Viessmann VITOPEND 200 - Page 24

Yes
Ignition
No
Fault F4 Check 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 vol-
tage 230 V~);
check the gas
supply pressure
Yes
Ionisation cur-
rent builds
(higher than
4 µA)
Symbol A
No
Fault F4 Check the ionisa-
tion current,
check the elec-
trode adjustment
and the gas pipe
for airlocks.
Yes
Burner in opera-
tion
Stops below the
set boiler water
temperature and
restarts immedi-
ately
Check flue gas
system for sound-
ness (flue gas re-
circulation),
check gas flow
pressure
For further information, see page 78
Further details regarding the individual steps (cont.)
24
Commissioning, inspection, maintenance
5862 831 GB