Viessmann VITOTRONIC 200 Service Instructions Manual page 37

Messages
(cont.)
Message
Code/system characteris-
tics
06 Fault refrigrnt circ. 2
See chapter "Diagnosis
refrigerant circuit control-
ler".
07 Message refrigrnt circ.
See chapter "Diagnosis
refrigerant circuit control-
ler".
08 Message refrig. circ.2
See chapter "Diagnosis
refrigerant circuit control-
ler".
0A Fault external unit
The external unit stops.
0B Warning external unit
External unit stops; boos-
ter heaters provide heat-
ing.
Cause
Fault message from EEV
controller (refrigerant cir-
cuit control) heat pump
2nd stage (if installed).
Message from EEV con-
troller (refrigerant circuit
control), heat pump
1st stage.
Message from EEV con-
troller (refrigerant circuit
control), heat pump
2nd stage (if installed).
■ Message relating to
external unit.
■ In connection with fault
A9, the external unit
has shut down too fre-
quently.
Outside temperature out-
side the application limits
-15 °C to +35 °C).
Troubleshooting
Measures
Observe messages in
chapter "Diagnosis refrig-
erant circuit controller".
Observe messages in
chapter "Diagnosis refrig-
erant circuit controller".
Observe messages in
chapter "Diagnosis refrig-
erant circuit controller".
■ Observe messages
relating to the refriger-
ant circuit control of the
external unit (see
page 86).
■ Observe the display val-
ues for temperature and
pressure sensors in the
refrigerant circuit (see
page 86); replace
sensors if required.
■ Check the setting of the
DIP switch in the exter-
nal unit (see
Vitocal 200-S installa-
tion and service instruc-
tions).
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37