Instruction manual

75
Details of Troubleshooting
3
SETTING WIZARD
3.4 Details of Troubleshooting
The following shows a list of causes supported in the troubleshooting. Take necessary measures upon checking the possible
causes and parameters of the inverter. Refer to the Instruction Manual of the inverter for details.
3.4.1 Motor does not rotate as commanded
• Main causes
• Causes related to V/F control
• Causes other than V/F control
Cause Measures
Related
Parameters
The set frequency is higher than the
maximum frequency (Pr. 1, 18) .
Set the maximum frequency (Pr. 1, 18) higher than the set frequency. Pr. 1, 18
The set frequency is lower than the
minimum frequency (Pr. 2).
Set the minimum frequency (Pr. 2) lower than the set frequency. Pr. 2
The set frequency is within the frequency
jump (Pr. 31 to Pr. 36 ) .
Change the range of the frequency jump Pr. 31 to Pr. 32, Pr. 33 to Pr. 34,
Pr. 35 to Pr. 36 so that the set frequency will not overlap.
Pr. 31 to 36
PID control activated Cancel PID control. Pr. 128
Stall prevention (current limit/voltage limit)
is activated.
(1) Adjust torque boost (Pr. 0, etc.)
(2) Set a larger value in acceleration/deceleration time (Pr. 7, Pr. 8,
etc.).
(3) Reduce the load weight.
(4) Try other control method.
(5) Increase stall prevention level (Pr. 22, etc.), or limit stall prevention
operation using stall prevention operation selection (Pr. 156).
(1) Pr. 0, 46, 112
(2) Pr. 7, 8, 44, 45,
110, 111
(4) Pr. 71, 80, 81,
83, 84, 96, 450,
451, 453, 454,
456, 457, 463,
800
(5) Pr. 22, 23, 48,
114, 156
Cause Measures
Related
Parameters
Torque boost setting may not be an
appropriate value.
Adjust torque boost (Pr. 0, etc.) Pr. 0, 46, 112
V/F pattern setting may not be an
appropriate value.
Adjust V/F pattern related parameters(Pr. 3, 14, 19, etc.) Pr. 3, 14, 19, 47, 113
Set frequency is unstable due to external
EMI
(1) Take EMI measures.
(2) Set a larger value in filter time constant parameter (Pr. 74, etc.).
Pr. 74, 822, 832
Load fluctuation Take measures to prevent load from changing. -
Power supply voltage fluctuation Check the power supply voltage. -
Cause Measures
Related
Parameters
Frequency fluctuation of magnetic flux
vector control
Try other control method.
Pr. 71, 80, 81, 83,
84, 96, 450, 451,
453, 454, 456, 457,
463, 800
Set frequency is unstable due to external
EMI
(1) Take EMI measures.
(2) Set a larger value in filter time constant parameter (Pr. 74, etc.).
Pr. 74, 822, 832
Load fluctuation Take measures to prevent load from changing. -
Power supply voltage fluctuation Check the power supply voltage. -