Intelligent Controller, Frequency Conversion Controller, Switch Power Supply manufacturer / supplier in China, offering DC Inverter Heat Pump Control PCBA for 4.7kw 4 Compressor Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online, DC Inverter Heat Pump Control PCBA for 4.7kw 4-Pipe Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online, DC Inverter Heat Pump Control PCBA for 4.7kw Four-Pipe Low Temperature Water Heater and Cooler with Auxiliary Circuit Eev, Modbus Online and so on.