The Vanner 20‑2200TPF is a 24‑VDC to 120‑VAC pure sine‑wave inverter used in mobile or industrial applications. Common failure modes for this model include blown main fuses, damaged rectifier diodes on the input board, and overheating of the output MOSFETs due to poor ventilation; these often manifest as no power output or a “no voltage” condition at the AC terminals. First‑check diagnostics: verify that the 24‑VDC supply is present and within spec, inspect the main fuse and any inline protection devices for continuity, and visually examine the PCB for burn marks, cracked solder joints, or swollen electrolytic capacitors. If those checks pass, review the inverter’s diagnostic LEDs or error codes (if available) to pinpoint a specific fault.[oss-gpt-20b]