DELAYED IGNITION, BURNERS STARTS VIOLENTLY
BURNER FAILS TO START AFTER NORMAL OPERATION
Remedies
Situation
Possible causes
BURNER FAILS TO START
Check ignition transformer. Check electrode
gap and porcelain
Reset overheat device. Find reason for its
operation and rectify
Check or replace fuse if necessary. Check
reason for failure
Check operation of magnetic valve
Check that photocell is not seeing ambient light
Motor runs
Flame instability
Burner pre-purges
Burner locks out
Motor runs
Photocell failed
Control faulty
Confirm with new photocell
Confirm with new control. (NB. it is advisable to
change the photocell if also changing control)
Burner pre-purges
Burner locks out
No oil
Check that H.T. leads are sound and are not
arcing other than at electrode gap
No flame occurs
Check oil supply to burner - check that pump
is not airlocked
Burner fails to start
Lamp not lit
Fuse has blown
Appliance thermostat has not reset
Appliance overheat device has operated
Control relay or photocell defective
Adjust thermostat
Check by replacement
Motor runs
Burner runs to lockout
No oil being delivered
Excessive flue draught is preventing
flame establishment
No spark
Check that tank, oil lines, fire valve, pump and
nozzle are all in good order
Rectify condition
Excessive draught
Adjust the burner
Burner pulsates on start-up
Nozzle partly blocked
Oil pressure too low
Flue blocked or damaged
Fan slipping on shaft
Pump coupling loose or worn
Replace nozzle
Check and adjust
Check and rectify
Check and retighten
Delayed ignition
Check the electrode adjustment, see diagram
Check electrodes for damage
Check H.T. leads for damage and disconnection
Check and replace
Incorrect head settings
Low oil pressure
Photocell not seeing light
Excess air
Burner pulsates on start-up
only with hot flue
Burner starts violently
False light
No spark
Check oil pressure
Check that photocell is clean and unobstructed
Check nozzle to burner head dimension and
electrode position
Adjust air damper
Flame occurs
171 915 01 08-01
FAULT LOCATION
