The compressor delay time (PT) may be active, or the temperature is within the return difference range.
The sandwich arrived. Sarah set a plate down on a workbench. "How’s it looking?"
Sensor open-circuit or short-circuit error. The controller will sound an integrated buzzer and activate the emergency cycle (compressor runs for 15 minutes, then stops for 15 minutes alternatively). Check the wire integrity at terminals 3 and 4.
The current temperature has fallen below the lower limit calculation ( F1 - F7 ). Stc-600 Temperature Controller Manual Pdf
The temperature has exceeded the upper measuring limit of +99°C.
⚠️ Do not exceed relay current rating. For inductive loads (motor, compressor), use an external contactor.
Press and release the Power key, or wait 30 seconds without pressing any buttons. The system will automatically save your changes and return to the normal temperature display. Parameter Function Table Setting Range Default Value F0 Temperature Set Value (Target Temp) -40°C to +70°C F1 Hysteresis / Temperature Differential 1°C to 15°C F2 Compressor Delay Protection Time 0 to 9 Minutes F3 Lower Limit of Temperature Setting -40°C to F0 F4 Upper Limit of Temperature Setting F0 to +70°C F5 Temperature Calibration / Offset -10°C to +10°C F6 Control Mode (Cooling / Heating) 0: Cooling / 1: Heating 🔍 Understanding Advanced Functions 1. Hysteresis (F1) Explained The compressor delay time (PT) may be active,
Minimum downtime for the compressor to prevent short-cycling. Maximum Defrost Cycle Duration 0 to 99 minutes 20 minutes The maximum running time for a single defrost cycle. F5 Defrost Interval Cycle 0 to 99 hours Time interval between consecutive defrost cycles. F6 Max Alarm Upper Limit 0°C to 50°C Degrees above F1 that trigger an over-temperature alarm. F7 Min Alarm Lower Limit 0°C to 50°C Degrees below F1 that trigger an under-temperature alarm. F8 Temperature Calibration -5°C to +5°C
Protects the compressor from rapid cycling, ensuring a minimum delay between stops and starts. STC-600 Wiring Diagram and Installation
If the controller shows error codes, consult the following common issues: "How’s it looking
. Check your wiring at the back of the unit or replace the probe. Installation Tips
If your target temperature ( F1 ) is set to 4°C and your hysteresis ( F2 ) is set to 2°C: