If The Motor Rotates Even When Inverter Output Is Stopped; If 0 V Is Detected When The Fan Is Started, Or Fan Stalls; If Output Frequency Does Not Rise To Frequency Reference - YASKAWA VARISPEED-616G5 Instruction Manual

Troubleshooting

9.2.13 If the Motor Rotates Even When Inverter Output is Stopped

9.2.13 If the Motor Rotates Even When Inverter Output is Stopped

9.2.14 If 0 V is Detected When the Fan is Started, or Fan Stalls

9.2.15 If Output Frequency Does Not Rise to Frequency Reference

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Autotuning has not been performed with vector control.
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Vector control will not perform if autotuning has not been performed. Perform autotuning separately
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for the motor, or set the motor constants through calculations. Alternatively, change the control mode
selection (A1-02) to V/f control.
The DC injection braking is insufficient. If the motor continues operating at low speed, without com-
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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.
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Increase the constant b2-04 (DC injection braking time at stop) setting.
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Generation of 0 V and stalling can occur if the fan is turning when it is started. The DC injection braking
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is insufficient when starting.
This can be prevented by slowing fan rotation by DC injection braking before starting the fan. Increase
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the constant b2-03 (DC injection braking time at start) setting.
The frequency reference is within the jump frequency range.
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When the jump frequency function is used, the output frequency does not change within the jump fre-
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quency range.
Check to be sure that the jump frequency (constants d3-01 to d3-03) and jump frequency width (constant
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d3-04) settings are suitable.
The frequency reference upper limit has been reached.
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The output frequency upper limit is determined by the following formula:
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Maximum output frequency (E1-04) × Frequency reference upper limit (d2-01) / 100
Check to be sure that the constant E1-04 and d2-01 settings are suitable.
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