4439093 Excavator Air Conditioning Control Panel for ZX450

Part number 4439093 is a genuine air conditioning control panel produced by Hitachi Construction Machinery Japan. This component is a fully automatic control unit designed specifically for the cabin air conditioning system of Hitachi ZX450 series medium-sized hydraulic excavators. Its universal models usually cover 3 series same platform models with similar tonnage and cab assembly, such as ZX450-3, ZX470-3, ZX400, etc. As the original human-machine interaction core, its interface definition, communication protocol, and air conditioning ECU (computer board) and sensors are fully matched

This product is a fully automatic air conditioning control panel manufactured by Denso. The panel is black and integrates physical buttons and a central display screen. The buttons include the "OFF" switch, "AUTO" automatic mode, "A/C" compressor switch, "TEMP" temperature adjustment, "MODE" air outlet mode selection, and air volume adjustment keys. The working voltage is DC 24V, and commands are received through CAN bus or analog signals to control actuators such as compressors, air door motors, and blowers, achieving one key automatic temperature control and improving driving comfort.

Installation and connection: When replacing, turn off the power, remove the old panel from the driver's console, and unplug the wiring harness plug. When installing the new panel (4439093), ensure that the wiring harness is securely plugged in and the locking mechanism is in place. Basic operation: Press the "AUTO" button, and the system will automatically run according to the set temperature; Adjust the temperature in steps of 0.5 ℃ or 1 ℃ using the "TEMP" key (usually within the range of 18-32 ℃); The "MODE" button is used to switch between facial, foot, defrost, and other ventilation modes.