The Advanced Drive Technology T50015i1PPR (part #300503‑103) is a variable‑frequency inverter used in Precor and Cybex treadmills to control the motor speed and torque. Common failure modes for this unit include overheating of the IFT module, failure of the internal electrolytic capacitors or MOSFETs, insulation breakdown in the motor windings, and firmware corruption that can trigger fault codes such as “E‑01” (over‑temperature) or “E‑02” (motor stall). First‑check diagnostics should verify that the supply voltage is within spec, inspect the IFT board for burnt components or swollen capacitors, and review the drive’s diagnostic logs for error codes; if those checks are normal, perform a motor winding resistance test and confirm proper cooling airflow.[oss-gpt-20b]