2902936
16
GB
6.
FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for some problems that could cause a failure
to start or a bad working of the burner.
A fault usually makes the lock-out lamp light which is situated inside the reset button of the control box (7,
fig. 1, page 1).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the
burner functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
WARNING
In the event of a burner lockout, more than two consecutive burner reset operations could cause dam-
age to the installation. On the third lockout, contact the Aftersales Service.
DANGER
If further lockouts or burner faults occur, interventions must only be made by qualified, authorised per-
sonnel (as indicated in this manual, and in compliance with the laws and regulations currently in force).
FAULTS
POSSIBLE CAUSES
SOLUTION
The burner doesn’t
start when the limit
thermostat closes.
Electricity power failure.
Check that safety thermostat is not lock out.
Check that the limit thermostat is not
broken.
Check the L-N terminals are powered in
the command and control equipment.
Faulty command and control equipment:
replace.
Faulty resistance.
The red led on the command and control
equipment is off, check the resistance and
replace if necessary.
The burner stays in
pre-purging.
The flame sensor perceives external
light.
Eliminate the source of light.
The flame sensor is in short-circuit.
Replace the photoelectric cell.
T h e b u r n e r p r e -
p u r g e s a n d l o c k s
out without forming
the flame.
The flame does not form.
No fuel: check the supply line, dirty filter.
The ignition electrodes are not correctly
regulated, adjust according to the instruc-
tion manual.
Missing or irregular electric ignition arc,
replace the command and control equip-
ment.
Inadequate, dirty or worn nozzle: replace.
The valve does not excite: replace the coil
or the command and control equipment.
The burner performs
pre-purging and ig-
n i t i o n c y c l e b u t
locks out within the
safety limit.
The flame sensor does not perceive
the flame.
Clean or replace.
