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51
Displayed
fault code
System characteris-
tics
Cause
Measures
Fd
Burner blocked
Fault, burner con-
trol unit
Check ignition electrodes
and connecting cables.
Check whether a strong
interference (EMC) field
exists near the appliance.
Press "Reset" (see
page 51).
Replace control unit if
fault persists.
FF
Burner blocked
Fault, burner con-
trol unit
Check ignition electrodes
and connecting cables.
Check whether a strong
interference (EMC) field
exists near the appliance.
Press "Reset" (see
page 51).
Replace control unit if
fault persists.
–––
Burner blocked
Communication er-
ror between burner
control unit and
programming unit
Check connecting cable.
Press "Reset" (see
page 51).
Replace burner control
unit or programming unit if
the fault persists.
Reset (reset burner control unit)
Press
À
and
¿
simultaneously.
–––
is displayed.
"
¨
" extinguishes and the default display
is shown if the fault has been removed.
Alternatively further faults will be dis-
played.
Scanning the programming unit soft-
ware version
Press
À
and simultaneously.
Troubleshooting
Fault display
(cont.)
5675 991 GB
Service
Summary of Contents for Vitodens 050-W BP JD
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