Viessmann VITOPEND 200 Installation And Service Instructions Manual page 85

Fault codes
(cont.)
Display Const. Weath.‐
fault comp.
code
F3 X X
F4 X X
F5 X X
F6 X X
F8 X X
System char- Cause
acteristics
Burner control Flame signal
unit fault is already
present at
burner start
Burner control No flame sig-
unit fault nal.
Fault on bur- The air pres-
ner control sure switch
unit is closed
during the
burner start
or does not
close when
the ignition
load speed
has been
reached
Fault on bur- The gas
ner control pressure
unit switch is
closed dur-
ing the bur-
ner start or is
not closed at
the end of
the flame
stabilisation
phase
Burner control Fuel valve
unit fault closes too
late
Troubleshooting
Remedy
Check the ionisa-
tion electrode and
connecting leads;
press "E"
Check the ionisa-
tion electrode,
ignition, ignition
module, connect-
ing cables and
leads, gas pres-
sure, gas combi-
nation valve and
the ionisation cur-
rent; press "E"
Check the flue
gas/ventilation
system, the air
pressure switch
hoses, the air
pressure switch
and connecting
leads
Check gas pres-
sure switch, gas
pressure and gas
combination valve
Check the gas
combination valve
and both control
paths; press "E"
85