Description of Air Conditioner LAN Control System INFOID:0000000001721290 The LAN (Local Area Network) system consists of unified meter and A/C amp., mode door motor, air mix door motor and intake door motor. A configuration of these components is shown in the figure below.System Construction INFOID:0000000001721291 A small network is constructed between the unified meter and A/C amp., air mix door motor, mode door motor and intake door motor. The unified meter and A/C amp. and motors are connected by data transmission lines and motor power supply lines. The LAN communication is achieved using the dedicated communication line and ground line between each door motor and the unified meter and A/C amp. The unified meter and A/C amp. identifies each motor type by its unique Address. Serial communication includes positioning and error checking information. The following functions are contained in LCU’s built into the air mix motor, mode door motor, and intake door motor. • Address • Motor opening angle signals • Data transmission • Motor stop and drive decision • Opening angle sensor [Position balanced resistor (PBR) function] • Comparison • Decision (Unified meter and A/C amp. indicated value and motor opening angle comparison)…

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