Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 97

Fault codes
(cont.)
Fault code dis- System characteristics
played
E9 Burner in a fault state
Cause
Repeated flame loss dur-
ing calibration
Troubleshooting
Measures
Check the ionisation electrode and
connecting lead (see page 43).
Check plug-in connections for
loose contacts.
Check flue system; remove flue
gas recirculation if required.
Check system for condensate
backup.
Visually inspect gas train inlet and
strainer on the inlet side for con-
tamination.
Note
To prevent water damage, detach
fan unit before removing the burn-
er.
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 deter-
gents, cleaning agents, toiletries,
deposits in the ventilation air sup-
ply (chimney).
If burner gauze assembly and ioni-
sation electrode have been re-
placed, also clean fan unit, gas/air
channel and Venturi extension.
Press reset button R.
97