... source heat pumps and have big advantage such as low-noise, high efficiency. These compressors are suitable for ... , overtension/lowtension, anti-restart, low oil level, limited oil pressure, over condensing pressure, low evaporating pressure, high temperature of ... , long lifetimeOnline service-SCADA (optoinal)Easy control, low maintenanceFasion shape, small size, low noiseRemote controlPictures