SL1600-ST Package Unit Controller

Suitable for 1~2 compressors of air-cooled/water-cooled packaged unit/duct unit



*Built-in phase sequence/phase lost protection;

*Two steps anti-freeze and intelligent defrost;

*Trial run and off memory function;

*Condenser fan is directly controlled without additional pressure control switch;

*Support auto restart function and terminal chain control;

* With timer ON/OFF, service remind and lock function

*Liquid circuit valve control, enhance the safety for compressor operation;

*Compressor delay function and auto balance spoilage;

*Compressor generator protection, high/low pressure protection;

*Built-in compressor current detection, no need overload protector;

*High/low temperature protection for chilled water-out/in;

*High/low temperature protection for cooling water-out/in, and probe lost protection;

*Strong stability,0.15-80MHz interference rejection, 4KV high voltage and surge resistance;

*SMT technology, 48 hrs burn-in test for ensuring quality;

*MODBUS-RTU RS485 Widely-used communication protocol, up to 1km max distance (Gateway Free);

* Adopt differential communication mode with checksum between control board and control pane, keep constant, stable synchronous communication;

*PCB Surface painted with CRC, avoid leakage, short circuit, and erosion from acid/ alkali/ alcohol/ humidity/salt spray;

*Featured with tension and torsion resistance probe, long working life;

*Wide voltage range, avoid misoperation caused by voltage fluctuation;

* Control logic implemented on the control board.