Power Loss

What does F003 mean?

Single-phase operation has been detected, combined with an excessive load on the motor. This condition typically arises from a lost phase on the incoming AC line or a severe voltage sag, causing the drive to struggle under load. It can lead to motor and drive overheating if unresolved.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Reduce the mechanical load on the motor to ease the strain on the drive, especially during suspected single-phase operation.

2. 4

   Inspect power wiring connections from the main supply to the drive for looseness or damage.