7-24
The motor does not accelerate.
If the torque limit settings (L7-01 to L7-04) or the torque reference input (torque control) are too small, the
motor may not be able to accelerate. Check the settings and input values.
The motor only rotates in one direction.
"Reverse run prohibited" is selected. If b1-04 (Prohibition of Reverse Operation) is set to 1 (reverse run pro-
hibited), the Inverter will not receive Reverse Run Commands. To use both forward and reverse operation, set
b1-04 to 0.
The frequency reference is
too low.
The frequency reference has to be set above
the frequency set in E1-09 (Minimum Out-
put Frequency).
If the indicator on the STOP Key is flash-
ing, check the frequency reference moni-
tor (U1-01) and set the frequency
reference above the frequency set in E1-
09.
The frequency reference
selection is wrong.
b1-01 has to be set according to the fre-
quency reference input method to be used.
b1-01=
0: Digital Operator
1: Control circuit terminal (factory setting)
2: MEMOBUS communications
3: Option board
4: Pulse train input
Set b1-01 according to the frequency ref-
erence input method to be used.
The MENU Key was
pressed.
If the MENU Key is pressed once or the
ESC Key is pressed twice, the Inverter will
exit the drive mode and will not operate. If
the MENU Key is pressed during operation,
the Inverter will not start even if the Run
Command is sent at the next operation.
• Press the DATA/ENTER Key.
• Try turning the power supply off and on
again.
• Set b8-01 (Run Command selection in
programming modes) to 1(Cannot oper-
ate) to remain in the drive mode and
continue operation even if the MENU
Key or ESC Key is pressed.
The ESC Key was pressed
twice.
The LOCAL/REMOTE Key
was pressed.
If the LOCAL/REMOTE Key is pressed
while the Inverter is stopped, the Inverter
will switch to Digital Operator operation
and cannot be operated with the external
input terminals.
• Press the LOCAL/REMOTE Key.
• Try turning the power supply off and on
again.
• Set o2-01 (LOCAL/REMOTE Key
enable/disable) to 0 (Disabled) to dis-
able the LOCAL/REMOTE Key.
The STOP Key was
pressed.
If the STOP Key is pressed during opera-
tion, the Inverter will decelerate to a stop.
• Turn the Run Command off and then on
again.
• Set o2-02 (STOP key during control cir-
cuit terminal operation) to 0 (Disabled)
to disable the STOP Key.
Wrong selection of a 2-wire
or a 3-wire sequence.
If 0 is set to one of H1-01 to H1-10, a 3-
wire sequence is set.
Make sure that H1-01 to H1-10 are set to a
value other than 0 to use a 2-wire
sequence.
“Reverse run prohibited” is
selected.
If b1-04 (Prohibition of reverse operation)
is set to 1 (Reverse disabled), the motor will
not start if the Reverse Run Command is
sent.
Check the setting of b1-04.
Autotuning has just been
completed.
The Inverter remains in the autotuning
mode right after autotuning has been com-
pleted and cannot be operated even if the
Run Command is sent.
Press the MENU Key to display the drive
mode on the Digital Operator and press
the DATA/ENTER Key to enter the drive
mode.
Probable Causes Descriptions Corrective Actions
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