The KEB 07.F0.200‑1278 is a Combivert F0 control cabinet that functions as a frequency converter/drive for single‑phase AC motors, rated at 1.8 kVA with a 200 A filter and 400 V class input. Common failure points in this series include overheating of the internal power module (often due to dust or inadequate forced‑air cooling), failure of the high‑current filter contacts, and degradation of the DC bus capacitors under prolonged operation. First‑check diagnostics: verify that the cabinet’s external power supply is delivering the correct voltage and current, inspect for visible signs of overheating or burnt components on the main board, and review any diagnostic LEDs or error codes displayed on the front panel to pinpoint a specific fault.[oss-gpt-20b]