Troubleshooting - YASKAWA VS-606V7 Series Instruction Manual

Troubleshooting

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