LSIS SV008iC5-1F User Manual

8. Troubleshooting and Maintenance
8-3
8.2 Fault Remedy
Protective
functions
Cause Remedy
Overcurrent
☞ Caution:
When an overcurrent fault occurs, operation must be started after the
cause is removed to avoid damage to IGBT inside the inverter.
 Accel / Decel time is too short
compared to the GD
2
of the load.
 Load is greater than the inverter
rating.
 Inverter output is issued when the
motor is free running.
 Output short circuit or ground fault
has occurred.
 Mechanical brake of the motor is
operating too fast.
 Increase the Accel/ Decel time.
 Replace the inverter with
appropriate capacity.
 Resume operation after stopping
the motor or use H22 (Speed
search) in Function group 2.
 Check output wiring.
 Check the mechanical brake.
Ground
fault current
 Ground fault has occurred at the
output wiring of the inverter.
 The insulation of the motor is
damaged due to heat.
 Check the wiring of the output
terminal.

Replace the motor.
Inverter
overload
 Load is greater than the inverter
rating.
 Inverter capacity is incorrectly
selected.
 Torque boost scale is set too large.
 Upgrade the capacity of motor
and inverter or reduce the load
weight.
 Select correct inverter capacity.
 Reduce torque boost scale.
Overload trip
Heat sink
overheat
 Cooling system has faults.
 An old cooling fan is not replaced
with a new one.
 Ambient temperature is too high.
 Check for alien substances
clogged in the heat sink.
 Replace the old cooling fan with
a new one.
 Keep ambient temperature
under 40
°
C.
Output
Phase loss
 Faulty contact of magnetic switch
at output

Faulty output wiring
 Make connection of magnetic
switch at output of the inverter
securely.

Check output wiring.
Cooling fan
fault
 An alien substance is clogged in a
ventilating slot.
 Inverter has been in use without
changing a cooling fan.
 Check the ventilating slot and
remove the clogged substances.
 Replace the cooling fan.
Over
voltage
 Decel time is too short compared
to the GD
2
of the load.
 Regenerative load is at the
inverter output.
 Increase the Decel time.
 Use Dynamic Brake Unit.

LSIS SV008iC5-1F Specifications

General

Brand	LSIS
Model	SV008iC5-1F
Category	DC Drives
Language	English