59
FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING
ESPRIT 2 - Installation and Servicing
85
L.....F..... (FLAME DETECTION ERROR)
Check the ignition electrode and associated harness
for: continuity, visual condition
,
position
(Refer to Frame 63).
Are these functioning correctly ?
Check gas valve
wiring for
continuity
YES
Check the detection electrode and
associated harness for:
continuity, visual condition, position
(
Refer to Frame 64
).
Replace as necessary.
If the boiler reset button is
pressed does the boiler ignite for
a short time then extinguish?
Is 200V DC supply available
at the gas valve ?
(see Note)
NO
YES
YES
Is gas pressure available at
the boiler inlet ?
Replace PCB
Check gas supply
and rectify fault
Replace ignition electrode and associated
harness as necessary
NO
Replace gas valve
YES
NO
NO
Note.
Due to the wave form of the rectified voltage, the reading will vary depending on the type of meter used to
measure the value (some may measure the possible peak voltage of 339V). In general terms a reading greater
than 150V indicates that the correct voltage is supplied to the gas valve.
Check spark generator and associated
harness for continuity and visual condition.
(Refer to Frame 65).
Are these functioning correctly ?
Replace spark
generator
YES
NO
Check syphon
and condensate
drain pipework for
blockage
206091-1.pmd 26/05/2010, 16:0959
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