Instruction manual

143
 Troubleshooting
Trouble Cause Corrective Actions
The motor does not
operate when an
external operation
signal is input.
The operation method selection is
wrong.
The run command (n003) is not set
to Control Circuit Terminal.
Set the run command (n003) to
Control Circuit Terminal.
The motor stops.
The torque is not
output.
The stall prevention level during
acceleration is too low.
Because the stall prevention level
during acceleration (n093) is set too
low, the output current reaches the
set level, the output frequency is
stopped, and the acceleration time is
lengthened.
Check if the stall prevention level
during acceleration (n093) is set to
an appropriate value.
A 3-wire sequence is in effect.
The multi-function input method
(n052) is set to 3-wire sequence,and
the S2 control terminal is not closed.
To use a 3-wire sequence, make
the wiring so that the S2 control
terminal is closed. To use a
2-wire sequence, set the multi-
function input (n052) to a value
other than 3-wire sequence.
Local mode is in effect. Set the LO/RE selection of the
digital operator to RE.
The SW setting for the reference
selection is wrong.
Example: The reference 4-20mA is
input, but the SW is set to " V ".
For analog input, make sure that
the frequency reference (n004)
and SW settings are correct.
The stall prevention level during
running is too low.
Because the stall prevention level
during running (n094) is set too low,
the output current reaches the set
level, and the speed drops.
Check if the stall prevention level
during running (n094) is set to an
appropriate value.
The load is too heavy.
If the load is too heavy, stall
prevention is activated, the output
frequency is stopped, and the
acceleration time is lengthened.
Lengthen the set acceleration time
(n019). Reduce the load.
When the maximum frequency was
changed, the maximum voltage
frequency was also changed.
To increase the speed of a
general-purpose motor, only
change the maximum frequency.
The V/f set value is too low. Set the V/f (n011 to n017)
according to the load
characteristics.
The frequency reference is too low.
The input frequency reference is
lower than the setting for the
min.output frequency (n016).
Input a frequency reference
greater than the min. output
frequency (n016).