Input error handling. Solution: This indicates a broken thermocouple or loose wire. The manual will show you which terminals (usually 4 & 5) are for the sensor. Check continuity with a multimeter.
Upon powering the device, the display will light up. The upper screen displays the current ambient temperature (e.g., 25°C), and the lower screen displays the previously set target temperature. fourtech temperature controller manual free
: Choose between simple On/Off control or advanced PID control with auto-tuning for higher precision. Input error handling