The Seidel DIGIFAS 7204 is a digital AC servo amplifier rated at 2.5 kVA, 3‑phase 400 VAC, and commonly used in high‑precision motion control applications such as CNC machines or packaging lines. Common failure modes for this class of drives include overcurrent protection trips due to phase imbalance or shorted windings, overheating from inadequate ventilation or capacitor degradation, and communication errors on the CAN/PROFIBUS interface caused by faulty wiring or firmware glitches. First‑check diagnostics: verify that the 400 VAC supply is within ±5 % and that all three phases are balanced; inspect the drive’s temperature sensor and cooling fan for proper operation; review the drive’s error log via its diagnostic port for codes related to overcurrent, overtemperature, or communication faults.[oss-gpt-20b]