45
icos
-
Installation & Servicing
FAULT FINDING
F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING
70 L.....F....... (FLAME ERROR)
Check the ignition electrode and associated harness
for: continuity, visual condition
,
position
(Refer to Frame 56).
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 57
).
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 ?
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 58. Are these functioning correctly?
Replace
spark generator
YES
NO
Check syphon
and condensate
drain pipework
for blockage
202414-6.pmd
19/02/2008, 13:08
45
Содержание HE30
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