Phase WU Short

What does 43 mean?

Excessive current has been detected between output terminals W and U, indicating a direct short circuit condition between motor phases W and U. This fault causes extremely high currents and will severely damage the drive's output transistors and the motor windings if not immediately resolved. Prompt investigation of wiring and motor integrity is crucial.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Measure the resistance between motor phases (U-V, V-W, W-U) to check for short circuits in the motor or cable; all readings should be balanced.