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Check first when you have a trouble
6
TROUBLESHOOTING
6.5.2 Motor or machine is making abnormal acoustic noise
6.5.3 Inverter generates abnormal noise
Parameter
Setting
Inverter decelerated to a stop when power failure
deceleration stop function is selected.
When power is restored, ensure the safety, and turn
OFF the start signal once, then turn ON again to restart.
Inverter restarts when Pr. 261="2".
156
Performing auto tuning.
When offline auto tuning ends, press of the
operation panel. For the Network operation, turn OFF
the start signal (STF or STR).
This operation resets the offline auto tuning, and the
operation panel monitor display returns to the normal.
(Without this operation, next operation cannot be started.)
127
Load
Load is too heavy. Reduce the load. —
Shaft is locked. Inspect the machine (motor). —
Others
Operation panel display shows an error (e.g. E.OC1).
When any fault occurs, take an appropriate corrective
action, then reset the inverter, and resume the
operation.
193
Check
points
Possible Cause Countermeasures
Refer
to
page
Parameter
Setting
No carrier frequency noises (metallic noises) are
generated.
In the initial setting, Pr. 240 Soft-PWM operation selection is
enabled to change motor noise to an unoffending
complex tone. Therefore, no carrier frequency noises
(metallic noises) are generated.
Set Pr. 240 = "0" to disable this function.
163
Resonance occurs. (output frequency)
Set Pr. 31 to Pr. 36 (Frequency jump).
When it is desired to avoid resonance attributable to the
natural frequency of a mechanical system, these
parameters allow resonant frequencies to be jumped.
106
Resonance occurs. (carrier frequency)
Change Pr. 72 PWM frequency selection setting.
Changing the PWM carrier frequency produces an effect
on avoiding the resonance frequency of a mechanical
system or a motor.
163
Auto tuning is not performed under Advanced magnetic
flux vector control or General-purpose magnetic flux
vector control.
Perform offline auto tuning. 127
Others
Mechanical looseness
Adjust machine/equipment so that there is no
mechanical looseness.
—
Motor
Operating with output phase loss Check the motor wiring. —
Contact the motor manufacturer.
Check
points
Possible Cause Countermeasures
Refer
to
page
Fan
Fan cover was not correctly installed when a cooling fan
was replaced.
Install a fan cover correctly. 216
Check
points
Possible Cause Countermeasures
Refer
to
page