Function Sequence And Possible Faults - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

Function sequence and possible faults

Control unit issues a heat
demand
Yes
Fan starts
Yes
Ignition
Yes
Gas train opens
Yes
Ionisation current builds
Symbol
A
Yes
Burner in operation
Yes
Automatic calibration of
the combustion controller
For further details regarding faults, see page 89.
38
Display
No
No
Fan starts 4 times for
approx. 50 s, followed by
fault F9
No
Fault 81/EE
No Fault 80/EE
No Fault 82/EE
No Shuts down below the set
boiler water temperature and
restarts immediately.
Fault E3
No
Fault Eb
Fault 85/E1/E7/E9/EA
Action
Increase set value and en-
sure heat is drawn off.
Check the fan, fan connect-
ing cables, power to the fan
and fan control.
Check ignition module (con-
trol voltage 230 V across
plugs "X2.1" and "X2.2").
Check the gas supply.
Check the gas train (control
∼
voltage 230 V ); check the
gas supply pressure.
Check setting for ionisation
electrode.
Purge the gas line.
Check the flue system for
tightness (flue gas recircula-
tion); check the gas flow
pressure.
Ensure adequate heat trans-
fer. Press reset button R.
Check gap between ionisa-
tion electrode and burner
gauze assembly. Check allo-
cation of gas type (coding
address 82, gas train set-
ting). Check flue system; re-
move flue gas recirculation if
required. Press reset button
R.
See chapter "Fault messag-
es"