The Motor Is Making An Audible Noise; The Motor Will Not Restart After A Loss Of Power - YASKAWA GA800 Technical Reference

Causes
L3-01 = 3 [Stall Prevent Select duringAccel = ILim Mode] has been set.
The motor is rotating at this speed:
b2-01 [DC Injection/Zero SpeedThreshold] ≤ Motor Speed < E1-09 [Minimum
Output Frequency]
◆

The Motor Is Making an Audible Noise

Causes
100% of the rated output current of the drive was exceeded while operating at
low speeds.
◆

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.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
7.10 Troubleshooting Without Fault Display
Possible Solutions
1. Check whether the V/f pattern and motor parameter settings are appropriate, and set them
correctly.
2. If this does not solve the problem, and it is not necessary to limit the current level of stall during
acceleration, adjust L3-02.
3. If this does not solve the problem, set L3-01 = 1 [Enabled].
• Set b1-21 = 1 [CLV Start Selection = Accept Run command at any speed].
• Set E1-09 < b2-01.
Possible Solutions
• 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.
Possible Solutions
• 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.
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