GarVac ELVT is a generator shunt‑field DC regulator designed for 208/230 V, 5 A single‑phase generators. Common failures in this class include burnt or degraded field coils, worn contactors or relays, and faulty control circuitry such as the voltage sensing resistor network or SCR driver. Inspect the field coil for discoloration or excessive resistance, verify relay contacts for pitting or corrosion, and check the regulator’s output voltage against the generator’s rated shunt field current. First‑check steps: confirm mains supply to the regulator, measure input and output voltages with a multimeter, and inspect all wiring for loose connections or signs of overheating.[oss-gpt-20b]