Ideal Heating i-mini C24, Installation And Servicing

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Installation and Servicing
SECTION 4 - FAULT FINDING
4.4 ‘L6’ - FALSE FLAME LOCKOUT
4.5 ‘F1’ - LOW WATER PRESSURE
4.6 ‘F2 OR FN OR LN’ - FLAME LOSS
Does the boiler ignite for a short
time and then extinguish?
YES
YES
Is the Gas Pressure available at
the Boiler Inlet (18 mbar)?
Check the detection electrode and
associated harness for: continuity,
visual condition and position
(Refer to Section 3.14). Check if
condensate pipe is blocked. Check
if flue is blocked.
Replace as necessary.
Is the top flue manifold seal present
and correctly fitted. ?
NO
NO
Check gas supply and
rectify fault
NO
YES
Is 24Vdc supply available at the
Gas Valve while the flame is on?
YES
Check spark generator and
associated harness for: continuity
and visual condition. (Refer
to Section 3.15) Are these
functioning correctly?
YES
Check ignition electrode and
associated harness for: continuity,
visual condition and position.
(Refer to Section 3.13) Are these
functioning correctly?
YES
Check siphon and condensate
drain pipe work for blockage and
rectify if necessary. Boiler now
working OK?
Check wiring from gas
valve to PCB for continuity.
If the wiring is OK then
replace the PCB
NO
Replace Spark Generator
and Harness as necessary.
NO
Replace Ignition
Electrode and
associated harness as
necessary
NO
Replace Gas Valve
Re-fit correctly or replace
NO
Restart the boiler, does Boiler Work OK?
NO
Check routing and integrity of internal boiler wiring is OK. Check
condition of Flame Sense Electrode and replace if deteriorated.
Separate the flame detection electrode in-line connector. Is there
continuity between the terminal pins connected to the electrode?
YES
Replace Flame Detection Electrode
Check routing and integrity of internal boiler wiring
YES
NO
RESTART PROCEDURE - To restart boiler, press and release RH push button.
Are the Boiler and CH System filled with water and all isolation and
radiator valves open (check pressure gauge is between 1 to 1.5 bar)?
NO
NO
YES
Fill and vent the system and open all
isolation valves
YES
Are connections on water pressure sensor secure?
Re-fit connections
Replace water pressure switch