The Motor Is Making An Audible Noise; The Motor Will Not Restart After A Loss Of Power - YASKAWA HV600 Technical Reference

6.12 Troubleshooting Without Fault Display
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The Motor Is Making an Audible Noise

Causes
100% of the rated output current of the drive was exceeded while operating at
low speeds.
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The Motor Will Not Restart after a Loss of Power

Causes
The drive did not receive a Run command after applying power.
For applications that use 3-wire sequence, the momentary power loss continued
for a long time, and the relay that keeps the Run command has been switched
off.
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• If the sound is coming from the motor, set L8-38 = 0 [Carrier Frequency Reduction = Disabled].
• If oL2 [Drive Overloaded] occurs frequently after setting L8-38 = 0, replace the drive with a
high-capacity drive.
• Examine the sequence and wiring that enters the Run command.
• Set up a relay to make sure that the Run command stays enabled during a loss of power.
Examine the wiring and circuitry for the relay that keeps the Run command enabled during the
momentary power loss ride-thru time.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Possible Solutions
Possible Solutions