27/30
Burner lights
but will not hold
on main flame
Oil supply
Excess combustion air
Combustion air too low
Check photoelectric cell
Check main filter for
blockage
Check setting of air flap
Check head setting
Position
Clean filters
Check CO
2
level at flue
Adjust air flap
Adjust head setting
Check control box
Clean
Check oil valve solenoid
Burner lights
but will not hold
on main flame
Insufficient air
High inlet Pressure
Fan limit stat
Air inlets blocked
Outlet nozzles closed
Duct resistance too high
Fan belts slipping
Remove obstruction
Clean filters
Open louvres on nozzles
Open duct Grilles
Incorrect oil pressure
Warm air recirculation
Adjust nozzle position
Ring mains pressure
Oil pressure
Incorrect settings
Faulty
Adjust to manual
settings
Reset
Replace
Adjust fan belts
Check nozzle & pump
filter
Check oil pressure as
per manual
Oil pressure
Check inlet pressure
Incorrect nozzle
Old nozzle
Change to correct
nozzle
