Input Phase Loss Fault

What does EPH1 mean?

This fault occurs when one or more input phases to the Altivar 212 drive are lost, indicating an issue with the incoming AC supply or its connection to the drive.

• Loss of one or more input phases.
• Incorrect setting of parameter F608 ([Input phase loss]).

Click steps to track your progress.

1. 1

   Measure the incoming AC line voltage at the drive input terminals (R/L1, S/L2, T/L3) to confirm phase presence.

2. 2

   Check upstream circuit breakers or contactors for proper operation and continuity.

3. 3

   Verify the setting of parameter F608 ([Input phase loss]) to ensure it is appropriate for the application.