LS Industrial Systems iG5A - ARM Short Current Fault Trip; Ground Fault Trip

2. Troubleshooting
22
LCD Display
Type
Description
Over
Current2
Latch
Displayed when the DC circuit in the inverter detects a
specified level of excessive, short circuit current..
Cause
Remedy
Acc/Dec time is too short,
compared to load inertia (GD2).
Increase Acc/Dec time.
Output wiring is short-circuited.
Check the output wiring.
There is a inverter-motor
connection problem.
Check the output wiring
Ensure that the total cable length between the inverter and the motor
is less than 200m (50m for motors rated 3.7 kW or lower).
There is a fault with the output
module (IGBT).
Refer to 3.1.4 Checking the Input/Output Modules on page38 and
check a fault with the output module(IGBT)
Do not operate the inverter. Contact the retailer or the LSIS customer
service center.
LCD Display
Type
Description
Ground
fault Trip
Latch
The inverter turns off its output when a ground fault occurs
and the ground fault current is more than the internal
setting value of the inverter.
Cause
Remedy
A ground fault has occurred in
the inverter output wiring.
Check the output wiring.
There is a inverter-motor
connection problem.
Check the output wiring
Ensure that the total cable length between the inverter and the motor
is less than 200m (50m for motors rated 3.7 kW or lower).
The motor insulation is
damaged.
Replace the motor.
Noise occurs in the peripherals
Change the carrier frequency to the minimum value in H39