23
9.3.1 Main control board of indoor unit
30
29
32
25
26
27
28
31
7
12
11
10
9
18
8
7
5
23
22
24
1
2
13
3
4
6
20
14
15
17
19
16
21
6
8
9
10
5
4
3
2
1
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11
CN7
CN17
CN19
CN30
CN35
CN14
CN31
CN36
1
4
5
2
3
22
CN25
6
CN29
CN40
CN41
9
10
11
12
13
14
15
17
18
19
7
8
16
20
21
23
24
25
26
27
28
29
30
31
Assembly unit
Assembly unit
Order
Order
1
2
3
4
5
8
10
16
17
19
20
21
22
23
24
Port for power supply
Digital display
Port for ground
Port for internal pump
Port for temperature sensors of refrigerant liquid
side temperature of plate heat exchanger
Port for temperature sensors of refrigerant gas
side temperature of plate heat exchanger
Port for temperature board
Communicate port between indoor PCB and
outdoor unit
Port for antifreeze E-heating tape(external)
Port for SV2(3-way valve)
Port for zone 2 pump
Port for outside circulation pump
Feedback port for external temperature
switch(shorted in default)
Feedback port for temperature switch
(shorted in default)
Reserved
Control port for tank booster heater
6
25
26
27
28
Port for temperature sensors of outlet water
temperature of plate heat exchanger
Port for temperature sensors of inlet water
temperature of plate heat exchanger
Port for temperature sensors of final outlet
water temperature of indoor unit
Dip switch
Port for USB programming
Port for flow switch
Port for IC programming
Rotary dip switch
9
11
Port for balanced water tank of up temp. sensor
12
Port for balanced water tank of dowm temp.
sensor
13
Port for domestic hot water tank temp. sensor
14
Port for outlet water for zone 2 temp. sensor
Port for solar panel temp. sensor
Port for
variable speed
pump
Control port for room thermostat (heating mode)
Power port for room thermostat
Control port for room thermostat (cooling mode)
18
Port for smart grid (photovoltaic signal)
Port for smart grid (grid signal)
Port for solar energy pump
Port for DHW pipe pump
Control port for tank booster heater
Control port for internal backup heater 1
Port for SV3(3-way valve)
Control port for internal backup heater 1
29
30
31
Port for anti-freeze electric heating tape(internal)
Port for anti-freeze electric heating tape(internal)
Port for anti-freeze electric heating tape(internal)
Port for anti-freeze electric heating tape(internal)
CN21
POWER
S3
/
DIS1
CN5
GND
CN28
PUMP
CN25
DEBUG
CN4
USB
FS
T2
T2B
TW_in
TW_out
T1
CN6
CN19
CN14
27 28
1 2
3 4 15
5 6 16
7 8 17
9 21
10 22
IBH1/2_FB
IBH1
IBH2
TBH
TBH_FB
25 29
CN7
CN11
CN2
CN1
CN22
Port
Port
Code
Code
Port for communication with the wired controller
Port for Internal machine Parallel
Compressor run/Defrost run
Port for additional heat source
Input port for solar energy
Port for room thermostat
Port for SV1(3-way valve)
/
7
S1
,
S2
,
S4
/
CN8
CN24
Tbt1
CN16
Tbt2
CN13
T5
CN15
Tw2
15
CN18
Tsolar
CN17
PUMP_BP
CN31
HT
COM
CL
CN35
SG
EVU
CN36
M1 M2
Port for remote switch
T1 T2
P Q E
A B X Y E
CN30
1 2 3 4 5 Port for communication with the wired controller
6 7 8
Communicate port between indoor PCB and
outdoor unit
9 10
26 30/31 32
11 23
12 24
13 16
14 17
18 19 20
CN41
CN40
CN42
CN29
HEAT8
HEAT7
HEAT6
HEAT5
V.2
Summary of Contents for ETH220VMA
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