2. Troubleshooting
20
2.1.2 Troubleshooting Fault Trips
Refer to the following tables for solutions to fault trips or warnings.
Occurs when the motor load exceeds the value that was set
for the motor overload trip. Operation will resume after
setting Pr.20 at a value other than 0.
The load is greater than the motor’s
rated capacity.
Make sure the motor and inverter has the appropriate capacity
ratings. Replace the motor and inverter that has a bigger capacity.
The value set for overload trip level
(Pr.21) is too small.
Increase the setting value.
Occurs when the motor load is less than the value that was
set for the motor underload level. Operation will resume after
setting Pr.27 at a value other than 0.
There is a problem with the
connection between the motor and
the load.
Replace the motor and inverter that has a bigger capacity.
The underload level (Pr.20, 30) is
lower than the minimum load.
Increase the setting value.
Occurs when the Inverter output current exceeds 200% of
the rated current.
Acc/Dec time is too short compared
to the load inertia (GD2).
Inverter load is greater than the
rated capacity.
Replace the inverter that has a bigger capacity.
The inverter produced an output
while the motor was not operating.
Operate the inverter after the motor 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 /
Ground fault occurred.
Remove the short circuit. Check the motor for ground fault.
There is a problem in the wiring
between the inverter and the motor.
Check the output wiring as well as the recommended specifications
of the wiring length, thickness, etc. Make sure that the total cable
length between the inverter and the motor is less than 200m (50m for
motors rated 3.7kW and lower).
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