Ideal Logic System IE fault F02

What it means

Boiler has detected loss of flame signal during operation.

Likely causes

1. No/low gas pressure at boiler inlet
2. Faulty electrode or harness
3. Faulty spark generator or harness
4. No 24Vdc supply to gas valve while flame is on
5. Wiring fault from gas valve to PCB
6. Faulty PCB
7. Blocked condensate pipe or flue
8. Blocked trap or condensate drain pipe work
9. Faulty gas valve
10. Low gas pressure at boiler inlet
11. Blocked flue
12. Low gas pressure
13. Blocked condensate/trap
14. Flue components not correctly assembled, fixed or supported
15. Flue or flue terminal obstructed
16. Seals on flue extensions displaced during installation
17. Combustion products and inlet air mixing due to flue integrity fault
18. Gas control valve fault requiring replacement
19. Spark generator fault requiring replacement
20. Faulty spark generator causing ignition failure
21. CO/CO2 ratio greater than 0.004 indicates need for cleaning
22. Debris or deposits in heat engine/sump outlet
23. Damaged electrode affecting combustion
24. Condensate trap blockage or drying out
25. Combustion deposits building up on heat exchanger
26. Damaged or worn electrode affecting spark gap
27. Debris in sump outlet or condensate trap
28. Water or gas joint leakage
29. Faulty gas control valve requiring replacement

Where to start

1. Check if boiler ignites for a short time and then extinguishes
2. Check Gas Pressure available at the Boiler Inlet (>18 mbar)
3. Check if 24Vdc supply is available at the Gas Valve while the flame is on