The Alcatel Adixen ACT 200 (TH/T) is a single‑phase turbo‑pump controller designed for ATH and MOP series pumps, featuring automatic 100–240 V detection, menu operation, and serial RS‑232/485 communication for speed, current, temperature, and run‑time monitoring. Common failure modes include power supply mis‑detection or voltage spikes causing the unit to lock out, overheating of the internal regulator leading to shutdowns, and degradation of the RS‑232/485 transceiver or cable connections that result in loss of pump status updates. First‑check diagnostics: verify input voltage stability with a multimeter, inspect the power supply module for burn marks or loose terminals, test the serial ports with loopback or a known good PC interface, and examine the controller’s temperature sensor and cooling fan for proper operation.[oss-gpt-20b]