P (Proportional) : 0–999 I (Integral) : 0–3600 s D (Derivative) : 0–900 s HY (Hysteresis) : 0–999 AL1 (Alarm setpoint) InP (Input type) : K, J, PT, 4-20
FourTech controllers are warranted against manufacturing defects for 12 months from date of purchase. For technical support, contact your local distributor with the model number and error code. fourtech temperature controller manual
| Error Code | Meaning | Fix (From the Manual Logic) | | :--- | :--- | :--- | | | Sensor open or reversed polarity | Check thermocouple wires. Yellow (+) to terminal 3, Red (-) to terminal 4. | | LLL | Sensor shorted or temp below range | Replace thermocouple. Check for melted probe. | | Err | Internal parameter corruption | Reset to factory defaults (See Level 2 menu: FACt or RST ). | | 0000 | No sensor detected | Is the sensor plugged in? Is INP set to 0 (no sensor) by accident? | P (Proportional) : 0–999 I (Integral) : 0–3600
These terminals power the controller itself (not the heater). Yellow (+) to terminal 3, Red (-) to terminal 4
This is where you fix 99% of problems.
Go to Google and type exactly this string, replacing MODEL with your unit: filetype:pdf "FourTech" "MODEL" "manual"
If you are reading this, your controller is likely showing an error.