Fourtech Temperature Controller Manual (360p 2026)

| Error Code | Meaning | Solution | | :--- | :--- | :--- | | or LLL | Sensor input broken (open circuit) or out of range | Check thermocouple wiring for breaks. Replace sensor. | | EEE | EEPROM memory error | Internal failure. Cycle power. If persists, replace controller. | | S.ERR | Input signal error | Sensor type mismatch (e.g., Pt100 plugged into thermocouple setting). Check sensor type. | | AL-1 (flashing) | High alarm condition | Process temperature exceeded AL-1 setting. Inspect load or cooling system. |

A: Three likely causes: (1) Wrong sensor type selected in INP , (2) Damaged thermocouple, (3) Controller needs calibration. Check your manual’s sensor troubleshooting section. fourtech temperature controller manual

A: Look for a parameter called F-RST or INIT in the advanced menu (usually under FUNC or SEC ). Set it to 1 . Warning: This erases all PID and alarm settings. | Error Code | Meaning | Solution |