The Linde H2X 694 S 00788 is an industrial electronic control unit used in material‑handling and gas‑processing equipment; it typically houses a microcontroller, power regulation circuitry, and multiple I/O ports for motor drives and safety interlocks. Common failure modes for this class of controller include over‑temperature shutdowns due to fan or heat‑sink failure, capacitor degradation causing brown‑out or erratic logic, and shorted protection diodes leading to instant reset or “no signal” conditions. First‑check diagnostics should verify the 24 V/48 V supply rails with a multimeter, inspect for visible burn marks or swollen electrolytic capacitors on the board, and review any stored error codes via the diagnostic port or console interface.[oss-gpt-20b]