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Condition Cause Rectification
Flame sensor
Does not respond to flame Flame sensor defective Replace flame sensor
Motor
Does not run Capacitor defective Replace capacitor
Oil pump seized Replace oil pump
Motor defective Replace motor
Signal lamp flashes orange / red Internal fuse F7 has tripped (Ch. 7.13) Replace internal fuse (6·3A slow)
Check burner components
Replace damaged parts as
necessary
Ignition
No ignition Ignition electrodes short Adjust ignition electrodes
circuited or gap too large
Ignition electrodes dirty and damp Clean ignition electrodes
Insulation cracked Replace ignition electrodes
Ignition cable charred Replace ignition cable, find
cause and rectify
Ignition unit defective Replace ignition unit
Oil pump
Does not supply oil Shut off valve closed Open shut off valve
Suction valve leaking Clean / replace suction valve
Oil line leaking Tighten connections
Pre-filter blocked Clean pre-filter
Anti siphon valve does not open Check valve, if necessary replace
Pump filter fouled Clean pump filter
Filter leaking Replace filter
Oil pump defective Replace oil pump
Loud mechanical noise Oil pump drawing air Tighten connections
Vacuum in oil line is too high Clean filter. Fully open shut off valve
in front of the burner (linked ball
valve)
Oil leaks out as burner motor starts Oil pump solenoid valve is not tight Replace oil pump
Nozzle
Irregular atomisation Aperture partially blocked Replace nozzle
Nozzle filter heavily fouled Replace nozzle
Worn through extended use Replace nozzle
No oil throughput Nozzle blocked Replace nozzle
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