15
7.4 Main Control Board
16
37
28
30
29
31
18
19
20
21
26
23
22
24
25
27
35
34
33
36
1
2
17
3
4
5
14
15
10
11
12
13
6
7
8
9
POWER-
I
POWER-I
OUT1OUT1
H-SEN
H-SEN
P E Q
P E Q
COMM
COMM
S6
S6
32
S6
S6
on/off
FS
CN16
AC 12V
TRANS OUT
CN28
CN29
CN19
X Y E
T9
O
CN9
T9
I
CN8
EEV3/SG EVU CN2
3
T2
T2B
TWin
TWout
CN10
Code
Assembly unit
Code
Assembly unit
1
Power input port from Main control board (CN1)
20
Port for communication with wire controller AB (CN29)
2
Port for communication with Inverter module
(CN43)
21
Port for transformer output(CN28)
3
Port for flow remote switch((CN15)
22
Reserved(CN19)
4
Port for flow switch(CN16)
23
Reserved(CN42)
5
Port for high pressure switch (CN18)
24
Reserved(CN41)
6
Port for low pressure switch (CN17)
25
Port for transformer input(CN40)
7
Port for high pressure sensor(CN3) (Reserved)
26
Reserved(CN38)
8
Port for TL temperature sensor(CN7) (Reserved)
27
Reserved (CN37)
9
Port for TH temp.sensor(CN5)
28
Port for 4-way valve(CN36)
10
Port for TP temp.sensor(CN4)
29
Port for plate heater(CN35)
11
Port for T2,T2B,TW-in,TW-out temp.sensor(CN10)
30
Port for PUMP(CN39)
12
temperature sensor(CN9) (Reserved)
31
Digital display(DSP1)
13
temperature sensor(CN8) (Reserved)
32
Dip switch S5
14
Port for T3,T4 temp.sensor(CN6)
33
Dip switch S6
15
Port for EEV3/SG EVU(CN23)
34
Dip switch S1
16
Port for electrical expansion valve1(CN33)
35
Port for forced cooling(SW1)
17
Port for communication with ammeter(CN22)
(Reserved)
36
Port for point check(SW2)
18
Port for communication with outdoor unit (CN20)
(Reserved)
37
Dip switch S7(Reserved)
19
Port for communication with wire controller PQE
(CN11)
