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boiler protection devices
Boiler protection devices
The boiler is protected from malfunctioning by means of internal checks
performed by the electronic microprocessor P.C.B., which stops the boiler
from operating if necessary.
In the event of the boiler being shut o in this manner, a code appears on
the display which refers to the type of shut-o and the reason behind it.
There are two types of shut-o:
Safety shut-o
This type of error is “volatile”, which means that the boiler starts up again
automatically as soon as the problem which caused the shut-o is re-
moved; the error is indicated by the «Err» symbol which appears on the
display and the error code.
In fact, soon as the cause of the shut-o disappears, the boiler starts up
again and continues to operate normally.
In the event of error 1 08 - Shut-o due to insucient water pressure
inside the heating circuit - the boiler will perform a safety shut-o.
You can increase the pressure by lling the heating circuit.
In this case or if the re-balancing request is performed on a frequent basis,
switch the boiler o, turn the external electric switch to the OFF position,
shut o the gas cock and contact a qualied technician to check for any
leaks of water.
Shutdown
This type of error is “non-volatile”, which means that it is not removed
automatically. To restore normal operation press the button on the
control panel.
The rst gure of the error code (e.g. 1 01) indicates within which
operational assembly the error occurred.
1 - Primary Circuit
2 - Domestic Hot Water Circuit
3 - Internal Electronic Part
4 - External Electronic Part
5 - Ignition and Detection
6 - Air inlet - ue gas outlet
Malfunction warning
This warning is shown by the display in the following format:
5 P1 = FIRST IGNITION ATTEMPT UNSUCCESSFUL
the rst gure indicating the operational assembly is followed by a P
(warning) and the code relating to the specic warning.
Important
If this shutdown occurs frequently, contact an authorised Technical Service
Centre for assistance. For safety reasons, the boiler will permit a maximum
of 5 resets in 15 minutes (5 presses of the RESET button); at the 6th attempt
within this 15-minute period the boiler will shut down and may only be
operated again after the electricity supply has been disconnected. If the
shutdown is occasional or an isolated event, this is not a problem.
Anti-frost Device.
The anti-frost function acts on the central heating ow temperature pro-
be, independently from other regulations, when the electrical supply is
turned on.
If the primary circuit temperature is between 3°C and 8°C the
pump will run (with the diverter valve switching between cen-
tral heating and hot water every 1 minute) until the temperature
reaches > 9°C.
If the ow temperature remains between 3°C and 8°C the pump will con-
tinue to run for a maximum of 20 minutes unless a temperature above >
9°C is detected in the central heating ow, after this the the burner will re
(heating position) until a temperature of > 30°C is detected.
If the central heating ow temperature is < 3°C, the burner will re (hea-
ting position) at minimum power until the temperature reaches > 30°C,
the burner will go out.
If lockout is caused by overheat the burner will not re but the pump will
continue to run (heating position).
The anti-frost device activates only when (with the boiler operating cor-
rectly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
Table summarising error codes
C.H. Flow temp. probe circuit open / short circuit
Insucient water (request lling)
C.H. Return temp. probe circuit open / short circuit
External sensor circuit open / short circuit
Floor Thermostat contact open
Heating delivery probe problem
Insucient circulation indication
Insucient water (request lling)
Too many rells (+ 5 in 50 min)
Too many rells (+ 5 in 7 days)
Too many (> 5) resets in 15 minutes
Room sensor circuit open 7 short circuit
Flame detected with gas valve closed
3 ame cut-os detected in one cycle
Air Inlet / Flue gas outlet
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