32
– disassemble the right side (10) fol-
lowing the same operations.
3.3.4 Fault finding
Herefater we outline a number of
potential problems that may occur on
the appliance and the relevant list of
actions required. A working fault, in
most cases, provocates the “lock out”
signal onto the control panel of the
control box. When this light turns on,
the burner can operate again only
af t er t he r ese t butt on has been
pressed; if this has been done and a
regular ignition occurs, it means the
failure can be defined momentary and
not dangerous. On the contrary, if the
“lock out” stays, the cause of the fault,
as well as the relevant action must be
made according to the following chart:
The burner does not ignite
– Check the electric connections.
– Check the regular fuel flow, the
cleanness of the filters, of the nozzle
and air vent from the tube.
– Check the regular spark ignition and
the proper function of the burner.
The burner ignites regularly but the
flame goes out immediately
– Check the flame detection, the air
calibration and the function of the
appliance.
Difficulty in regulating the burner
and/or lack of yield
– Check: the regular flow of fuel, the
cleanness of the boiler, the non
obstruction of the smoke duct, the
real input supplied by the burner
and its cleanness (dust).
The boiler gets dirty easily
– Check the burner regulator (smoke
analysis), the fuel quantity, the flue
obstruction and the cleanness of
the air duct of the burner (dust).
The boiler does not heat up
– Control the cleanness of the shell,
the matching, the adjustment, the
burner per formances, t he pr e-
adjusted temperature, the correct
function and position of the regula-
tion stat.
– Make sure that the boiler is suffi-
ciently powerful for the appliance.
Smell of unburnt products
– Control the cleanness of the boiler
shell and the flue, the airtightness of
the boiler and of the flue ducts (door,
combustion chamber, smoke ducts,
flue, washers).
– Control the quality of the fuel.
Frequent intervention of the boiler
shutoff valve
– Control the presence of air in the
system, the function of the circula-
tion pumps.
– Check the load pressure of the appli-
ance, the efficiency of the expansion
tanks and the valve calibration.
3.4
FROST PROTECTION
In the event of frost, ensure that the
central heating plant is functional and
effective frost protection interlocks
are in place to protect against frost
damage
3.5
USER WARNINGS
When faults occur and/or the equip-
ment does not operate correctly, turn
the boiler off and contact the autho-
rised service engineer.
1
10
2
3
8
6
5
7
4
9
Fig. 10
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