LSIS LSLV-S100 - Page 399

Troubleshooting
385
Type
Cause
Remedy
Low Voltage
The input voltage is too low.
Determine if the input voltage is below
the specificed value.
A load greater than the power capacity is
connected to the system (e.g., a welder,
direct motor connection, etc.)
Increase the power capacity.
The magnetic contactor connected to the
power source has a faulty connection.
Replace the magnetic contactor.
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.