Connection of PCB illustration
A
C
-N
A
C
-N
A
C
-N
A
C
-L
C
O
M
P
1
C
O
M
P
2
V
A
L
1
V
A
L
2
F
A
N
P
U
M
P
H
I
F
A
N
1
2
V
G
N
D
S
Y
S
G
N
D
F
R
O
S
T
G
N
D
WA
T
E
R
G
N
D
M
D
IN
K
Y
IN
1
2
V
G
N
D
N
E
T
G
N
D
M
D
O
U
T
K
Y
O
U
T
Chiller 300
ROOMT PIPE2 PIPE1 OUTWT INWT
Connections explanation:
1 HI FAN High speed for fan
2 PUMP Water pump(220VAC)
3 FAN Fan motor(220VAC)
4 VAL2 4way valve of system2(220VAC)(no use)
5 VAL1 4way valve of system(220VAC)
6 COMP2 Compressor of system2 (220VAC)(no use)
7 COMP1 Compressor of system1 (220VAC)
8 AC-L Live wire
9 AC-N neutral wire
10 KYOUT GND On/Off switch (output)(no use)
11 kDOUT GND Mode output (no use)
12 NET GND 12V Wire controller
13 KYIN On/Off Switch(input)(no use)
14 MDIN Model (input) (no use)
15 WATER GND Flow switch (input)(+normal close)
16 FROST GND Defrost signal(no use)
17 SYS GND 12V System protection(input)(normal close)
18 ROOMT Ambient temp.(input)
19 PIPE2 Temp. Of fan coil2(input)(no use)
20 PIPE1 Temp. Of fan coil1(input)(no use for split type)
21 OUTWT Water out temp.(input)
22 INTWT Water in temp. (Input)
NO . Symbol Meaning
8
SWIMMING POOL HEAT PUMP
