Rendimax N EL
26
Key
1
Ionisation electrode
2
Ignition electrode
3mm
2
1
13.04 electrode assemblies
fig. 16
14. TROUBLESHOOTING
Fault
Cause and corrective action
After a number of attempts at ignition, the electronic control unit shuts the boiler down
Check that the supply of gas to the boiler is correct and that the air has been eliminated from the pipes.
Check that the electrodes have been positioned correctly and do not contain deposits (see fig. 16).
Check that the boiler is properly earthed.
Check that the gas valve is powered.
Check the connections to the ignition and ionisation electrodes.
In the ignition phase, there is no spark between the electrodes.
Check that the electrodes have been positioned correctly and do not contain deposits (see fig. 16).
Regulation thermostat set too low.
Check the electrical power supply.
Check the connections to the electronic flame control unit.
Check that the phase-neutral wires are not reversed and that the earth contacts are effective.
Check the pressure of the gas at the inlet and any open gas pressure switches.
Reset the flue gas thermostat.
Check that the room thermostat is closed.
