Viessmann VITODENS 200-W Installation And Service Instructions Manual page 106

Troubleshooting
Fault messages
(cont.)
Displayed fault System characteristics
code
EB Burner in a fault state
EC Burner in a fault state
Ed Burner in a fault state
EE Burner in a fault state
106
Cause
Process fault: Shutdown
during calibration.
Parameter error during
calibration
Internal fault at control unit Press reset button R. Replace con-
Flame signal is not
present or insufficient at
burner start.
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 44).
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 44).
Check ignition electrode for bro-
■
ken insulation.
Press reset button R.