LS ELECTRIC LSLV-H100 Series, User Manual

Page: 545 / 618

Troubleshooting
532
Type Cause Remedy
The PNP/NPN mode is selected
incorrectly.
Check the PNP/NPN mode setting.
The frequency command value is too
low.
Check the frequency command
and input a value above the
minimum frequency.
The [OFF] key is pressed.
Check that the stop state is normal,
if so resume operation normally.
Motor torque is too low.
Increase the volume of the torque
boost. If the fault remains, replace
the inverter with a 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.