Chapter 14 Fault CodesMH300
ID No.
Display Fault Name Description
40
Auto-tuning error
(AUE)
Motor auto-tuning error
Action and Reset
Action condition Hardware detection
Action time Immediately act
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Immediately reset
Record Yes
Cause Corrective Actions
Press STOP key during auto-
tuning.
Re-execute auto-tuning.
Incorrect motor capacity (too
large or too small) and
parameter setting
Check motor capacity and related parameters.
Set the correct parameters, that is Pr.01-01–01-02.
Set Pr.01-00 larger than motor rated frequency.
Incorrect motor wiring Check the wiring.
Motor shaft lock Remove the cause of motor shaft lock.
The electromagnetic contactor
is ON at output side (U/V/W) of
the drive
Make sure the electromagnetic valve is OFF.
The load is too large.
Reduce the load.
Replace the motor with a larger capacity model.
Accel. / Decel. time is too short.
Increase the setting values for Pr.01-12–01-19 (Accel. / Decel. time).
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