Noise From Drive Or Output Lines When The Drive Is Powered On; Ground Fault Circuit Interrupter (Gfci) Trips During Run; Connected Machinery Vibrates When Motor Rotates - YASKAWA AC Drive-A1000 Technical Manual

Cause
Reaching the torque limit.
Load exceeded the internal torque limit determined by
the drive rated current.
u

Noise From Drive or Output Lines When the Drive is Powered On

Cause
Relay switching in the drive
generates excessive noise.
u

Ground Fault Circuit Interrupter (GFCI) Trips During Run

Cause
Excessive leakage current trips
GFCI.
u

Connected Machinery Vibrates When Motor Rotates

n Unexpected Noise from Connected Machinery
Cause
The carrier frequency is at the resonant frequency of
the connected machinery.
The drive output frequency is the same as the resonant
frequency of the connected machinery.
Note: The drive may have trouble assessing the status of the load due to white noise generated from using Swing PWM (C6-02 = 7 to A).
n Oscillation or Hunting
Cause
Insufficient tuning.
Gain is too low when using PID control.
The frequency reference is assigned to an external
source and the signal is noisy.
The cable between the drive and motor is too long.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
• Check the settings for the torque limit (L7-01 through L7-04).
• If the torque limit is enabled, deceleration might take longer than expected because the drive
cannot output more torque than the limit setting. Ensure the torque limit is set to a high enough
value.
• Increase the torque limit setting.
• If multi-function analog input terminal A1, A2, or A3 is set to torque limit (H3-02, H3-10, or
H3-06 equals 10, 11, 12, or 15), ensure that the analog input levels are set to the correct levels.
• Ensure H3-02, H3-10, and H3-06 are set to the right levels.
• Ensure the analog input is set to the correct value (U1-13 to U1-15).
Switch to a larger capacity drive.
• Lower the carrier frequency (C6-02).
• Install a noise filter on the input side of drive input power.
• Install a noise filter on the output side of the drive.
• Place the wiring inside a metal conduit to shield it from switching noise.
• Ground the drive and motor properly.
• Separate the main circuit wiring and the control lines.
• Make sure wires and the motor have been properly grounded.
• Increase the GFCI sensitivity or use GFCI with a higher threshold.
• Lower the carrier frequency (C6-02).
• Reduce the length of the cable used between the drive and the motor.
• Install a noise filter or reactor on the output side of the drive. Set the carrier frequency to 2 kHz when connecting
a reactor.
Adjust the carrier frequency using parameters C6-02 through C6-05.
• Adjust the parameters used for the Jump frequency function (d3-01 through d3-04) to skip the
problem-causing bandwidth.
• Place the motor on a rubber pad to reduce vibration.
Perform Auto-Tuning.
Refer to Motor Performance Fine-Tuning on page
Refer to b5: PID Control on page 141
• Ensure that noise is not affecting the signal lines.
• Separate main circuit wiring and control circuit wiring.
• Use twisted-pair cables or shielded wiring for the control circuit.
• Increase the analog input time filter constant (H3-13).
• Perform Auto-Tuning.
• Reduce the length of the cable.
6.10 Troubleshooting without Fault Display
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
290.
for details.
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