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Search FAQs

My ATV212 faulted and stopped with EPH1. What is that fault?

Issue:
EPH1 fault on ATV212

Product Line:
ATV212, ATV21

Environment:
All models and serial numbers

Cause:
External or internal

Resolution:
EPH1 is an input phase loss.

  • Verify the wiring connections on all three phases coming into the drive (R/L1-S/L2-T/L3).
  • Measure line to line voltages to make sure they are all present and equal phase to phase.
  • To clear the fault, cycle power.  Turn off the line voltage until the display goes off.  Then turn the voltage back on.
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