Haier AU282AHBEA Service Manual page 266

Ports on PCB functions for AU092/122AABHA
P
N
U
V
W
CN105: to CN501 on power module
CN106: to CN502 on power module
CN109: to the capacitor port
CN108: control port of 4-way valve
CN112: control port of fan motor
P301: earthing lug
CT: current detector
P302: bus port lead line of rectifier
P303: lead port of live line
P304: current lead port of rectifier
P305: PTC power supply lead port
P1: communication port between indoor and outdoor
CN110:
CN101:
CN102: signal input port of compressor sensor
CN103: signal input port of ambient temp. sensor and coil temp. sensor
CN1, CN4:
CN5: low pressure switch
CN6: high pressure switch
RL1, RL2, RL3: fan speed control relay
RL4:
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