The AFI Systems LLC DCS 911007‑1 is an electronic liquid filler controller used in automated dispensing lines, typically integrating servo drives, pressure sensors and a PLC interface. Common failure points for this class of units include power supply board degradation (especially the DC-DC converters), overheating of the main control ICs, and corrosion or failure of the high‑current motor driver outputs that actuate the fill valves. First‑check diagnostics should verify the input voltage rail stability and continuity to the controller chassis; inspect the heat sink and fan for dust buildup or mechanical damage; and review any stored error codes on the display or log file for indications of over‑temperature, undervoltage or motor stall conditions.[oss-gpt-20b]