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Bentone
8. Fault Location
8.1 Burner will not start
Symptom Causes Remedies
Motor starts Unstable flame
Burner pre-ventilates Excess air Adjust the damper
Low oil pressure Check the oil pressure
Flame formed Check the nozzle in relation to the
combustion apparatus dimensions and
the ignition electrode position
Burner trips Incorrect combustion apparatus settings
Check the flame monitor is clean and can
register light
Motor starts Flame monitor does not register light
Burner pre-ventilates Defective flame monitor Check with using new photocell
No flame formed Defective oil burner control Check using new oil burner control (Note:
replacement of photocell recommended if
oil burner control replaced)
Burner trips
Check the oil supply to the burner and
that there are no air bubbles in the pump
No oil
False light Check function of solenoid
Check flame monitor does not register
ambient light
No spark
Check high voltage wiring and ignition
electrodes
Motor does not start Preheater does not get up to temperature.
Check preheater function
Symptom Causes Remedies
Burner does not start Fuse blown Check and replace fuse as necessary.
Investigate cause of fault
Boiler thermostat has not reset
Adjust thermostat
Preheater does not get up to temperature
Check preheater function
Reset the overheating protection.
Investigate the cause of its deploying.
Remedy fault
Burner pre-ventilates Overheating protection has deployed
Defective preheater
Check by replacing with new
Defective oil burner control or
flame monitor
Check that tank, oil lines, solenoid valves,
pump and nozzle are in good condition
Burner stops No oil supply
Too great a pressure drop at brake plate Adjust the burner
Too strong draught prevents flame
forming
Correct the boiler draught
No spark Check the ignition transformer. Check the
ignition electrode settings and ceramics
Preheater temperature too low Check preheater function
New oil type Adjust the preheater‘s set operating
temperature
Check that the oil used has the physical
parameters that the burner is rated for.
If not, change the oil.
8.2 Burner will not start after normal use
165 105 09-2 2021-01-21
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