is too high.
Lower the ambient temperature of
the motor.
The phase-to-phase voltage of the
motor is insufficient.
Use a motor that can withstand
phase-to-phase voltages surges
greater than the maximum surge
voltage.
Only use motors suitable for
applications with inverters.
Connect the AC reactor to the
inverter output (set the carrier
frequency to 2 kHz).
The motor fan has stopped or the fan is
obstructed with debris.
Check the motor fan and remove
any foreign objects.
The motor stops
during
acceleration or
when
connected to
load.
The load is too high.
Reduce the load.
Replace the motor and the inverter
with models with capacity
appropriate for the load.
The motor does
not accelerate.
/The
acceleration
time is too long.
The frequency command value is low. Set an appropriate value.
The load is too high.
Reduce the load and increase the
acceleration time. Check the
mechanical brake status.
The acceleration time is too long. Change the acceleration time.