LS ELECTRIC LSLV-S100 Series, User Manual, Page: 200 / 270

Troubleshooting
191
Type Cause Remedy
rated capacity.
that has increased capacity.
The set value for electronic thermal
protection is too low.
Set an appropriate electronic thermal
level.
The inverter has been operated at low
speed for an extended duration.
Replace the motor with a model that
supplies extra power to the cooling
fan.
Output Phase
Open
The magnetic contactor on the output
side has a connection fault.
Check the magnetic contactor on the
output side.
The output wiring is faulty. Check the output wiring.
Input Phase
Open
The magnetic contactor on the input side
has a connection fault.
Check the magnetic contactor on the
input side.
The input wiring is faulty. Check the input wiring.
The DC link capacitor needs to be
replaced.
Replace the DC link capacitor.
Contact the retailer or the LS
ELECTRIC customer service center.
Inverter OLT
The load is greater than the rated motor
capacity.
Replace the motor and inverter with
models that have increased capacity.
The torque boost level is too high. Reduce the torque boost level.
Over Heat
There is a problem with the cooling
system.
Determine if a foreign object is
obstructing the air inlet, outlet, or
vent.
The inverter cooling fan has been
operated for an extended period.
Replace the cooling fan.
The ambient temperature is too high.
Keep the ambient temperature below
50
℃
.
Over
Current2
Output wiring is short-circuited. Check the output wiring.
There is a fault with the electronic
semiconductor (IGBT).
Do not operate the inverter. Contact
the retailer or the LS ELECTRIC
customer service center.
NTC Open
The ambient temperature is too low.
Keep the ambient temperature above
-
10 ℃ .
There is a fault with the internal
temperature sensor.
Contact the retailer or the LS
ELECTRIC customer service center.
FAN Trip /
FAN Warning
A foreign object is obstructing the fan’s
air vent. Remove the foreign object from the
air inlet or outlet.
The fan connector is not connected. Connect the fan connector.
The cooling fan needs to be replaced. Replace the cooling fan.