163
Check first when you have a trouble
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.
Two-wire or three-wire type connection is wrong.
Check the connection.
Connect STOP signal when three-wire type is used.
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.
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.
Pr. 79 Operation mode selection
setting is wrong.
Select the operation mode which corresponds with
input methods of start command and frequency
command.
Bias and gain
(calibration parameter C2 to C7)
settings
are improper.
Check the bias and gain
(calibration parameter C2 to C7)
settings.
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
.
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.
Pr. 15 Jog frequency
setting is lower than
Pr. 13 Starting
frequency
.
Set
Pr. 15 Jog frequency
higher than
Pr. 13 Starting
frequency.
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."
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.
,
Start signal operation selection is set by the
Pr. 250
Stop selection
Check
Pr. 250
setting and connection of STF and STR
signals.
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".
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.)
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.
Load
Load is too heavy.
Reduce the load.
—
Shaft is locked.
Inspect the machine (motor).
—
Check
points
Possible Cause
Countermeasures
Refer
to
page
