Viessmann VITOTRONIC 200 Service Instructions Manual page 74

Troubleshooting
Diagnosis (service scans)
Air/water heat pump
A B
System overview
Ü
1
0
1
10 45
2 41
51
690
2
O
Back with
A to L For explanation, see the fol-
lowing tables.
N Cooling function:
■ Active cooling by reversing
the refrigerant circuit:
■ Heating water buffer cylin-
der bypass during cooling:
The up arrow indicates which
heating/cooling circuit is ena-
bled for cooling.
74
(cont.)
D E F G H K
1
50 45 21 22 23
50
33 21 22 23 18
47 44
29 45 38
45
ä
L
2 3
Ç
20
32 33 15
38 38 10
N
O Fan symbol