40
3.16 - ERROR CODES
Fault that does NOT cause the boiler to stop:
- The error code is displayed, the boiler has a heat-
ing request, Reset icon (informing that a failure has
been detected, even if the fault was temporary).
Therefore, you must always carry out reset to can-
cel the word “Error” displayed.
Fault that causes the boiler to stop:
- The error code is displayed, the boiler has stopped
running. After solving the failure, press Reset to
restart the boiler.
( Num ) = see key Par. 2.2
CODE DESCRIPTION
detected on BMM
SOLUTIONS
01
SAFETY THERMOSTAT
Triggering of the safety thermostat (10)
Press the release button on the panel and/or check that the thermostat
and its connections are not blocked, and make sure the INTC switches
are closed (position 1)
04
BURNER
No gas or failed burner ignition
Check the gas supply or that the ignition/detection electrode is working
properly (4).
05
FLAME LOSS
DURING
OPERATION.
Check the detection electrode
06
HIGH TEMPERATURE
Boiler temperature too high
Check pump operation and if needed
clean the heat exchanger (24)
10
INTERNAL FAULT
11
Flame detection prior to ignition (parasite
ame)
12
HEATING SENSOR (11)
Heating sensor fault
Check the eciency of the sensor (see Res/Temp table) (Par.4) or its
connections.
14
RETURN SENSOR (if present)
Auxiliary (SRR) sensor interrupted
Check the wiring, if needed, replace the auxiliary sensor (22)
15
INSUFFICIENT WATER
CIRCULATION
Primary circuit water circulation insu-
cient (∆t > 40° C)
Check pump operation and its speed - remove any obstructions in the
heating system
16
HEAT EXCHANGER
FREEZING ( 24 )
Heat exchanger freezing is detected. If
the heating sensor detects a temperature
below 2° C, burner ignition is inhibited
until the sensor detects a temperature
above 5°C.
Disconnect power, close the gas valve, defrost the heat exchanger
carefully.
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