Haier MRV 5-RC AB052MAERA, Service Manual

Page: 60 / 243

57
Description of the Main-board Port definition
No. Port Port description
1 L/N/G AC Power Input
2 SV3 Liquid Jetting to compressor 1
3 SV10 Drain the oil from compressor 2
4 SV9 Drain the oil from compressor 1
5 SV1 Balance pressure(Load-OFF)
6 4WV Hot and cold switching
7 HEAT1 Heating band of compressor 1
8 HEAT2 Heating band of compressor 2
9 HPS2 High pressure switch of compressor 2
10 HPS1 High pressure switch of compressor 1
11 Ps Low pressure sensor
12 Pd High pressure sensor
13 Td1 Exhaust temperature of compressor1
14 Td2 Exhaust temperature of compressor2
15 Tdef1 Detect the defrosting temp
16 Tao Ambient temperature
17 Toil2 Detect the oil temp. of compressor 2
18 Toil1 Detect the oil temp. of compressor 1
19 Toci1/Ts Detect SH temp. in heating
20 LEVA1 SH control in heating
21 LEVA2 SH control in heating
22 DC12V Output DC12V
23 BT Output DC5V/Communication
24 P/Q Indoor/outdoor unit com. port
25 A/B/C Outdoor unit com. port
26 Bus-B/A Centralized control port
27 Stop Emergency stop port
28 ZIGBEE Wireless module com. port
29 INV-COM INV module com. port
30 Low Power Low standby power consumption
31 BM1
Outdoor and indoor searching
Outdoor address setting
32 BM2 Wireless communication
33 BM3 HP setting of outdoor units
34 BM4 Set the control address
35 SW4/5/6/7 Special function control keys
36 DC12V
Input DC12V
37 L/N AC Power Input
38 SV32 Liquid jetting to compressor 2
39 4WV2 Hot and cold switching
40 4WV3 Hot and cold switching
41 Toci2 Detect SH temp. in heating
42 Tdef2 Detect the defrosting temp
43 Tx Rx Input DC5V/communication
44 Tliqsc/Tsco Detect SH temp. of subcooler
45 LEVB Contral subcooler
Note:
B:Black G:Green W:White BL:Blue R:Red Y:Yellow
The component in the dotted box is used for 16 to 22HP
6. Wiring diagram
L1＇
L1
L2＇
L2
L3＇ L3
N
U
V
W
CN10
CN1
CN2
CN3
CN7
CN8
CN9
1 2 3 1 2 3
CN21 15V
DCP
P N
CN4 CN5 CN6
INV Module 1
COMP1
W
V
U
Power:3N
～,
380
V,50/60Hz
L1
L2
L3
N
R
S
T
Reactor 1
1 2 3 1 2 3 1 2 3 1 2 3 4
SV10 CN8 W
1 2 3 4 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
1
2
1
2
6
5
4
3
2
1 6
5
4
3
2
1
CN20 LE
VA1
R
CN21 LE
VA2
R
4
3
2
1
4
3
2
1
2
1
2
1
Fuse T5.0A-250
VAC
1
2
3
4
CN18
1
1
2
2
3
CN46
P Q
CN17 A B C
2
1
3
2
1
3
Toci1
Ts
4
3
2
1
3
2
1
Main board
Q
P
A
B
C
1 2 3 4 1 2 3
CN19 W IN
V-COM
2
1
Toil1
Toil2 CN30
CN34
CN35
Td1
CN37
Td2
CN40
Tdef1
CN38
Tao
CN44
Indoor Unit
Outdoor Units
SW1
SW2
SW3
SMG1
SMG2
Digital tube display
STA
RT
DOWN
ST
OP
UP
Rotate the dial pad
BM1
ON
SW4 SW7
SW5
SW6
BM4
ON
BM3
ON
N
R
S
T
U
V
W
CN10
CN1
CN2
CN3
CN7
CN8
CN9
1 2 3 1 2 3
DCP
P N
CN4
CN5 CN6
INV Module 2
L1＇
L2＇
L3＇
Filter
Board 2
L1
L2
L3
COMP2
W
V
U
Reacto
r2
+
-
4
1
Capacitor
Board 2
+
-
4
1
M
M
1 2
1 2
15
V
15V
DC 540V
DC 540V
DC+
DC-
15V
1
4
1
4
1 4
1 4
1
1
2 3
3 2
COM
CN22 COM1
1
1
COM
Fan1
Fan2
White Terminal
White
Terminal Red
Terminal
Red
Terminal
5
COM
3 2
3 2
5
COM
GND
P
5
2
3
2
3
2 3
3 2
CN21 15V
W
（
R
）
Communication
line
ZIGBEE CN24 W
The right side of the dashed line indicates that the double fan model has this part; the single fan model does not have this part.
2 1 2 1 3 2 1 3 4 2 1 3
CN6
Tdef2
CN5 Tsci CN7
Toci2
CN8 Tsuc
6 5 4 3 2 1
CN20
LE
VA3
3
2
4
CN10 W
TX RX
1 1
CN1
N
CN2
L
1 2 3
CN18
R
SV32 CN13
Y
4WV2 CN14
BL
4WV3
2
1
3
12V
CN39
1 2 3 4
BT
CN25 W
1
2
1
3
CN9
W
12V
1 2
1
2
1
2
CN41 W Low Power
IO Board
2
1
3
Tsco
Tliqsc
4
CN28
Communication
line
DC+
DC-
15V
GND
DC+ DC- 15V GND
DC+ DC-
15V
GND
B
N
B
R
W
B
R
W
B
P
N
Capacitor
Board 1 P
N
Filter
Board 1
W
（
R
）
R B
W
（
R
）
R B
B
R
W
B
R
W
B
R
W
B
BL
SV9 CN9 R
SV1 CN10 R 4WV(1) CN
11 BL
Heat1 CN3 G
Heat1 CN3_1 G
Heat2 CN4 G
Heat2 CN4_1 G
SV3 CN6 W Fan1 CN5 B
PD R CN31
PS B
L CN27
HPS1
CN2 R
HPS2
CN1 R
W
（
R
）
B
N
P
CN13
CN13
6
5
4
3
2
1
CN22 LEVB
R
1 2 3 4 1 2 3 4
BM2
CN24 COM2
CN22 COM1 CN24 COM2
CN16
W
NL
1
3 2 4 5 6
7 8
11
12
20 21
27
28
29
9 10
24
25
26
35
34 33
31
17/18/19/44
13/14/15/16
22
23
30
36
37
38
39
40
41
42
45
32
43