Ferroli SUN G20 Mode D'emploi, Installation Et Entretien page 38

Checking the parts and components
Pump
The pressure must be stable at the value set during installation.
No noise must be produced.
In the case of instable pressure or noisy pump, disconnect the flexible pipe from the line filter and feed
in the fuel from a tank located near the burner. This identifies whether the cause of the anomaly is the
inlet pipe or the pump.
Filters
Check and clean or replace, if necessary, the filters in the line, pump and nozzle.
If there is rust or other impurities in the pump filter, use a separate pump to remove water and other
impurities from the bottom of the tank.
Fan
Check that dust is not accumulated inside the fan and on the rotor blades: this reduces the air flow and
causes, as a consequence, polluting combustion.
Combustion head
Check that all the parts of the combustion head are intact, not deformed by the high temperatures, free
of impurities from the surrounding environment, and correctly positioned.
Nozzle
Avoid cleaning the hole of the nozzle, so as to not damage it.
Replace the nozzle every 2-3 years, or when necessary. Combustion must be checked when changing
the nozzle.
Photo cell
Clean the glass for dust. The photo cell is pushed into place; to remove it, simply pull it out.
Flexible pipes
Check that they are in good condition, that they have not been stepped on or deformed.
Tank
Every 5 years or so, remove the water from the bottom of the tank using a separate pump.
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.
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Possibile causes/Recommended solution
No electrical power /Close the switches, check the fus es
Appliance shut-down/Re set the ap pli ance
Electrical de vic es de fec tive/Replace
Pump blocked/Replace
Electric motor de fec tive/Re place
Elec tri cal con nec tions in cor rect /Check
Pho to 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
Cod. 35442633 - 01/2007 (Rev. 00)
SUN G20