CNI H0102D140A4 is a 4000 RPM brushless servo motor that integrates its own motion‑control electronics and supports Fieldbus, E‑NetX, and CAN‑BUS interfaces (IP54 enclosure). Common failure modes for this model include power‑stage overheating or insulation breakdown, loss of encoder feedback leading to position errors, field‑bus communication faults (CRC errors or lost packets), and capacitor degradation in the drive board. First‑check diagnostics should verify 24 V DC supply integrity, inspect motor windings for shorts or opens, review any logged error codes on the integrated controller, and perform a visual inspection of connectors and PCB for burn marks or swollen components.[oss-gpt-20b]