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What can cause an EPHI fault on the ATV21 and ATV212 drives?

Issue:
What can cause an EPHI fault on the ATV21 and ATV212 drives?
Product Line:
Altivar ATV21, ATV212 and S-Flex
Environment:
All
Cause:
Input fuse is blown or missing voltage on the input of the drive.
Resolution:
EPHI is an Input phase loss,   Check all the input connections to the drive.  Check with a digital meter  to see if you have good voltage on your input leads of the drive L1 L2 L3.
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