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SUN G6
3.4 Troubleshooting
Problem
The burner does not ignite
During pre-ventilation, the
burn er shuts down
The burner performs the pre-
ven ti la tion and ignition cy cle,
but there is no flame and the
burner shuts-down.
The flame is ignited normally,
but the burner shuts down at
the end of the safety time
Ignition with pulsating or
dis joint ed flame, delayed
ig ni tion
Pump noisy, fluctuating
pres sure
EN
Possibile causes/Recommended solution
No electrical power /Close the switches, check the fuses
Appliance shut-down/Reset the appliance
Electrical devices defective/Replace
Pump blocked/Replace
Electric motor defective/Replace
Electrical connections incorrect /Check
Photo cell short-circuited/Replace the pho to cell
External light strikes the photo cell/Elim i nate source of light
Electrical devices defective/Replace
Oil valve defective/Replace
No fuel in the tank, or water on the bot tom/Top up fuel or re move the water
Oil supply valve closed/Open
Filters dirty (line – pump - nozzle)/Clean
Pump not primed/Prime and look for cause of loss of prime
Ignition electrodes poorly adjusted, or dirty/Adjust or clean
Nozzle blocked, dirty or deformed/Re place
Head and damper poorly adjusted/Adjust
Electrodes defective or earthed/Replace
Ignition transformer defective/Replace
Electrode cables defective or earthed/Re place
Electrode cables deformed due to high tem per a ture/Replace and pro tect
Electrical connections to the valve or trans form er incorrect /Check
Defective appliance/Replace
Motor-pump joint broken/Replace
Pump inlet connected to the return pipe/Cor rect the con nec tion
Photo cell defective/Replace
Photo cell dirty /Clean photo cell
Defective appliance/Replace
Head poorly adjusted /Adjust
Ignition electrodes poorly ad just ed or dirty /Adjust or clean
Fan damper poorly adjusted, too much air /Ad just
Nozzle not suitable for the burn er or the boiler /See nozzle ta ble
Nozzle defective /Replace
Pump pressure not suitable /Ad just be tween min 10 and max 14 bars
Air in the inlet piping /Tighten the fittings
Too much difference in height between the burner and the tank/Supply burner
using a ring circuit and aux il ia ry pump
Pipe diameter too small /Increase diameter
Inlet filters dirty /Clean
Oil supply valve closed /Open
Paraffin solidification due to low temperature /Add additive to the oil
Cod. 3540C743 - Rev. 01 - 02/2015
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