Operating instructions

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 vol-
tage 230 V);
check the gas
supply pressure
Yes
Ionisation cur-
rent builds
Symbol A
No
Fault F4 Check the ionisa-
tion electrode ad-
justment 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
soundness (flue
gas recirculation),
check the gas
flow pressure
Yes
Automatic cali-
bration of the
combustion con-
trol unit
No
Fault Eb Check the con-
necting cable and
the ionisation
electrode,
check the flue gas
system (flue gas
recirculation)
Further details regarding the individual steps (cont.)
13
Commissioning, inspection, maintenance
5692 672 GB