Viessmann VITODENS 222-F Installation And Service Instructions Manual page 77

Fault messages
(cont.)
Fault number System characteristics
on the display
F.355 Burner in a fault state
F.357 Burner in a fault state
F.359 Burner in a fault state
F.361 Burner in a fault state
F.365 Burner in a fault state
F.366 Burner in a fault state
Cause
Analogue signal reference
check: Flame signal is al-
ready present at burner
start.
Insufficient gas supply
No ignition spark
Flame signal is not
present or insufficient at
burner start.
Relay contact gas valve
feedback implausible
Gas valve electricity sup-
ply does not turn off.
Troubleshooting
Measures
Check system for condensate
backup.
Note
To prevent water damage, detach
fan unit before removing the burn-
er.
Reset the appliance.
Check that the gas shut-off valve is
open.
Optically check input-side screen
in the gas train for contamination.
Test static gas pressure and gas
flow pressure. Check that on-site
gas line and gas flow switch are
correctly sized.
Note
If the building pressure regulator
has a leak, you may notice rising
pressure when the burner is idle.
When the system is restarted, the
gas flow switch may trip.
Reset the appliance.
Check connection cables and
leads from ignition module and ig-
nition electrode.
Check for a voltage of 230 V~ at
the ignition module during the igni-
tion phase
Check whether the ignition elec-
trode insulation is damaged.
Reset the appliance.
Check ionisation electrode and
connecting cable. Check plug-in
connections for loose contacts.
Note
Deposits on the electrodes indicate
foreign bodies in the combustion
air. Check the installation room and
flue system for causes of the de-
posits. For example: Laundry de-
tergents, cleaning agents, toilet-
ries, deposits in the ventilation air
supply (chimney).
Reset the appliance.
Reset the appliance.
Reset the appliance.
77