46
Henrad SE FF
- Installation
Disconnect HT leads from the ignition
electrodes.
Place the leads so that the connectors are
4-5mm apart and clear of other metalwork.
TURN OFF BOILER GAS COCK
Is there a spark between HT leads during an
ignition trial period ?
81 FAULT FINDING CHART 3 - Spark Generation and Ignition
Check leads to the spark generator
YES
Check connections on Board 37. If no fault
found check Board 37 by substitution
YES
NO
NO
NO
Is there mains voltage at the spark generator
during ignition trial period ?
Are the leads at the spark generator correctly
fitted to the tags ?
Rectify faulty connection
YES
Fan and gas supply OK.
Ignition spark suspect
Re-assemble and restore gas supply. Boiler
should now light and 'Burner on' neon illuminate
FAULT FINDING
F
AUL
T FINDING
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Is there mains voltage on Board 37
terminals for the spark generator during the
5 ignition trial periods?
Rectify poor connections or replace spark
generator or electrodes
NO
YES
YES
Is there evidence of the spark 'tracking' (jumping
across electrodes) externally to the burner ?
YES
NO
Replace faulty spark generator
NO
Connect spark leads to the electrode
terminals.
Check that the gap between terminals is
4-5mm and that the distance to the flame strip
is 7mm (± 1mm).
With gas OFF do another ignition cycle.
Is the spark OK now ?
NO
Fit new ignition electrode assembly
Summary of Contents for Henrad SE 30 FF
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