LSIS LSLV-S100 - Page 354

340
Troubleshooting
Type
Cause
Remedy
Low Voltage2
The input voltage has decreased during the
operation.
Determine if the input voltage is above
the specified value.
An input phase-loss has occurred.
Check the input wiring.
The power supply magnetic contactor is
faulty.
Replace the magnetic contractor.
Ground Trip
A ground fault has occurred in the inverter
output wiring.
Check the output wiring.
The motor insulation is damaged.
Replace the motor.
E-Thermal
The motor has overheated.
Reduce the load or operation frequency.
The inverter load is greater than the rated
capacity.
Replace the inverter with a model 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 LSIS 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 LSIS 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 LSIS customer
service center.
FAN Lock
A foreign object is obstructing the fan’s air
vent.
Remove the foreign object from the air
inlet or outlet.
The cooling fan needs to be replaced.
Replace the cooling fan.