Viessmann Vitodens 200 Service Instructions Manual page 76
Type wb2a, 8.8 to 20.0 kw wall mounted gas fired condensing boiler natural gas and lpg version
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Also See for Vitodens 200:
- Technical manual (180 pages) ,
- Installation instructions manual (148 pages) ,
- Service manual (132 pages)
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Troubleshooting
Fault codes
(cont.)
Display
Const.
Weath.-
fault
comp.
code
F5
X
X
F7
X
X
F8
X
X
F9
X
X
FA
X
X
76
System char-
Cause
acteristics
Burner in a
Air pressure
fault state
switch is not
open at
burner start.
Burner
Air pressure
blocked
switch faulty
Burner in a
The fuel
fault state
valve closes
too late.
Burner in a
Fan speed
fault state
too low dur-
ing burner
start
Burner in a
Fan not at
fault state
standstill
Measures
Check the air
pressure switch
and the intercon-
necting cable.
Check the fan.
Check the fan
connecting
cables. Check the
fan power supply
and fan control.
Check the air
pressure switch
and the intercon-
necting cable.
Check the gas
train. Check both
control paths.
Press "E".
Check the fan,
check the fan
connecting cables
and supply, check
the fan control.
Press "E".
Check the fan, fan
connecting cables
and fan control.
Press "E".
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