Re-calibrate the 'VOLT' setting or check sensing lines. AVR NTA-5A-2T for Denyo Generator
: Correct output voltage is highly dependent on engine speed. If RPMs are too low, it can lead to under-voltage; always verify that the generator engine is running at its rated speed (e.g., 3600 RPM for some smaller units). Replacement
: The AVR works by sensing the "Open-Delta" connections to automatically adjust current to the exciter field. RPM Influence