Viessmann VITOTRONIC 200 Service Instructions Manual page 119

System overview
(cont.)
System overview for cascade
A
B
46 41 42
C
3 1
D
57
56
E
57 55
F
3412 2410
G
H
K
L
Fig. 17 Set temperatures are highlighted white.
A to L :
For the meaning of the symbols and values, see fol-
lowing table.
Meaning of the symbols and values
The indicated information is identical for all columns.
Line Symbol/value
A
to
to
B
46 (value on
C
left)
41 (value on
right)
1 to 3
D
56
E
/
37 39 34 45
2 1
57 43
58 0
2311 2619
"Manual mode" is set (see "Vitotronic 200" operating instructions). The heat pump
is not available for operation in the heat pump cascade.
Lead heat pump
Lag heat pump 1 to lag heat pump 4 in line with "Number of heat pump in cas-
cade 7707":
If no runtime balancing has been set, the lag heat pumps are started consecutively
in ascending number order.
The lag heat pump is present, but cannot be started on demand, e.g. in the event
of a fault.
There are fault messages for the heat pump. For calling up messages on the rele-
vant heat pump control unit: See chapter "Messages".
Central heating
DHW heating
Secondary circuit flow temperature in °C
Secondary circuit return temperature in °C
Stage of instantaneous heating water heater
Instantaneous heating water heater (connected to the heat pump control system)
Set compressor output in %
Central heating
Central cooling
Defrost
40 48 43
3
59
57
2146
Set compressor frequency in Hz
Diagnosis
119