FADEC is one of those functions which is commonly misunderstood. In spite of what some manufacturer advertising brochures seem to say, many supposedly FADEC-equipped helicopters are not, which leads to this misunderstanding.
Real FADEC means that there is no secondary (back-up) engine control such as throttle levers (ECLs) or twist grips. All engine control is automatic, including failure modes.
Basically, if it has a single-channel EECU (or equivalent) it must have back-up controls since the engine fuel flow can only be controlled by the pilot in the event of a automatic control malfunction.