SMW ACCU‑Smart 55 is a servo control panel used for indexing and motion control in industrial automation. Common failure points include power supply board degradation, I/O module misalignment, and encoder/position sensor drift due to mechanical wear or cable insulation breakdown. For this model, overheating of the drive ICs can cause intermittent lockouts, while capacitor leakage on the main board often leads to startup failures. First‑check diagnostics: verify 24 VDC input voltage and ripple; inspect all I/O connectors for corrosion or loose pins; review any displayed error codes (e.g., “E01” for encoder fault) and cross‑reference with the service manual’s troubleshooting flowchart.[oss-gpt-20b]