Ideal Heating LOGIC SYSTEM S15IE - F2 or Fn or Ln - Flame Loss; Fd - no Water Flow; L6 - False Flame Lockout

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FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING
Ideal Logic System - Installation and Servicing
SECTION 4 - FAULT FINDING
4.4 ‘L6’ - FALSE FLAME LOCKOUT
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 ame detection electrode in-line
connector. Is there continuity between the terminals
pins connected to the electrode?
YES
Replace Flame Detection Electrode
Check routing and integrity of internal boiler wiring.
YES
NO
4.5 ‘Fd’ - NO WATER FLOW
4.6 ‘F2’ OR ‘Fn’ OR ‘Ln’ - FLAME LOSS
Does the boiler ignite for a short
time and then extinguish?
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 ue is blocked.
Replace as necessary
NO
Check gas supply and
rectify fault
NO
YES
Is 24Vdc supply available at the Gas
Valve while the ame 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
NO
RESTART PROCEDURE - To restart boiler, press the “RESTART” button.
Note - ‘Fd’ will only be shown if no water ow is detected for 60 secs and the temperature is less than 40ºC.
Are the boiler and CH system lled with water and all
isolation and radiator valves open?
YES
NO
Fill and vent the system and open all isolation
valves.
Turn power off and on, is the pump rotating?
NO
Check pump and check electrical connection to
pump.
Are connections to water ow sensor secure?
YES
NO
Re-t connector.
YES
Replace water ow sensor.