the SL1500-PU cabinet controller can control up to 4 compressor systems such as air-cooled heat pump, water-cooled heat pump, air-cooled cold-hot, water-cooled hot-cold, air-cooled single-cooled, water-cooled single-cooled and other models. Summarizing the company's many years of cabinet machine control experience, it has a better performance in anti-interference. All ports of the complete controller have passed more stringent EMC tests: electric fast pulse 4kV, surge 4kV, conduction immunity 150K~ 80M, with SL108 handheld programmer, the man-machine interface is more user-friendly.