LSIS S100 Series Troubleshooting Manual

2. Troubleshooting
30
The motor vibrates intensely and does not rotate normally.
Problem
Solution
The phase-to-phase voltage of 3-phase power
source is not balance.
Check the input voltage and stabilize the voltage.
Check and test the insulation of the motor.
The motor makes humming or loud noises.
Problem
Solution
There is resonance between the motor’s natural
frequency and the carrier frequency.
Slightly change the carrier frequency in code H39.
There is resonance between the motor’s natural
frequency and the inverter’s output frequency.
Slightly change the carrier frequency in code H39.
Use the frequency jump function to avoid resonance.
The motor vibrates / hunts.
Problem
Solution
The frequency input demand was externally set
to analog command.
Change the input filter time constant (In.07) if there are
interferences in the frequency command due to noise
from the analog input side.
The wiring between the motor and inverter is
too long.
Make sure that the total cable length between the inverter
and the motor is less than 150m (50m for motors rated
3.7kW and lower).
The motor does not stop completely when the inverter output stopped.
Problem
Solution
The motor cannot decelerate sufficiently due to
malfunction of the DC braking.
Adjust the DC braking parameter.
Increase the set value for DC braking current.
Increase the set value for the DC braking stopping time.
Free run stop was selected.
Change the stopping method to decelerating.
The output frequency does not reach the target frequency.
Problem
Solution
The target frequency is within the jump
frequency range.
Set the target frequency higher than the jump frequency
range.
The target frequency is higher than the upper
limit of the frequency command.
Set the upper limit of the frequency command higher than
the target frequency.

LSIS S100 Series Specifications

General

Brand	LSIS
Model	S100 Series
Category	Controller
Language	English