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What would cause the ATV18 drive not to run when a run forward command is being given to the drive?

FA275727

27 July 2022

Issue:
ATV18 does not run, when a run forward command is being given.

Product Line:
Altivar 18

Environment:
All

Cause:
ATV18 drive is not running.

Resolution:
Check the drive status.  If the drives state is NST (no run permissive).  Verify if an input is assigned to run permissive, and satisfy the input if applicable.  Next check LI1 to make sure its getting +24vdc, if yes cycle the input off and verify drive state changes to RDY.  

If the drives status is RDY,  activate LI1 to see if the drive is getting +24vdc (2 wire control only).