Checking Boiler Control Operation
To check the Boiler Control for correct operation,
proceed as follows:
– Withdraw the Boiler Control (Fig. 2) from the
Control Panel.
– Once the Boiler Control has been detached
from the control panel, keep the "Service
Selector" key pressed while replacing the Boiler
Control in its original position. Do not release
the key until the Boiler Control has been in
place for 3 seconds.
– After releasing the "Service Selector" key, the
screen will light up and will show all the symbols
relating to the services included in the Boiler
Control.
– Press the "Service Selector" key again. The
screen will go out.
– Press the "Service Selector" key a third time
and the screen will show a scale with five
segments and the letters 'tc' next to it.
– Press, in sequence, the keys next to ,
and bar. The segments on the scale will
go out one by one.
– Press the "Service Selector" key. The screen
will show the letters 'fn'.
– Withdraw the Boiler Control from the Control
Panel, and then replace it. The Boiler Control
will operate normally.
Fault Codes
It is possible to identify the fault causing the control
panel to lockout (and shutdown of the relevant
heating unit) by means of a two-digit code. All
faults will cause the red LED next to the
up. Certain faults can be corrected without the
intervention of a qualified professional, as they
can be handled by the user. These can be
identified simply because the LED next to the
will light up or, in the case of faults related to the
fill pressure, the red LED next to bar will also
light up.
To solve all other faults, it will be necessary to
call a qualified technician. These are identified by
the LEDs next to
and
lighting up at the same
time.
Coded faults are detailed below. The Installer/
Service Engineer will be able to identify the fault
(from the Control Panel) which caused the lockout
and so apply the necessary corrective action
from the eight options listed below.
1 – Red LED next to the
lights up. Burner
lockout.
N
º
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L
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1
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1
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1
4
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8
The display for the user is that no service
symbol is showing in the box above the Boiler
Control Screen, but the scale that was
displayed at the time of the fault remains.
Standing in front of the Control Panel, press
the keys next to the
time and the screen will flash 5 times before
showing code 01.
The pumps and the 3-way valve will be OFF
except for the "Frost protection" and
"Maintenance" features.
The V3V remains in an intermediate position.
Please check that the fuel tank is not empty,
the power and fuel supplies to the burner
are correct and, in any case, press the
illuminated lockout reset button on the burner
itself.
When service to the burner is re-established,
the control panel is reset and stand-by
operation is restored.
2 – Red LEDs next to the
,
,
Lockout for lack of, or excess pressure. The
boiler pressure was below the minimum set
value or above the maximum set value for
30 seconds.
Standing in front of the Control Panel, press
the keys next to the
time and the screen will flash 5 times before
showing code 02 (lack of pressure) or 03
(excess pressure).
The display for the user is that no service
symbol is showing in the box above the
screen and the pressure scale with its instant
value and the maximum and minimum limits
(non-modifiable) has replaced the scale
to light
showing at the time the lockout occurred.
The burner, pumps and 3-way valve are OFF.
The V3V remains in an intermediate position.
Should pressure be too low, check for water
leaks in the system. Add or remove water
from the system until the pressure falls within
the maximum and minimum limit values on
the scale.
Once pressure stabilizes, press the key next
to bar. The symbol
above the Boiler Control and stand-by
operation is restored.
3 – Red LED next to the
tripping the Limit Thermostat (1) located in
the Control Panel or Connections Base.
Standing in front of the Control Panel, press
the keys next to the
time and the screen will flash 5 times before
showing code 04.
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The display for the user is that no service
symbol is showing in the box above the
screen and the boiler temperature scale with
the segment at 80 °C (non-modifiable) has
replaced the scale showing at the time the
lockout occurred.
The burner is OFF.
Water is sent to the radiator circuit until the
boiler temperature drops below 80 °C. After
that, the pumps and the 3-way valve will be
OFF except for the "Frost protection" and
"Maintenance" features.
The V3V remains in an intermediate position.
Allow the temperature of the water in the
boiler to drop below 80 °C. Open the door.
Press the Limit Thermostat reset button.
Stand-by operation is restored.
4 – Red LEDs next to the
Standing in front of the control panel and the
screen showing no contents, press the keys
next to the
the screen will flash 5 times before showing
code 11 to indicate that the Limit Thermostat
(1), located in the Control Panel or
Connections Base, has failed.
The temperature of the water in the boiler
has reached 114 °C and there has been no
lockout on tripping the Limit Thermostat.
The burner is OFF.
Water is sent to the radiator circuit until the
boiler temperature drops to 80 °C. After that,
the pumps and the 3-way valve will be OFF,
except for the "Frost protection" and
"Maintenance" features.
Allow the temperature of the water in the
boiler to drop below 80 °C.
Repeat the process described in the section
under "Checking Operation of the Limit
Thermostat" in the Instructions that
accompany the boiler. If the result is
satisfactory, press the reset button on the
Limit Thermostat to restore normal operation
(code 00 on the screen); otherwise, replace
the thermostat.
Press the keys next to
a time to restore the screen with the pressure
scale. The symbol
box above the screen.
With the "Service Selector" key choose the
desired mode. Normal operation of the Boiler
Control is restored.
5 – Red LEDs next to the
Standing in front of the control panel and the
screen showing no contents, press the keys
"
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and
light up.
and
symbols at a time and
and
symbols at
will be showing in the
and
light up.
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