LS Starvert-iG5A - Fault Trip Troubleshooting (Continued); Over Load and Open Circuit Faults; Voltage, Parameter, and Hardware Faults

Input phase
open
 The magnetic contactor on
the input side has a
connection fault.
 The input side wiring has
one or more phases in an
open circuit condition.
 The capacitor inside the
inverter is broken due to
long-term use.
 Check the magnetic
contactor.
 Check the input cables.
 Replace the capacitor.
Note
The input phase open trip mode can be set by
adjusting the parameter.
Output
phase open
 The magnetic contactor on
the output side has a
connection fault.

Output side wiring is faulty
,or the 3-phase inverter
output has one or more
phases in an open circuit
condition.
 IGBT is faulty.
 Check the magnetic
contactor.
 Check the output cables.
 Contact the supplier.
Note
The output phase open trip mode can be set by adj
usting the parameter.
Keypad
display
Cause Remedy
Over
voltage
 Deceleration time is too
short for load inertia
(GD2).
 Regenerative load is at the
inverter output.
 Input voltage is too high.
 Increase the acceleration
time.
 Use the braking unit.
 Ensure the input voltage is
at the specified value.
Low voltage
 Input voltage too low.
 A load greater than the
power capacity is
connected to the inverter.
(e.g., a welder, direct
motor connection, etc.).
 The magnetic contactor on
the input side has a
connection fault.
 Ensure the input voltage is
at the specified value
 Increase the power
capacity.
 Replace the magnetic
contactor.
 Parameter saving fault.
 Reconnect the loader
cables.
 If the fault occurs
continuously, contact the
supplier.
 Loader fault.
 Communication error
between the loader and
inverter.
 Contact the supplier.  Hardware fault.
 Insulated Gate Bipolar
Transistor (IGBT)
temperature sensor fault.
Fault trip troubleshooting Fault trip troubleshooting
- 9 - - 10 -
Keypad
display
Cause Remedy
Inverter
over load
Over load
trip

The load is higher than the
inverter rating.
 Ensure the motor and the i
nverter are correctly rated.
Note
The difference between OLT and IOLT is the
reference current (OLT-motor's rated current,
IOLT-inverter's rated current).