The Allen‑Bradley 20DD040A3EYNARANE is a PowerFlex 700S adjustable‑frequency AC drive rated at 480 V three‑phase, 40 A with IGBT braking and an LCD display. Common failure points for this class include power‑stage overcurrent protection trips, phase loss or voltage imbalance triggering fault codes, and thermal overload of the IGBTs due to poor ventilation or high ambient temperatures. First‑check diagnostics: verify that the input supply matches 480 V ±5 % and all three phases are present; inspect the drive’s enclosure for dust accumulation or overheating and confirm proper airflow; review the drive’s internal fault log via the LCD or connected HMI for error codes such as “Phase Loss,” “Overcurrent,” or “Thermal” before proceeding to component‑level inspection.[oss-gpt-20b]