40
Pegasus LN 2S
Cod. 3540G310 - 03/2007 (Rev. 02)
EN
3.4 Troubleshooting
Fault
Cause
Cure
After a few attempts at ignition, the electronic controller shuts down the boiler.
Pilot light nozzles dirty - Clean with compressed air
Check the regular gas flow to the boiler and the air has been eliminated from the pipes.
Check that the electrodes are correctly positioned and free of any deposits (see fig. 16).
Make sure that the boiler is connected to a good earth connection.
Check the electrical connections at the ignition and ionization electrodes.
The electrodes are not discharging in the ignition phase.
Check that the electrodes are correctly positioned and free of any deposits (see fig. 16).
Regulation thermostat adjusted too low.
Check the electrical power supply.
Check the electrical connections at the ignition and ionization electrodes.
Check the connections at the electronic flame controller.
Make sure that PHASE and NEUTRAL are not inverted and that the earth contacts are efficient.
Check the inlet gas pressure and any open pressure switches.
Reset the safety thermostat.
Make sure the room thermostat is closed.
The burner burns poorly: flames too high, too low or too yellow
Gas valve filter dirty
Check the gas supply pressure.
Gas nozzles dirty.
Make sure that the boiler is not dirty.
Make sure that ventilation in the room where the unit is located is sufficient for good combustion.
Smell of unburnt gas
Make sure that the boiler is perfectly clean
Check that the draught is sufficient
Check that gas consumption is not excessive
The boiler works but the temperature fails to increase
Check the 2-stage adjustment thermostat works properly.
Check that the operator of the 2nd stage of the gas valve (full power) is supplied (see Fig. 9)
Check that gas consumption is not less than that provided for.
Make sure that the boiler is perfectly clean.
Check that the boiler is adequate for the system.
Check that the heating pump is not blocked.
Temperature of the water to the system too high or too low
Check the 2-stage adjustment thermostat works properly.
Check that the pump is not blocked.
Make sure that the characteristics of the circulating pump are adequate for the system.
Burner explosion. Delay on ignition
Check that the gas pressure is sufficient and the boiler casing is not dirty.
The adjustment thermostat switches back on with too great a temperature difference
Check that the thermostat bulb is properly inserted in the sheath.
Check the 2-stage thermostat works properly.
The boiler produces condensation water
Check that the boiler is not operating at too low a temperature (below 50°C).
Check that gas consumption is regular.
Check the efficiency of the flue.
The boiler goes out for no apparent reason
Safety thermostat trips due to temperature rise.
N.B. To avoid unnecessary expense, before calling the Customer Technical Assistance Service make sure that the boiler
has not stopped due to no electricity or gas.
