The Motor Is Making An Audible Noise; The Motor Will Not Restart After A Loss Of Power - YASKAWA GA700 Series Technical Manual

Ac drive for industrial applications

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7.10 Troubleshooting Without Fault Display

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

100% of the rated output current of the drive was exceeded while operating

at low speeds.

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.

Possible Solutions

Check whether the V/f pattern and motor parameter settings are appropriate, and set them

If this does not solve the problem, and it is not necessary to limit the current level of stall

during acceleration, adjust L3-02.

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 =

• 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.

YASKAWA SIEPC71061705H GA700 Series Technical Manual