35
Maintenance instructions
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4.6 - ERROR CODES
The symbol ashes on the display monitor when the boiler detects an anomaly.
1) In the eve nt of an anomaly that does not stop b oiler operation, press the unbloc
e (D) to display the error code; in the eve nt the b oiler is in stand-b y , the error code
appears and remains îš¿xed on the display.
2) In the event of an anomaly that causes boiler down time, the error code ashes
directly on the display .
Each fault is characterised b y a priority leve l: if two faults are detected at the same
time, the code with the highest priority is displaye d. The fault codes are listed b elow:
( Num ) = see ke y P ar. 2.2
SY MBOL PRIORITY DESCRIPTION SOLUTIONS
0 EX TERNAL PROBE
interrupted
Check the wiring, if needed re-
place the ext ernal prob e
2 HIGH TEMPERATURE
B oiler temperature
too high
Check the operation of pump
( 12) and clean the exch anger,
if required
( 9 )
3 EX CHANGER
FREEZING ( 9 )
Ex changer freez ing is detected
If the heating sensor detects a
temperature b elow 2° C, b urn-
er ignition is inhib ited until the
sensor detects a temperature
ab ove 5°C.
Disconnect the from the power
supply , close the gas va lve ,
defrost the exch anger careful-
ly .
4 SAFETY THERMOSTAT
Interve ntion of the safety ther-
mostat ( 10)
P ress the unb lock b utton ‘‘D’’ on
the panel and/or check that the
thermostat or its connections
are not interrupted
5 DOMESTIC HOT W ATER
SENSOR
Domestic hot water sensor
fault ( 1)
Check the efîš¿ciency of the sen-
sor ( see tab le Res/Temp) and its
connections.
6 HEATING SENSOR
Heating sensor fault ( 11 )
Check the efîš¿ciency of the sen-
sor ( see tab le Res/Temp) and of
its connections.
7 W ATER DEFICIENCY
Insufîš¿cient water pressure and
consequent interve ntion of the
minimum water pressure - pres-
sure switch ( 13 ) .
Restore pressure through the
îš¿lling valve and check for leaks.
Check expansion vessel efîš¿-
ciency .
8 FAULTY PRESSURE SW ITCH
( 19 ) Short circuit / P rob ab le
condensation in the pressure
switch silicone tub es
Check the pressure switch
work s and the connections to
eliminate any condensation
residues. Install a speciîš¿c an-
ti-condensation ki t, if required.
ENGLISH
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ENGLISH
The symbol ashes on the display monitor when the boiler detects an anomaly
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The symbol ashes on the display monitor when the boiler detects an anomaly
unbloc
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unbloc
to display the error code; in the eve nt the b oiler is in stand-b y , the error code
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to display the error code; in the eve nt the b oiler is in stand-b y , the error code
In the event of an anomaly that causes boiler down time, the error code ashes
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In the event of an anomaly that causes boiler down time, the error code ashes
Each fault is characterised b y a priority leve l: if two faults are detected at the same
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Each fault is characterised b y a priority leve l: if two faults are detected at the same
time, the code with the highest priority is displaye d. The fault codes are listed b elow:
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time, the code with the highest priority is displaye d. The fault codes are listed b elow:
( Num ) =
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( Num ) =
see ke y P ar. 2.2
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see ke y P ar. 2.2
OLUTION
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OLUTION
Check the wiring, if needed re
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Check the wiring, if needed re
place the ext ernal prob e
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place the ext ernal prob e
Check the operation of pump
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Check the operation of pump
( 12)
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( 12)
and clean the exch anger,
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and clean the exch anger,
if required
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if required
( 9 )
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( 9 )
Ex changer freez ing is detected
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Ex changer freez ing is detected
If the heating sensor detects a
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If the heating sensor detects a
temperature b elow 2° C, b urn
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temperature b elow 2° C, b urn
er ignition is inhib ited until the
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er ignition is inhib ited until the
sensor detects a temperature
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sensor detects a temperature
ab ove 5°C.
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ab ove 5°C.
Disconnect the from the power
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Disconnect the from the power
supply , close the gas va lve ,
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supply , close the gas va lve ,
defrost the exch anger careful-
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defrost the exch anger careful-
AFETY THERMO
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AFETY THERMO
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Interve ntion of the safety ther
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Interve ntion of the safety ther
mostat
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mostat
( 10)
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( 10)
TIC HOT
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TIC HOT
Domestic hot water sensor
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Domestic hot water sensor
fault
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fault
6 HEATING
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6 HEATING
6 HEATING
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6 HEATING
Heating sensor fault
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Heating sensor fault
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