Haier AU422XIBAA Service Manual page 79

terminal A B C of wired controller respectively.
The communication wiring is 4 meter long; if the actual length is more than it,
please distribute wiring according to below table:
Communication wiring length m
<100
100 and <200
200 and <300
300 and <400
400 and <600
One side of the shielded sheet of communication wire must be earthed.
Dimensions of wiring
2
0.3mm X3-core shielded wire
2
0.5mm X3-core shielded wire
2
0.75mm X3-core shielded wire
2
1.25mm X3-core shielded wire
2
2mm X3-core shielded wire