JRB A45645-4 Coupler Control

JRB A45645‑4 Coupler Control is an industrial controller board that interfaces with hydraulic couplers and associated valves. Known failure modes include loss of power or brown‑out conditions due to bad input voltage, shorted or corroded I/O terminals, and internal fuse blowouts; it can also lock out if the valve wiring is disconnected or a pressure sensor fails. First‑check diagnostics: verify 24 VDC (or specified) supply continuity, inspect all connector pins for corrosion or loose contacts, and review any stored error codes on the panel display before proceeding to component testing.[oss-gpt-20b]

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