Technical FAQs

Ask a Question

What can cause a PHF (phase fault) on the ATS22 Soft Start?

Issue:
Display shows PHF

Product Line:
ATS22, Altistart 22

Environment:
All models and serial numbers

Cause:
Loss of a line phase

Resolution:
1.  Check the line voltage, the connection to the soft starter and any isolating devices located between the line and the soft starter (contactors, fuses, circuit breakers, etc.).
2.  Check the motor connection and any isolating devices located between the soft starter and the motor (contactors, circuit breakers, etc.).
3.  Check the motor state.
 

Was this helpful?
What can we do to improve the information ?