Check the sensing wires (A-B-C-D) for continuity. A single loose wire here will cause the AVR to misread the load and output incorrect voltage. manual - denyo.info
Connect sensing terminals (often 1 & 2) to the main output terminals or the auxiliary windings. an-5-203 avr wiring diagram pdf
(also known as the ) is a half-wave phase-controlled thyristor-type Automatic Voltage Regulator (AVR) primarily used in Check the sensing wires (A-B-C-D) for continuity