S.p.A.
12
SUN
TROUBLESHOOTING
FAULTS
PROBABLE CAUSES
REMEDIES
The motor fails to operate
No electricity
a) Check the fuses
b) Check the thermostats
(room, boiler, safety)
The motor operates but the
flame fails to ignite, thus
blocking the appliance
a) No discharge from from
the electrodes
b) Clogged injector
c) No fuel supplied
a) check that the plugs are
in the correct position and
clean them
b) Clean or replace the
injector
c) Check the level of the
heating fuel in the cistern.
Check that no gate val-
ves are closed along the
heating oil line. Check
that the line and pump
filters are clean
The burner starts, the flame
ignites but the appliance
blocks
a) Dirty photoelectric resi-
stance
b) Badly atomizing injector
a) Clean the photoelectric
resistance
b) Clean or replace the
injector
The flame is irregular and
short, with sparks
a) Badly atomizing injector
b) Pump pressure toon low
c) Water in the heating fuel
a) Clean or replace the
injector
b) Chek and raise the pres-
sure
c) Remove water from the
cistern and clean the fil-
ters
Smoky flame
a) Badly atomizing injector
b) Insufficent combustion air
a) Clean or replace the
injector
b) Check that the air lock
opens regularly. Check
that the fan is not dirty
