The TM5‑015i‑1P is a 3‑phase, 6 A IFT AC drive (part 48691‑109) used as the motor controller in treadmill applications. Common failure points for this class of drives include over‑temperature shutdowns from cooling fan or heat sink failure, insulation breakdown on the power MOSFETs, and loss of communication with the treadmill’s PLC due to bad I/O wiring or firmware corruption. First‑check diagnostics: verify that the drive’s input voltage is within spec and that the 3‑phase supply is balanced; inspect all connectors for corrosion or loose contacts and confirm that the cooling fan is operating; review the drive’s status LEDs or error code display for any fault indications before proceeding to internal component testing.[oss-gpt-20b]