Haier AU55NFIAIA Service Manual page 80

electronic
expansion valve
gas pipe temp. sensor
CN5
liquid pipe temp. sensor
CN11
ambient temp.
float switch
sensor
indoor temp
CN 24
1 2
sensor
CN2
LED3 LED2 LED1
SW1
CN13
CN1
receive display PCB
choice of remote
controller type
CN14
choice of wired
R
controller type
A B C D
wired controller
outdoor
communication
B:Black
BL:Blue
BR:Brown
R:Red
W:White
Y/G:Yellow/Green
AE072FCAKA，AE092FCAKA，AE122FCAKA，AE142FCAKA，AE182FCAKA，AE212FCAKA，AE242FCAKA
Commercial Air Conditioner
Indoor unit wiring diagram
M
for built-in EEV type
1
2 3 4 5 6
CN6
water temperate
CN9
sensor
2 1
serial
unit code setting
CN16
Indoor control board
CN15
2 1
CN1 CN10 CN4 CN7
1 7 6 5 1 1 1
2 4 3 2 3 2 3 2
R
fan
M
capacitor connector
M
earthing
pump motor
Y/G
indoor fan motor
negative ion generator or
high voltage accumulator
electronic
expansion valve
box power supply
and communication
indoor power
Must connect electronic expansion valve box
NOTE
：
power and communication from corresponding
1PH.220-230V~.50Hz
indoor,wiring sequence must correspond with
the label respectively,other wise, will cause
PCB of indoor and electronic expansion valve
box not work and damaged.
BL BL
1 2
3
CN8
CN17
transformer
CN23
CN25
BR
CN18
W
FUSE
CN22
T3.15A/250VAC
CN12 CN19 CN20 CN3
1
3 2 1 2
B R R
M
swing motor
resumable heat
protector
80 ℃， 10A/250VAC
auxiliary heater
FUSE
T15A/250VAC
one-off heat protector
105℃ 10A/250VAC
，
only applicable for unit with
auxiliary electric heater
- 79 -
Model: AU55NFIAIA
0010573324
NOTE:The dashed "－－－ "in indoor controll board is
PCB inner wiring.
About control board outer connector:
In the diagram,gas pipe temp. sensor,liquid pipe
temp. sensor,indoor fan motor,transformer are
necessary parts； Wired controller,receive
display,electronic expansion valve,float
switch,pump motor,swing motor are parts matched
with the model(combined usage ）； Auxiliary
electric heater,negative ion generator,high voltage
accumulator are optional parts for health and
comfort（ combination usage arbitrarily).Wired
controller and receive display only can choose one
at will.
The unit with remote controller is matched with
receive display:
1.Ceiling concealed type:CN11 must be short
connected with a jump wire ；
2.Duct type ： connected with float switch and
pump motor
；
3.Cassette type:connected with float switch 、
pump motor and swing motor ；
4.Cabinet type:CN11 must be short connected
with a jump wire， connected with swing motor
The unit with wired controller(equipped with wired
controller ， can make remote operation on wired
controller with remote controller such as YR-H39)
Short connect CN15 CN17 together with jump
、
wire ， other parts are the same as remote control unit
Setting method with electronic expansion valve outside:
CN23 is disconnected,CN25 is connected with electronic
expansion valve communication,and the electronic
expansion valve box(MP3 or MP2) control indoor
refrigerant flow.
Setting method with built-in electronic expansion valve:
：
CN23 is short connected with a jump wire, CN6 is
connected with electronic expansion valve ， and
indoor unit control refrigerant flow itself.
Attentions: The water temp sensor (CN9) and indoor
temp sensor (CN24) are unuseful now. The fourth bit
of 4 position dial switch is used to choose the
different speed of indoor fan under heating mode.
"ON" means that the speed of indoor can be choosed
from middle and low."OFF" means that the speed of
indoor fan can be choosed from high,middle and low.
SW1 emergency switch(ON/OFF)
short connector for built-in
RL7 indoor fan motor low-speed relay
CN 23
electronic expansion valve
CN15 short connector for wired
RL6 indoor fan motor Mid-speed relay
CN17
controller
serial communication port RL5 indoor fan motor High-speed relay
CN16
connector for float switch
RL4 health function module relay
CN11
LED3 indicator （ running － red ） RL3 pump motor relay
indicator timer yellow
LED2 （ － ） RL2 swing motor relay
indicator power green
LED1 （ － ） RL1
auxiliary eletric heater relay
；
：