Drive: Short-circuit detected

What does F07807 mean?

A phase-to-phase short-circuit has been detected at the motor-side output terminals of the converter. This is a critical fault that can severely damage the power unit if not resolved. It can also be triggered if the line (input) and motor (output) cables are accidentally interchanged, creating a short circuit condition.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Use a multimeter to measure the resistance between motor phases to confirm no short circuit exists within the motor windings or cables.