9.3.1 Main control board of indoor unit
Order
Port
Code
1
CN21
POWER Port for power supply
2
S3
/
Rotary dip switch
3
DIS1
/
Digital display
4
CN5
GND
Port for ground
Port for variable speed pump power
5
CN28
PUMP
input
6
CN25
DEBUG Port for IC programming
7
/
Dip switch
S1,S2,S4,SW9
8
CN4
USB
Port for USB programming
9
CN8
FS
Port for flow switch
Port for temperature sensors of
T2
refrigerant liquid side temperature of
indoor unit (heating mode)
Port for temperature sensors of
T2B
refrigerant gas side temperature of
indoor unit (cooling mode)
Port for temperature sensors of inlet
10
CN6
TW_in
water temperature of plate heat
exchanger
Port for temperature sensors of outlet
TW_out
water temperature of plate heat
exchanger
Port for temperature sensors of final
T1
outlet water temperature of indoor unit
Port for balanced water tank of up temp,
11
CN24
Tbt1
sensor
Port for balanced water tank of dowm
12
CN16
Tbt2
temp, sensor
Port for domestic hot water tank temp,
13
CN13
T5
sensor
Port for outlet water for zone 2 temp,
14
CN15
Tw2
sensor
15
CN18
Tsolar
Port for solar panel temp, sensor
PUMP_
Port for variable speed pump
16
CN17
BP
communication
Control port for room thermostat
HT
(heating mode)
17
CN31
COM
Power port for room thermostat
Control port for room thermostat (cooling
CL
mode)
SG
Port for smart grid (grid signal)
18
CN35
EVU
Port for smart grid (photovoltaic signal)
104
EN
Assembly unit
Order
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Cod. 3QE47660 - Rev. 00 - 02/2022
OMNIA M 3.2
Port
Code
Assembly unit
M1 M2
Port for remote switch
CN36
T1 T2
Port for temperature board
Communicate port between indoor unit
CN19
P Q
and outdoor unit
Port for communication with the wired
CN14
A B X Y E
controller
Port for communication with the wired
1 2 3 4 5
controller
CN30
Communicate port between indoor unit
6 7
and outdoor unit
9 10
Port for Internal machine Parallel
26 30/31 32 Compressor run/Defrost run
Port for antifreeze E-heating tape
CN7
25 29
(extemal)
27 28
Port for additional heat source
1 2
Input port for solar energy
3 4 15
Port for room thermostat
5 6 16
Port for SV1 (3-way valve)
7 8 17
Port for SV2 (3-way valve)
9 21
Port for zone 2 pump
CN11
10 22
Port for outside circulation pump
11 23
Port for solar energy pump
12 24
Port for DHW pipe pump
13 16
Control port for tank booster heater
14 17
Control port for internal backup heater 1
18 19 20
Port for SV3 (3-way valve)
Feedback port for external temperature
CN2
TBH_FB
switch (shorted in default)
Feedback port for temperature switch
CN1
IBH1/2_FB
(shorted in default)
IBH1
Control port for internal backup heater 1
CN22
IBH2
Reserved
TBH
Control port for tank booster heater
Port for anti-freeze electric heating tape
CN41
HEAT8
(internal)
Port for anti-freeze electric heating tape
CN40
HEAT7
(internal)
Port for anti-freeze electric heating tape
CN42
HEAT6
(internal)
Port for anti-freeze electric heating tape
CN29
HEAT5
(internal)
CN32
IBH0
Port for backup heater
22T÷30T