Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 118

Troubleshooting
Fault messages for gas condensing module
Fault number System characteristics
on the display
F.379 Burner in a fault state
F.380 Burner in a fault state
F.381 Burner in a fault state
F.382 Burner in a fault state
F.383 Burner in a fault state
F.384 Burner in a fault state
118
(cont.)
Cause
Flame signal is not
present or insufficient at
burner start.
Flame is lost immediately
after flame formation (dur-
ing safety time).
Flame loss in the stabilisa-
tion or operating phase
Error counter expired
Main gas valve does not
close.
Modulation valve does not
close.
Measures
Check gas supply (gas pressure
■
and gas flow switch).
Check gas train.
■
Check system for condensate
■
backup.
Note
To prevent water damage, de-
tach fan unit before removing the
burner.
Check ionisation electrode and
■
connecting cable.
Check ignition:
Connecting cables to ignition
■
module and ignition electrode
Ignition electrode gap and con-
■
tamination (see page 72).
Check ignition electrode for bro-
■
ken ceramic.
Reset burner.
Check gas supply (gas pressure
and gas flow switch).
Check balanced flue system for
flue gas recirculation.
Check ionisation electrode for the
following:
Distance to burner gauze assem-
■
bly (see page 72)
Contamination on electrode
■
Reset burner.
Check gas supply (gas pressure
and gas flow switch).
Check balanced flue system for
flue gas recirculation.
Check ionisation electrode for the
following:
Distance to burner gauze assem-
■
bly (see page 72)
Contamination on electrode
■
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check the gas train and replace if
required.
Reset burner.
Check the gas train and replace if
required.
Reset burner.