AIMS PCB‑16361‑00 is a 3 kW low‑frequency pure‑sine inverter/charger that combines DC‑to‑AC conversion with a built‑in battery charger and automatic transfer switch. Common failure modes include overheating of the MOSFET array, electrolyte leakage or failure in electrolytic capacitors on the input/output stages, transformer winding insulation breakdown, and control board IC damage due to overvoltage or thermal cycling. Begin troubleshooting by verifying that the 12 VDC supply is within spec and that the battery charger output voltage matches the datasheet; then visually inspect for burnt components, cracked PCBs, or swollen capacitors; finally check the inverter’s fault codes (if available) and measure the DC‑to‑AC switching frequency to confirm proper operation.[oss-gpt-20b]