LS ELECTRIC LSLV-H100 Series, User Manual

Page: 542 / 618

529
Troubleshooting
Type Cause Remedy
Over
Current1
Acc/Dec time is too short, compared
to load inertia (GD
2
).
Increase Acc/Dec time.
The inverter load is greater than the
rated capacity. Replace the inverter with a model that
has increased capacity.
The inverter supplied an output while
the motor was idling.
Operate the inverter after the motor has
stopped or use the speed search
function (CON-70).
The mechanical brake of the motor is
operating too fast.
Check the mechanical brake.
Over
Voltage
Deceleration time is too short for the
load inertia (GD
2
).
Increase the acceleration time.
A generative load occurs at the
inverter output.
Use the braking unit.
The input voltage is too high.
Determine if the input voltage is above
the specified value.
Low Voltage
The input voltage is too low.
Determine if the input voltage is below
the specified value.
A load greater than the power
capacity is connected to the system
( 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.