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ATV312 What causes a short circuit fault?

Issue:
Altivar drive is getting short circuit fault "SCF" .

Product line:  
Altivar 61/71/12/312

Environment:  
All models, all serial numbers   

Cause:
Possible improper gating

Resolution:
Voltage Balance Test Instructions ATV61/71
1.  Disconnect the motor
2.  Make sure the drive is in variable torque mode. ( -  Menu 1.4 Motor control - change [motor control type] to VF2pts. )
3.  Set Output Phase Fault to "No" (  - Menu 1.8 Fault Management - change [output phase loss] to ignore)  With a True RMS volt meter run the drive at low (15 Hz), medium (30 Hz) and high (60 Hz) speeds.  At each speed measure the voltage between phase to phase.  All measurements should be balanced within a volt or two. With a True RMS volt meter run the drive at low (15 Hz), medium (30 Hz) and high (60 Hz) speeds.  At each speed measure the voltage between phase to phase.  All measurements should be balanced within a volt or two.
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