Commercial Air Conditioner Model: HBU-18CF03
HDU-42CF03/H HPU-42HF03
84
Port and definition:
CN1：control port of live wire of swing motor
CN3：signal input port of ambient temp. sensor ,coil temp. sensor
CN4：control port of 4-way valve（not available for cooling only type）
CN5：primary side of transformer
CN6：second side of transformer
CN7：control port for outdoor fan motor（not available for cooling only type）
CN11：control port of live wire of electric heating
CN12：connect the input of LED
CN13：connect port of netural wire of electric heating
CN16：connect port of remote control detector
CN18：live wire input port of PCB
CN19：netural wire input port of PCB
CN20：outdoor compressor control terminal（also can control outdoor fan motor for
cooling only type）
CN22：high speed control port of indoor fan motor
CN23：middle speed control port of indoor fan motor
HPU-42HF03
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