P3 240 V AC Loss

What does 11319 mean?

240V AC input power was lost on port 3 while the drive was in an active state (e.g., MCS opening, closing, or closed). This causes the drive to cease operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check any upstream circuit breakers, fuses, or contactors related to the 240V AC supply for tripping or failure.

2. 4

   Ensure the molded case switch (MCS) and its associated control circuitry are operating correctly and maintaining a closed state when active.

3. 5

   Monitor the AC line voltage at the drive input terminals using a multimeter to confirm its presence and stability.