| CPC F24F 11/46 (2018.01) [F24F 11/52 (2018.01); F24F 11/56 (2018.01); H04Q 9/00 (2013.01); G05B 2219/2614 (2013.01)] | 16 Claims |

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1. A wired remote controller for controlling an indoor unit, the wired remote controller comprising:
a display panel;
a wired interface that is connected to the indoor unit by wire;
a memory in which information on a power capacity for each indoor unit model is stored; and
a processor that receives power from the indoor unit through the wired interface and communicates with the indoor unit through the wired interface,
wherein the processor is configured to:
receive information on power consumption of the indoor unit through the wired interface,
identify a power capacity corresponding to the indoor unit based on the information on the power capacity stored in the memory, and
increase or decrease brightness of the display panel based on a relationship of a difference between the identified power capacity and the received information on power consumption of the indoor unit to a critical range.
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