Unit installation

41
Fault code System characteris-
tics
Cause Measures
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Ionisation elec-
trode incorrectly
adjusted
Adjust ionisation elec-
trode (see page 24).
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Ignition electrodes
incorrectly adjus-
ted
Adjust ignition electrodes
(see page 24).
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Insulation body of
ignition electrodes
cracked
Replace the ignition elec-
trodes
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Incorrect gas type
selected
Adjust gas type (see
page 9).
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Gas train does not
open
Check the gas train and
replace if required
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Combustion char-
acteristics not
ideal
Adjust burner (see from
page 14).
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
Incorrect parame-
ter set selected
Adjust the parameter set
(see page 36 to 37).
25 No flame signal after
the safety time; the
ionisation flame mon-
itor reports no flame
signal
285 kW burner for
open flue opera-
tion
Adjust burner settings
(see page 46).
Troubleshooting
Diagnosis
(cont.)
5692 907 GB