Nikki Denso Actus NPSA-103MU Servo Drive

The NPSA‑103MU is a 3‑axis AC servo drive from Nikki Denso Actus Power, designed for high‑speed motion control in industrial automation. Common failure modes include overheating of the power MOSFET array, insulation breakdown on the phase windings, and failure of the internal microcontroller due to voltage spikes or firmware corruption. First‑check steps: verify that the 200–220 V AC input is within spec and that the drive’s output current limits are set correctly; inspect all wiring connections for loose contacts or corrosion; and review any fault codes displayed on the drive’s panel or via its diagnostic interface before proceeding to component testing.[oss-gpt-20b]

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