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What can cause an OCL short circuit fault on the ATV21 or ATV212 drives?
Issue:
OCL fault on the ATV21/ATV212 drives

Product Line:
Altivar ATV21 and ATV212 including the S-Flex enclosed drives.

Environment:
All

Cause:
The ATV212 drive is tripping on OCL fault when they try and run the motor.

Resolution:
OCL means phase to phase output short circuit.  The motor impedance to ground is low.
Troubleshooting tips:
Try dropping the motor leads and meggering out the motor with a 1kv meggering if the motor checks out ok

If you need to run the drive open circuit without the motor connected:
Turn off the Drive and wait until the DC bus caps have discharged.
Turn off OPL ( F605) , set to 0  then set up F307 to 2
Now with the motor disconnected  you can run the VFD open circuit at 20  40 and 60hz.  Check your output voltage at each stage.

Schneider Electric Mexico

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