Fourtech Temperature Controller Manual Jun 2026

If using a Solid State Relay (SSR), ensure you are using the DC voltage output pins. For heaters using a mechanical relay, use the "Relay" contact pins. 6. Troubleshooting Common Issues

Tip: For high-current loads, always use an interposing relay or contactor to protect the controller's internal circuitry.

Install a fuse and circuit breaker between the power source and the controller. 3. Quick Operation Guide Setting the Target Temperature (SV): Press the Set key briefly. fourtech temperature controller manual

Exit the menu. The light on the front panel will begin to blink.

Adjusts how aggressively the controller approaches the set point. I (Integral Time): Corrects for long-term offsets. If using a Solid State Relay (SSR), ensure

When a system fault occurs, the Fourtech controller replaces the Process Value (PV) display with an explicit error code. oPEn or HHHH (Sensor Open Circuit)

Check for input voltage instability. 6. Safety Warnings Quick Operation Guide Setting the Target Temperature (SV):

(Alarm): Set absolute high or low alarm values to prevent over-temperature. PID temp control Instructions SOLVED

The user interface consists of dual LED display screens and tactile navigation keys. Display Indicators

Adjust your Set Value (SV) to your standard operating target temperature.

For optimal performance, the Fourtech controller should learn the thermal characteristics of your specific setup. Set your desired temperature (SV). Enter the parameter menu (hold ). Locate the Atu parameter and change it to 1 (ON) . Exit the menu. The display will flash "AT" or "Atu".