Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 99

Fault codes
(cont.)
Fault code dis- System characteristics
played
EB Burner in a fault state
EC Burner in a fault state
ED Burner in a fault state
EE Burner in a fault state
Cause
Process fault: shutdown
during calibration.
Parameter error during
calibration
Internal fault at control unit Press reset button R. Replace con-
Flame signal at burner
start not present or insuffi-
cient.
Troubleshooting
Measures
Check system for condensate
■
backup.
Note
To prevent water damage, de-
tach fan unit before removing the
burner.
Remove the condensate backup.
Press reset button R.
Check the gas supply pressure.
■
Check gas train strainer on the
inlet side for contamination.
Check ionisation electrode for
■
contamination.
Check gap between ionisation
electrode and burner gauze as-
sembly (see page 43).
Press reset button R.
Check flue system; remove flue
■
gas recirculation if required.
Press reset button R.
Check that internal H1 extension
■
and any devices connected to it
are correctly connected and
working properly (internal: plug
53/96 power interruption)
Check the connecting cable to
■
the fan unit. Check impeller for
ease of operation.
Press reset button R or
replace boiler coding card and
press reset button R.
trol unit if fault is permanent.
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 43).
Check ignition electrode for bro-
■
ken insulation.
Press reset button R.
99