IGNITION FUNCTIONAL CHECK 1
PILOT WILL NOT LIGHT
Ensure there is no debris around the pilot assembly, e.g coal, soot, etc which could short the spark, clean the area. Check for fluff in the pilot aeration hole.
See Diagram 7, arrow A.
IGNITION FUNCTIONAL CHECK 2
NO SPARK
Ensure there is no debris around the pilot assembly, e.g coal, soot, etc which
could short the spark, clean the area.
Consult users |
instructions, retry |
Operate the valve. |
20
NO
Operate the valve.
Is there a spark?
Consult users book
and retry
Ensure gap between the
electrode & thermocouple is
as Dia. 7 & retry. If gap is OK 
then first change the
ignition lead & retry, if still no good then change gas valve
Check isolation tap and
gas meter, retry
Correct and retry
Purge the gas pipes
and retry
YES
NO
YES
NO
NO
YES
Does the pilot light?
NO
Is the control being operated
correctly?
YES
Will the pilot light with a
match
NO
Is the gas turned on to the
appliance?
YES
Is the gas pressure
correct?
YES
Has the system got any
air in it?
NO
*
YES
YES
Light the pilot, does the | NO |
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Is the control being operated |
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valve click? |
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| NO | NO |
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Is the gap between the |
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electrode & thermocouple as |
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in Dia. 7? |
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Has ignition lead become | YES |
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detached or is connection | Correct and retry |
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poor? |
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| Check for defective or |
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| damaged control knob |
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Remove the electrode lead |
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from electrode with insulated |
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pliers hold the tip 3.5mm |
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from the pilot pipework, is |
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there a spark when the valve |
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‘clicks’? |
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| Remove the electrode lead |
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| YES | from the piezo. Operate the |
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Is the electrode wire | valve. Does a spark jump |
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detached from the piezo in |
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the valve? |
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| YES |
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FAULT FINDING
There is a blockage in the system, check the inlet test point, the mag
seating, valve and pilot filter.
See “NO SPARK” chart* | System OK |
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Replace the gas valve, retry |
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| Replace the electrode lead | ||
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| Replace the gas valve and retry | |
Replace the ODS unit | |||
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