2. Troubleshooting
21
2.1.2 Troubleshooting Fault Trips
When a fault trip or warning occurs due to a protection function, refer to the following table for possible
causes and remedies.
Displayed when inverter output current exceeds 200% of
the rated current.
Acc/Dec time is too short,
compared to load inertia (GD2).
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 (Cn.60).
The mechanical brake of the
motor is operating too fast.
Check the mechanical brake.
Output wiring is short-circuited or
a ground fault has occurred.
Remove a short circuit and ground fault and check the motor
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.
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