Viessmann VITOTRONIC 200 Service Instructions Manual page 306

PCBs and connection options
EEV PCB [4]
For allocation to heat pump type: See "Overview of
PCBs".
S
R
P
O
N
230 V
50 Hz
L1
Fig. 76
Modbus: Inverter control
A
Modbus: Fan control
B
Modbus: Connecting cable to the controller and
C
sensor PCB, connection X18
Electronic expansion valve for suction gas super-
D
heating (AHX)
Electronic expansion valve for refrigerant collector
E
level control (PHX)
Low pressure sensor
F
High pressure sensor
G
Suction gas temperature sensor (upstream of com-
H
pressor) (NTC 10 k
Ω
306
A B
+ - 5V + -
J15 J19
J17
J14
J12
J5
)
C
D E
M
+ -
1~
1~
J22 J11
Liquid gas temperature sensor (downstream of
K
condenser) (NTC 10 k
L Liquid gas temperature sensor (downstream of
refrigerant collector) (NTC 10 k
Suction gas temperature sensor (downstream of
M
evaporator) (NTC 10 k
Refrigerant collector level sensor
N
Internal power supply (factory connection)
O
Digital input 230 V~
P
4-way diverter valve
R
Intermediate injection solenoid valve
S
M
J7
P
F
P
J10
G
ϑ
H
ϑ
J13
K
ϑ
L
ϑ
M
J21
J25
N
J26
)
Ω
)
Ω
)
Ω