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– Next clean the burners, blowing air throu-
gh them under pressure.
– Check the positioning and wear of electro-
des.
– Clean the stack union and check the effi-
ciency of the flue.
– After assembly, test the seal of all gas
connections using soapy water or a pro-
duct manufactured for the purpose. Do
not use open flame.
Preventive maintenance and control of the
functioning of the device and its safety sy-
stems must be performed exclusively by
authorised technical service technicians.
4.7
FAULT FINDING
The power supply to the ring is on but the
boiler does not start.
– Check the gas supply to the boiler.
– Check that the safety and control thermo-
stats are closed.
– Gas is not reaching the pressure switch.
– Check that the electronic device is wor-
king, and replace it if necessary.
The boiler comes on and goes off continual-
ly, as does the red gas pressure switch in-
dicator light.
– Check the pressure drop of the gas mains
when the boiler starts up. The dynamic pres-
sure value at the gas valve inlet must be no
less than 9.7 mbar.
– Check the gas line.
– Check for load loss in any solenoid valves
or safety devices installed upstream of
the gas assembly.
– Check gas pressure switch setting and
functioning, and replace the switch if
necessary.
The ignition electrode discharges but the
burner is not ignited.
– There may be air in the pipe the first time
the burner is turned on for the first time
or if it has been inactive for a long time.
The ignition electrode does not discharge.
– The electrical cable is interrupted or is not
properly fastened to terminal 10.
– The device's transformer has burnt out
and must be replaced.
No flame detection.
– The phase and neutral positions on the
terminal board have not been complied
with.
– Check if the ground wire is connected.
– The electrode cable is interrupted or not
correctly fastened to terminal 8.
– The detection electrode is grounded.
– The electrode is very worn or its ceramic
guard has been ruined. It must be replaced.
– The device is faulty and must be replaced.
– Phase/phase electrical lines may require
application of a transformer, code 6239700.
The boiler works only at the rated pressure and
does not permit pressure reduction.
– There is not differential between the set-
tings of the two contacts on the control
thermostat. It must be replaced.
The boiler goes out easily and creates con-
densation.
– Check that the main burner flame is adjusted
correctly and that gas consumption is pro-
portionate to boiler power.
– Poor ventilation in the room in which the
boiler is installed.
– Flue has insufficient draught or does not
meet requirements.
– The boiler is working at temperatures
which are too low. Adjust the boiler ther-
mostat to a higher temperature.
The thermostat turns the boiler on again with a
temperature difference which is too high.
– Replace the control thermostat; it is
incorrectly set.
KEY
1 Baseboard
2 Door
3 Upper front panel
4 Upper front wall
5 Flue gas chamber cleaning plate
6 Cover
7 Burner
Fig. 23
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