Haier AU55NFIAIA Service Manual page 41

2. Do not connect the power line with different dimensions to the same grounding wire end.
Improper contact will affect protection.
3. Keep a proper distance between the communication wire and the power line. Otherwise,
abnormal communication will occur because of disturbance.
4. Do not connect the power line to the connecting end of communication wire. Incorrect
connection will cause damage of connected unit.
5.The communication wire must be shielding
Wiring example diagram:
1.The power supply and communication wiring of indoor electronic
expansion valve must be connected with their corresponding indoor
unit.And their phase sequence must correspond with the remarks
Outdoor unit
strictly respectively, or will cause control board of indoor unit and
electronic expansion valve box abnormal or damaged.
2.Because the power supply of MP3 control board is obtained from
"indoor 1","indoor 1" must be always electrified in running mode, or
will cause performance abnormal.
3.Parameter of connection wiring
L1 L2 L3 N C1 C2
Circuit breaker
Power source
3PH. 380VAC, 50Hz
Commercial Air Conditioner
Indoor-Outdoor Wiring Diagram
NOTE
:
:
communication wiring: 2*(0.5-1.5)mm shielded wiring
MP3 wiring and indoor wiring 4*(0.5-1.5)mm ,3*(0.5-1.5)mm .
:
Indoor unit 1
C1 C2 L N C
Indoor power supply
1PH.220V~.50Hz
wire.
2
3*(1-1.5)mm
.
2
.
2
2
Indoor unit 2
C1 L
C2
Indoor power supply
1PH.220V~.50Hz
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Model: AU55NFIAIA
EEV Driving PCB MP3
Y/GR
B W BR B W BR B W BR
L1 N1 C1 L2 N2 C2 L3 N3 C3
Indoor unit 3
N C C1
C2
L N C
Indoor power supply
1PH.220V~.50Hz