Intelligent Controller, Frequency Conversion Controller, Switch Power Supply manufacturer / supplier in China, offering DC Inverter Heat Pump Control PCBA for 4.7kw Two Compressor Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online, DC Inverter Heat Pump Control PCBA for 4.7kw Double Compressor Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online, DC Inverter Heat Pump Control PCBA for 4.7kw Double System Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online and so on.