Viessmann VITOTRONIC 200 Service Instructions Manual page 113

System overview
(cont.)
Column 3 : Heat pump
Line Symbol/value
A
B
D
No symbol
E
F
H
L
Column : Heat pump with 2-stage refrigerant circuit: Compressor 2
5
Row Symbol/value
A
H
Column : Solar thermal system or solar air absorber
6
Line Symbol/value
A
50
B
C
48
D
E
Heat pump
DHW heating
Instantaneous heating water heater
No flow switch present in the secondary circuit.
Secondary circuit flow rate monitoring is switched off, e.g. when the compressor
■
is switched off.
Secondary circuit flow rate exceeds minimum flow rate: See heat pump specifica-
■
tion.
Heat pump specification
Heat pump installation and service instructions
Secondary circuit flow rate falls below minimum flow rate: Message "Flow
■
switch D6" appears.
Flow switch in secondary circuit is faulty or jumper inserted at X3.3/X3.4
■
Secondary pump
Compressor
—
Primary pump
—
—
Solar thermal system or
solar air absorber
Ice store
Collector temperature or
absorber temperature in
°C
Collector circuit pump or
absorber circuit pump
Cylinder temperature
(DHW cylinder) or ice
store temperature in °C
Ice store summer mode
Heat pump/compressor 1
with 2-stage refrigerant
circuit
Compressor/compressor 1
with 2-stage refrigerant
circuit
Fan
—
Compressor 2
Compressor 2
Solar thermal system
—
Collector temperature in °C
Collector circuit pump
Cylinder temperature (DHW cylinder) in °C
—
Diagnosis
Heat pump
Compressor
—
—
—
—
113