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163
Check first when you have a trouble
5
TROUBLESHOOTING
Parameter
Setting
was pressed.
(Operation panel indication is (PS).)
During the External operation mode, check the method
of restarting from a input stop from PU.
146
Two-wire or three-wire type connection is wrong.
Check the connection.
Connect STOP signal when three-wire type is used.
125
Pr. 0 Torque boost setting is improper when V/F control
is used.
Increase Pr. 0 setting by 0.5% increments while
observing the rotation of a motor.
If that makes no difference, decrease the setting.
59
Pr. 78 Reverse rotation prevention selection is set.
Check the Pr. 78 setting.
Set Pr. 78 when you want to limit the motor rotation to
only one direction.
114
Pr. 79 Operation mode selection setting is wrong.
Select the operation mode which corresponds with
input methods of start command and frequency
command.
47
Bias and gain (calibration parameter C2 to C7) settings
are improper.
Check the bias and gain (calibration parameter C2 to C7)
settings.
119
Pr. 13 Starting frequency setting is greater than the
running frequency.
Set running frequency higher than Pr. 13.
The inverter does not start if the frequency setting
signal is less than the value set in Pr. 13.
104
Frequency settings of various running frequency
(such as multi-speed operation) are zero.
Especially, Pr. 1 Maximum frequency is zero.
Set the frequency command according to the
application.
Set Pr. 1 higher than the actual frequency used.
60
Pr. 15 Jog frequency setting is lower than Pr. 13 Starting
frequency.
Set Pr. 15 Jog frequency higher than Pr. 13 Starting
frequency.
105
The Pr.359 Encoder rotation direction setting is
incorrect under encoder feedback control or under
vector control.
If the "REV" on the operation panel is lit even though
the forward-rotation command is given, set Pr. 359 ="1."
33
Operation mode and a writing device do not match.
Check Pr. 79, Pr. 338, Pr. 339, Pr. 550, Pr. 551, and select
an operation mode suitable for the purpose.
62,
129
Start signal operation selection is set by the Pr. 250
Stop selection
Check Pr. 250 setting and connection of STF and STR
sign
als.
125
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, 12".
126
Auto tuning is being performed.
In the PU operation, press on the operation
panel after the offline auto tuning completes.
In the External operation, turn OFF the start signal
(STF, STR).
By this operation, offline auto tuning is cancelled, and
the monitor display on the PU goes back to normal.
(If this operation is not performed, you cannot proceed
to the next operation.)
71
Automatic restart after instantaneous power failure
function or power failure stop function is activated.
(Performing overload operation during input phase
loss may cause voltage insufficiency, and that may
result in detection of power failure.)
y Set Pr. 872 Input phase loss protection selection = "1"
(input phase failure protection active).
y Disable the automatic restart after instantaneous
power failure function and power failure stop
function.
y Reduce the load.
y Increase the acceleration time if the automatic restart
after instantaneous power failure function or power
failure stop function occurred during acceleration.
111,
126
Load
Load is too heavy. Reduce the load. —
Shaft is locked. Inspect the machine (motor). —
Check
points
Possible Cause Countermeasures
Refer
to
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