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What is the cause of the EF2 fault code on the ATV21 and ATV212 drives?
Issue:
ATV212: EF2 Fault

Product line:
Altivar ATV212

Environment:
All models, all serial numbers

Cause:
Ground Fault on the output of the drive.

Resolution:
EF2= Ground Fault

Troubleshooting tips
  • Check the motor ground connections. Make sure the ground is going to the chassis of the drive.
  • Remove the motor leads from the drive and Megger with a 1KV Megger to see if there is a short to ground in the motor windings.

Reference the ATV212 programming manual S1A53838 (attached).

ef2 atv212

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ATV212_programming_manual_EN_S1A53838_03.pdf [3.53 MB]
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