6.12 Troubleshooting Without Fault Display
526 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
â—† The Motor Is Making an Audible Noise
Causes Possible Solutions
100% of the rated output current of the drive was exceeded while operating at
low speeds.
• 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.
â—† The Motor Will Not Restart after a Loss of Power
Causes Possible Solutions
The drive did not receive a Run command after applying power. • 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.
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.
Examine the wiring and circuitry for the relay that keeps the Run command enabled during the
momentary power loss ride-thru time.
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