FORCE B
163
EN
cod. 3541T170 - Rev. 00 - 09/2019
3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In the case of a boiler fault, the display will light up,
indicating the fault code and, in case of connection in cascade, the number of the module.
There are faults that cause permanent shutdown (marked by the symbol
OK
to reset): to restore operation, just press
the
OK button
for 1 second or
RESET
on the remote timer control (optional) if installed; if the boiler fails to start, the
fault must be eliminated first.
Other faults cause temporary shutdowns which are automatically reset as soon as the value returns within the boiler's
normal working range.
Table of faults
Table 7- List of faults
Fault
code
Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas flow to the boiler and that
the air has been eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and that it is
correctly positioned and free of any deposits
Faulty gas valve
Check the gas valve and replace it if necessary
Insufficient gas supply pressure
Check the gas supply pressure
Trap blocked
Check the trap and clean it if necessary
A02
Flame present signal
with burner off
Electrode fault
Check the ionization electrode wiring
Card fault
Check the card
A03
Overtemperature pro-
tection intervention
Heating sensor damaged
Check the correct positioning and operation of
the heating sensor
No water circulation in the system
Check the circulating pump
Air in the system
Vent the system
A04
Fume extraction duct
safety device interven-
tion
Fault F07 generated 3 times in the last 24 hours
See fault F07
A05
Fan protection activated Fault F15 generated for 1 hour (consecutive)
See fault F15
A06
No flame after ignition
phase (6 times in 4
minutes)
Ionization electrode fault
Check the position of the ionization electrode
and replace it if necessary
Flame unstable
Check the burner
Gas valve Offset fault
Check the Offset adjustment at minimum power
air/fume ducts obstructed
Remove the obstruction from the flue, fume
extraction ducts, air inlet and terminals
Trap blocked
Check the trap and clean it if necessary
F07
High fume temperature
Flue partially obstructed or insufficient
Check the efficiency of the flue, fume extraction
ducts and outlet terminal
Fume sensor position
Check the correct positioning and operation of
the fume sensor
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F11
Return sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F12
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F13
Fume sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
