
81
Fault
code on
the dis-
play
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
F2
X
X
Burner in a fault
state
The tempera-
ture limiter
has respon-
ded
Check the heating
system fill level.
Check the circula-
tion pump. Check
the temperature
limiter and con-
necting cables.
Vent the system.
Press "
E
RESET"
F3
X
X
Burner in a fault
state
Flame signal
is already
present at
burner start
Check the ionisa-
tion electrode and
connecting cable.
Press "
E
RESET"
F4
X
X
Burner in a fault
state
No flame sig-
nal
Check the ionisa-
tion electrode and
cable, measure the
ionisation current,
check the gas
pressure, check
the gas train, igni-
tion, ignition mod-
ule, ignition elec-
trodes and the con-
densate drain.
Press "
E
RESET"
F7
X
X
Burner blocked Short circuit
or water pres-
sure sensor
lead broken
Check the water
pressure sensor
and the connecting
cable
F8
X
X
Burner in a fault
state
The fuel valve
closes too
late
Check the gas
train. Check both
control paths.
Press "
E
RESET"
Troubleshooting
Fault codes
(cont.)
5692 760 GB
Summary of Contents for VITOCONTROL-S, WB2B
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