Main Pcb [7] / [7-1] - Viessmann VITOTRONIC 200 Service Instructions Manual

PCBs and connection options
Main PCB [7] / [7-1]
For allocation to heat pump type: See "Overview of
PCBs".
S
R
P 20 k
ϑ
O 15 k
ϑ
N
50 k
ϑ
20 k
M
Fig. 82
A Internal power supply (factory connection)
4-way diverter valve
B
Ribbon heater, condensate pan
C
Oil sump heater
D
Electronic expansion valve
E
High pressure sensor
F
Modbus: Connecting cable to the controller and
G
sensor PCB of the indoor unit, connection X18
Control of inverter
H
K Low pressure switch
312
T
U
P P
ϑ
L K H
- +
F
G
L High pressure switch
Suction gas temperature sensor (NTC 20 k
M
Hot gas temperature sensor (NTC 50 k
N
Air intake temperature sensor (NTC 15 k
P
Defrost temperature sensor (NTC 20 k
Q
Inverter power supply
R
Fan control 2 (if installed)
S
T Fan control 1
Jumper (blue) with printed ID (XX): See next chap-
U
ter.
A
N
230 V/
50 Hz
L1
B
C
D
M
E
1~
)
Ω
)
Ω
)
Ω
)
Ω