Ideal Logic System IE fault L0D

What it means

Boiler has locked out on ignition failure attributed to blocked flue or condensate system.

Likely causes

1. Blocked flue
2. Blocked condensate pipe/trap
3. Flue components not correctly assembled, fixed or supported
4. Flue or flue terminal obstruction
5. Displaced seals on flue extensions allowing combustion products and inlet air to mix
6. Combustion products and inlet air mixing due to flue integrity fault
7. Incorrect gas type or gas supply pressure/rate not verified prior to commissioning
8. Flue or flue terminal obstructed
9. Seals on flue extensions displaced during installation
10. Incorrect gas rate/pressure
11. Poor combustion
12. Air/gas ratio valve fault
13. Flue restriction or leakage
14. CO/CO2 ratio greater than 0.004 indicating combustion deposits or fouling
15. Debris or deposits in heat engine/sump outlet
16. Damaged electrode affecting combustion
17. Condensate trap blockage or drying out
18. External wall seal dislodged if Mark 1 is not flush with inner wall surface and can be seen prior to the wall surface
19. Combustion deposits building up on heat exchanger
20. Debris in sump outlet or condensate trap
21. Damaged or worn electrode affecting spark gap
22. Water or gas joint leakage

Where to start

1. Refer to Section 4.3: Ignition Lockout procedure
2. Zero the ECGA in fresh air per manufacturer instructions before use
3. Set boiler to maximum gas rate and allow combustion to stabilise before inserting probe