Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 32

Further details regarding the individual steps
Checking outputs (actuators) and sensors
Relay test
H
H
H
H
H
H
H
H
H
Checking sensors
32
1.
2.
b
3.
Please note:
The illuminated heating circuit
selector button indicates the
corresponding heating circuit.
,
1.
2.
a
3.
K d
d
c
b
c
a