The TM5‑015i‑1N is a high‑performance treadmill drive controller that converts a 100–115 V single‑phase supply into a 3‑phase output (6 A/9 A) for the motor on Precor 932I/946I models. Common failure modes in this class include capacitor degradation, phase loss or overcurrent protection tripping, and overheating of the power MOSFET array due to poor ventilation or dust buildup. First‑check diagnostics: verify input voltage stability and proper grounding; inspect the output capacitors for bulging or leakage and test the 3‑phase windings for continuity and resistance balance; review any error codes on the drive’s diagnostic LED or serial interface for indications of phase loss, overtemperature, or short‑circuit protection.[oss-gpt-20b]