LSIS S100 User Manual

Troubleshooting
239
Type
Cause
Remedy
properties and the inverter parameter are
incorrect.
The stall prevention level during
acceleration is low.
Change the stall prevention level.
The stall prevention level during
operation is low.
Change the stall prevention level.
Starting torque is insufficient.
Change to vector control operation
mode. If the fault is still not corrected,
replace the inverter with a model with
increased capacity.
Motor speed
varies during
operation.
There is a high variance in load.
Replace the motor and inverter with
models with increased capacity.
The input voltage varies. Reduce input voltage variation.
Motor speed variations occur at a specific
frequency.
Adjust the output frequency to avoid a
resonance area.
The motor
rotation is
different from the
setting.
The V/F pattern is set incorrectly.
Set a V/F pattern that is suitable for the
motor specification.
The motor
deceleration time
is too long even
with Dynamic
Braking (DB)
resistor
connected.
The deceleration time is set too long. Change the setting accordingly.
The motor torque is insufficient.
If motor parameters are normal, it is
likely to be a motor capacity fault.
Replace the motor with a model with
increased capacity.
The load is higher than the internal torque
limit determined by the rated current of
the inverter.
Replace the inverter with a model with
increased capacity.
Operation is
difficult in
underload
applications.
The carrier frequency is too high.
Reduce the carrier frequency.
Over-excitation has occurred due to an
inaccurate V/F setting at low speed.
Reduce the torque boost value to avoid
over-excitation.
While the
inverter is in
operation, a
control unit
malfunctions or
noise occurs.
Noise occurs due to switching inside the
inverter.
Change the carrier frequency to the
minimum value.
Install a micro surge filter in the inverter
output.
When the
inverter is
operating, the
earth leakage
breaker is
activated.
An earth leakage breaker will interrupt
the supply if current flows to ground
during inverter operation.
Connect the inverter to a ground
terminal.
Check that the ground resistance is less
than 100 Ω for 200 V inverters and less
than 10 Ω for 400 V inverters.

LSIS S100 Specifications

General

Brand	LSIS
Model	S100
Category	DC Drives
Language	English