Troubleshooting
9.2.13 If the Motor Rotates Even When Inverter Output is Stopped
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J
Autotuning has not been performed with vector control.
D
Vector control will not perform if autotuning has not been performed. Perform autotuning separately
for the motor, or set the motor constants through calculations. Alternatively, change the control mode
selection (A1-02) to V/f control.
9.2.13 If the Motor Rotates Even When Inverter Output is Stopped
D
The DC injection braking is insufficient. If the motor continues operating at low speed, without com-
pletely stopping, and after a deceleration stop has been executed, it means that the DC injection braking
is not decelerating enough. Adjust the DC injection braking as follows:
•
Increase the constant b2-02 (DC injection braking current) setting.
•
Increase the constant b2-04 (DC injection braking time at stop) setting.
9.2.14 If 0 V is Detected When the Fan is Started, or Fan Stalls
D
Generation of 0 V and stalling can occur if the fan is turning when it is started. The DC injection braking
is insufficient when starting.
D
This can be prevented by slowing fan rotation by DC injection braking before starting the fan. Increase
the constant b2-03 (DC injection braking time at start) setting.
9.2.15 If Output Frequency Does Not Rise to Frequency Reference
J
The frequency reference is within the jump frequency range.
D
When the jump frequency function is used, the output frequency does not change within the jump fre-
quency range.
D
Check to be sure that the jump frequency (constants d3-01 to d3-03) and jump frequency width (constant
d3-04) settings are suitable.
J
The frequency reference upper limit has been reached.
D
The output frequency upper limit is determined by the following formula:
Maximum output frequency (E1-04)
×
Frequency reference upper limit (d2-01) / 100
D
Check to be sure that the constant E1-04 and d2-01 settings are suitable.
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Summary of Contents for VARISPEED-616G5
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