35
Bentone
9. Fault Location
9.1 Burner will not start
Symptom
Motor starts
Burner pre-ventilates
Flame formed
Burner trips
Motor starts
Burner pre-ventilates
No flame formed
Burner trips
Motor does not start
Causes
Unstable flame
Excess air
Low oil pressure
Incorrect combustion apparatus settings
Flame monitor does not register light
Defective flame monitor
Defective oil burner control
No oil
False light
No spark
Preheater does not get up to temperature.
Remedies
Adjust the damper
Check the oil pressure
Check the nozzle in relation to the
combustion apparatus dimensions and the
ignition electrode position
Check the flame monitor is clean and can
register light
Check with using new photocell
Check using new oil burner control (Note:
replacement of photocell recommended if oil
burner control replaced)
Check the oil supply to the burner and that
there are no air bubbles in the pump
Check function of solenoid
Check flame monitor does not register
ambient light
Check high voltage wiring and ignition
electrodes
Check preheater function
Symptom
Burner does not start
Burner pre-ventilates
Burner stops
Causes
Fuse blown
Boiler thermostat has not reset
Preheater does not get up to temperature
Overheating protection has deployed
Defective preheater
Defective oil burner control or
flame monitor
No oil supply
Too great a pressure drop at brake plate
Too strong draught prevents flame forming
No spark
Preheater temperature too low
New oil type
Remedies
Check and replace fuse as necessary.
Investigate cause of fault
Adjust thermostat
Check preheater function
Reset the overheating protection.
Investigate the cause of its deploying.
Remedy fault
Check by replacing with new
Check that tank, oil lines, solenoid valves,
pump and nozzle are in good condition
Adjust the burner
Correct the boiler draught
Check the ignition transformer. Check the
ignition electrode settings and ceramics
Check preheater function
Adjust the preheater‘s set operating tem-
perature
Check that the oil used has the physical
parameters that the burner is rated for. If not,
change the oil.
9.2 Burner will not start after normal use
165 105 09
