Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual page 112

Troubleshooting
Fault messages for gas condensing module
Fault number System characteristics
on the display
F.363 Burner in a fault state
F.364 Burner locked out
F.365 Burner in a fault state
F.366 Burner in a fault state
F.367 Burner in a fault state
F.368 Burner locked out
112
(cont.)
Cause
Flame signal is already
present at burner start.
Internal system error
Gas valve relay contact
Burner control unit fails to
switch off power supply to
the fuel valve
Burner control unit fails to
switch off power supply to
the fuel valve
Gas pressure switch fault
Forced ventilation time ex-
pired
Measures
Check system for condensate
backup.
Note
To prevent water damage, detach
fan unit before removing the burn-
er.
Check ionisation and ignition elec-
trode for damage and earth faults
(e.g. contact with the thermal insu-
lation ring).
Check connecting cables from ioni-
sation and ignition electrode.
Reset burner.
Replace burner control unit if fault
is permanent.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check ignition electrodes and con-
necting cables.
Check ionisation electrode and
connecting cable.
Reset burner.
Check gas supply (gas pres-
■
sure).
If installed: Check gas pressure
■
switch for correct function.
If necessary, disconnect the gas
pressure switch connector and
check whether the burner starts.