I don't know what "C.P" might stand for in a HVAC control cabinet drawing. Could anyone have a quick look? I'm not an electrical engineer, but a translator. Not sure what electrical component is designated this way. All I know is that the system is manufactured by a Korean company named Kiturami Bumyang Air Conditioning Co., Ltd. Please, see the picture attached, item No.2. Sorry for poor quality, that's how it is in the manual.