86
Installation and maintenance instructions 0020297933_07
C.2
Wiring diagram, sensors and actuators
X11
X100 / X106
X27
X25
S20
S21
BUS
5
6
3
4
1
2
L
N
M
p
X21
X22
1
7
8
2
9 18
17
16
15
14
13
12
11
10
3
4
5
6
1
2
1
7
8
2
9 19
20
18
17
16
15
14
13
12
11
10
3
4
5
6
X16
3
1
2
L
N
X13
L
N
X15
3
4
1
2
S
L
N
X14
S
L
N
X1
L
N
X24
6
4
3
2
1
5
7
8
9
12
11
10
13
14
15
16
3
1
2
3
1
2
3
4
1
2
3
4
1
2
p
˽
˽
˽
˽
˽
M
˽
˽
˽
3
1
4
2
p
p
2
3
4
6
5
22
23
25
24
21
20
1
7
8
9
19
18
17
16
15
14
13
12
11
10
26
27
1
HMU PCB
2
Actuation for fan 2, if available
3
Flow rate sensor
4
Connection to the INSTALLER BOARD PCB
5
Heating pump power supply
6
Crankcase heating
7
4-port diverter valve
8
Condensate tray heater
9
Connection to the INSTALLER BOARD PCB
10
Pressure sensor in the low-pressure area
11
Pressure sensor in the heating circuit
12
Temperature sensor on the heating flow
13
Temperature sensor on the heating return
14
Temperature sensor at the air inlet
15
Actuation for fan 1
16
Actuation for the heating pump
17
Temperature sensor downstream of the compressor
18
Temperature sensor upstream of the compressor
19
Pressure switch
20
Temperature monitor
