14
Yes
Fan starts
No
after approx. 51 s
fault F9
Check the fan, fan
connecting cables,
power at the fan
and fan control
Yes
Ignition
No
Fault F4
Check the ignition
module (control
voltage 230 V
across plugs
"X2.1" and "X2.2")
Yes
Gas train opens
No
Fault F4
Check the gas train
(control voltage
230 V)
;
check the
gas supply pres-
sure
Yes
Ionisation current
builds
Symbol
A
No
Fault F4
Check the ionisa-
tion electrode
adjustment and the
gas pipe for air-
locks
Yes
Burner in opera-
tion
No
Stops below the
set boiler water
temperature and
restarts immedi-
ately
Check the flue gas
system for sound-
ness (flue gas
recirculation),
check the gas flow
pressure
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 760 GB
Summary of Contents for VITOCONTROL-S, WB2B
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