Haier AU55NFIAIA Service Manual page 72

Ports
R, S, T Power supply ports
U, V, W Compressor ports
E Grounded port
N Neutral wire port
L1, L2
CN102 Current transducer port
CN211,
Fan motor port
CN212
CN205 Water pump port
CN206 Electric heater port
CN207 Solenoid valve port
CN208 Solenoid valve port
CN209 Four-way valve port
CN210 Oxygen generator port
CN302 Testing board port
CN303 Testing software port
CN304 Communication port
CN307, Fan motor port for dispersing
CN308 heat
CN310 EEV port
CN311 Radiator temp. sensor port
Mid-condenser temp. sensor
CN312
port
CN313 Defrosting temp. sensor port
CN314 Ambient temp. sensor port
CN315 Suction temp. sensor port
Discharging
CN316
port
CN317 Low pressure switch port
CN318 High pressure switch port
Commercial Air Conditioner
Ports name
temp. sensor
- 71 -
Wiring method
To power of 3 PH, 380V, 50Hz
To motor (pay attention to phase sequence)
Grounding (less than 10Ω;more thanφ1.6mm)
It is connected to neutral wire
Shorted now
To current transducer
To fan motor
To water pump (be spare)
To electrical heater
To solenoid valve
To solenoid valve
To four-way valve
To oxygen generator (optional)
To testing board. Used to modify, check data for
after sale personnel.
To testing computer. Used to modify, check data
for after sale personnel.
To C1, C2 of communication block
To fan motor for dispersing heat (be spare)
To outdoor electronic expansion valve
To radiator temp. sensor (blank temporarily)
To mid-condenser temp. sensor
To defrosting temp. sensor
To ambient temp. sensor
To compressor suction temp. sensor
To discharging temp. sensor
To low pressure switch port
To high pressure switch
Model: AU55NFIAIA