30
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 17).
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Ignition electrodes
incorrectly adjus-
ted
Adjust ignition electrodes
(see page 17)
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Insulation body of
ignition electrodes
cracked
Replace ignition electro-
des
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Incorrect gas type
selected
Adjust the gas type (see
page 7)
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Gas train does not
open
Check gas train and
replace if required
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Combustion char-
acteristics not
ideal
Adjust burner (see from
page 12).
25
No flame signal after
safety time; ionisation
flame monitor reports
no flame signal
Incorrect parame-
ter set selected
Adjust the parameter set
(see page 24 to 25)
26
Ionisation flame mon-
itor reports external
light ingress during
start-up or after post-
purge
Short circuit, igni-
tion cables
Remedy short circuit
26
Ionisation flame mon-
itor reports external
light ingress during
start-up or after post-
purge
Short circuit, ioni-
sation cables or
electrode
Remedy short circuit
Troubleshooting
Diagnosis
(cont.)
5692 488 GB