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What causes LFF3 code on the ATV320 drive?

Issue:
What causes LFF3 code on the ATV320 drive?

Product Line:
Altivar 320, ATV320

Environment:
All

Cause:
N/A

Resolution:
This is a AI3 4-20 mA loss.  This indicates that the 4-20mA reference on Ai3 and COM is not seen as expected.
If this function is programmed in error you can disable it by going under CONF, FULL, and I/O.
Here you will have menus A1C-, A2C-, and A3C-.  These are alarm group 1 - 3 definition parameters.
One of them must be programmed as AP3 as AP3 is an alarm indicating the absence of 4-20mA signal on input AI3.
These can always be unassigned to disable this function.
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