F2 Or Fn Or Ln' - Flame Loss; F3' - Fan Fault - Ideal Boilers Atlantic 24 Installation & Servicing Instructions Manual

4.7 'F2 OR FN OR LN' - FLAME LOSS

Does the boiler ignite for a short
time and then extinguish?
YES
Is the top flue manifold seal present
and correctly fitted. ?
YES
Check if condensate pipe is
blocked. Check if flue is blocked.
Replace as necessary.
Re-fit correctly or replace

4.8 'F3' - FAN FAULT

Does the wiring from the Fan to the PCB have
secure connections at both ends and has not
deteriorated? Does the wiring have continuity?
Is there 230Vac at the Blue and Brown connections
to the 3 way connection on the Fan?
58
SECTION 4 - FAULT FINDING
NO
Is the Gas Pressure available at
the Boiler Inlet (18 mbar)?
Is 24Vdc supply available at the
Gas Valve while the flame is on?
NO
Check spark generator and
associated harness for: continuity
and visual condition. (Refer
to Section 3.15) Are these
functioning correctly?
Check ignition electrode and
associated harness for: continuity,
visual condition and position.
(Refer to Section 3.13) Are these
functioning correctly?
Check siphon and condensate
drain pipe work for blockage and
rectify if necessary. Boiler now
working OK?
YES
NO
YES
Check wiring from gas
NO
valve to PCB for continuity.
If the wiring is OK then
replace the PCB
YES
NO
Replace Spark Generator
and Harness as necessary.
YES
NO
YES
NO
NO
Rectify Wiring &
connections
NO
Replace PCB
YES
Replace Fan
Check gas supply and
rectify fault
Replace Ignition
Electrode and
associated harness as
necessary
Replace Gas Valve
Installation and Servicing