SUN G50 - G70
38
Cod. 35445644 - 08/2007 (Rev. 00)
GB
Checking the parts and components
Pump
The pressure must be stable at the value set during installation, and in any case between 10 and 14
bars. 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.
Nozzles
Avoid cleaning the hole of the nozzles, so as to not damage them
Replace the nozzles 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.
No electrical power /Close the switches, check the fus es
Appliance shut-down/Re set the ap pliance
Electrical de vices de fective/Replace
Pump blocked/Replace
Electric motor de fective/Replace
Electrical con nections in correct /Check
Photo cell short-circuited/Replace the pho to cell
External light strikes the photo cell/Elim inate 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
The burner does not ignite
During pre-ventilation, the
burner shuts down
The burner performs the pre-
ventilation and ignition cy cle,
but there is no flame and the
burner shuts-down.
3.4 Troubleshooting
Problem
Possibile causes/Recommended solution
