Viessmann VITODENS 200-W Service Instructions Manual page 15

Further details regarding the individual steps
yes
Ionisation current
builds
Symbol A
yes
Burner in opera-
tion
yes
Automatic calibra-
tion of the com-
bustion controller
no
Fault EE
no Stops below the
set boiler water
temperature and
restarts immedi-
ately
Fault E3
no
Fault Eb
Commissioning, inspection, maintenance
(cont.)
Check the ionisa-
tion electrode
adjustment and the
gas line for air-
locks
Check the flue gas
system for tight-
ness (flue gas
recirculation),
check the gas flow
pressure
Ensure adequate
heat transfer.
Press reset button
R.
Check gap
between ionisation
electrode and
burner gauze
assembly.
Check allocation of
gas type (coding
address 82, gas
train setting).
Check flue system;
remedy flue gas
recirculation if
required.
Press reset button
R.
15