LS Industrial Systems iG5A - Output Open-Phase Fault Trip; Over Voltage Trip; Cooling Fan Fault

2. Troubleshooting
24
LCD Display
Type
Description
Output
Phase
Open
Latch
Displayed when a 3-phase inverter output has one or more
phases in an open circuit condition.
Cause
Remedy
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.
LCD Display
Type
Description
Cooling
Fan
Trip
Latch
Displayed when a fault condition occurs in the inverter
cooling fan..
Cause
Remedy
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. (Refer to 3.1.3 Replacement of the cooling
fan)
LCD Display
Type
Description
Over
Voltage
Trip
Latch
The inverter turns off its output if the DC voltage of the main
circuit increases higher than 400 V when the motor
decelerates. This fault can also occur due to a surge
voltage generated at the power supply system.
Cause
Remedy
The input voltage is too high.
Determine if the input voltage is above the specified value.
The actual DC link voltage is
different from the displayed
value..
Need to inspect hardware. Contact the retailer or the LSIS customer
service center.
Deceleration time is too short for
the load inertia (GD2).
Increase the acceleration time.
A generative load occurs at the
inverter output.
Use the braking unit.