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User Manual
Anti-frost Device.
When the electrical supply is turned on, the anti-frost function acts
on the central heating ow temperature probe, independently from
other safety devices.
If the primary circuit temperature is between 3°C and 8°C the
pump will run (with the diverter valve switching between central
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
continue to run for a maximum of 20 minutes unless a temperature
above > 9°C is detected in the central heating ow, after this 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
(heating 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
correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
Table summarising error codes
Green Leds
Temperature indicator
Reset
Note
Description ❍ = flashing light
● = lit
40 50 60 70 80 90 yellow red
● ●
X Overheat
●● ●
X Insu cient circulation
●● ●
Insu cient water (request lling)
●● ●
C.H. Flow temp. probe circuit open / short circuit
●● ●
C.H. Return temp. probe circuit open / short circuit
●● ●
External sensor circuit open / short circuit
●● ●
Floor thermostat contact open
●● ●
X Heating delivery probe problem
●● ●
Insu cient circulation
● ●
EEPROM error
● ●
Communication error
●●●●● ●
Too many (> 5) resets in 15 minutes
● ●
X Main P.C.B. error
●● ●
Room sensor circuit open / short circuit
●
X No ame detected
●●● ●
Flame detected with gas valve closed
●●● ●
X Flame lift
●●● ●
1st Ignition Failed
●● ● ●
2nd Ignition Failed
●●● ●
Flame cut-o
●● ●
X Thermofuse open
●● ●
X Fan speed error
Change of gas type
Our boilers are designed to function either with Natural Gas (meth-
ane) or L.P.G. gas. If you need to change from one gas to the other,
one of our Authorised Service Centres must be contacted to convert
the appliance.
Maintenance
Schedule an annual maintenance check-up for the boiler with a com-
petent person.
Correct maintenance generally results in savings in the cost of run-
ning the system.
Failure to arrange an annual service for the appliance will invalidate
the second year of the manufacturer’s guarantee.