LSIS S100 User Manual

240
Troubleshooting
Type
Cause
Remedy
Check the capacity of the earth leakage
breaker and make the appropriate
connection, based on the rated current
of the inverter.
Lower the carrier frequency.
Make the cable length between the
inverter and the motor as short as
possible.
The motor
vibrates severely
and does not
rotate normally.
Phase-to-phase voltage of 3-phase power
source is not balanced.
Check the input voltage and balance
the voltage.
Check and test the motor’s insulation.
The motor makes
humming, or
loud noises.
Resonance occurs between the motor's
natural frequency and the carrier
frequency.
Slightly increase or decrease the carrier
frequency.
Resonance occurs between the motor's
natural frequency and the inverter’s
output frequency.
Slightly increase or decrease the carrier
frequency.
Use the frequency jump function to
avoid the frequency band where
resonance occurs.
The motor
vibrates/hunts.
The frequency input command is an
external, analog command.
In situations of noise inflow on the
analog input side that results in
command interference, change the
input filter time constant (IN-07).
The wiring length between the inverter
and the motor is too long.
Ensure that the total cable length
between the inverter and the motor is
less than 200m (50m for motors rated
3.7 kW or lower).
The motor does
not come to a
complete stop
when the
inverter output
stops.
It is difficult to decelerate sufficiently,
because DC braking is not operating
normally.
Adjust the DC braking parameter.
Increase the set value for the DC
braking current.
Increase the set value for the DC
braking stopping time.
The output
frequency does
not increase to
the frequency
reference.
The frequency reference is within the
jump frequency range.
Set the frequency reference higher than
the jump frequency range.
The frequency reference is exceeding the
upper limit of the frequency command.
Set the upper limit of the frequency
command higher than the frequency
reference.
Because the load is too heavy, the stall
prevention function is working.
Replace the inverter with a model with
increased capacity.
The cooling fan
does not rotate.
The control parameter for the cooling fan
is set incorrectly.
Check the control parameter setting for
the cooling fan.

LSIS S100 Specifications

General

Brand	LSIS
Model	S100
Category	DC Drives
Language	English