ECONCEPT TECH 25 C - 35 C
45
EN
4.4 Troubleshooting
Diagnostics
In case of operation faults or problems, the display flashes and the fault identification
code appears.
There are faults that cause permanent shutdown (marked with the letter “
A
”): to restore
operation just press the
reset
button (detail 6 -fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to firstly
eliminate the fault.
Faults marked with the letter “
F
” cause temporary shutdowns that are automatically reset
as soon as the value returns within the boiler's normal working range.
Table of faults
Table. 8 - 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 elimi-
nated from the pipes
Ignition/detection elec-
trode 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 neces-
sary
A02
Flame present signal
with burner off
Electrode fault
Check the ionisation electrode wiring
Card fault
Check the card
A03
Overtemperature pro-
tection activation
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 activation
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
stage (6 times in 4 min-
utes)
Ionisation electrode fault Check the position of the ionisation
electrode and replace it if necessary
Flame unstable
Check the burner
Gas valve Offset fault
Check the Offset adjustment at mini-
mum power
air/fume ducts obstructed
Remove the obstruction from the flue,
fume extraction ducts and air inlet
and terminals
Trap blocked
Check the trap and clean it if neces-
sary
F07
High fume temperature
The exchanger probe
detects an excessive
temperature for over 2
minutes
Check the exchanger
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F11
Return sensor fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F12
DHW sensor fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F13
Exchanger probe fault
Probe damaged
Check the wiring or replace the
exchanger probe
Wiring shorted
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F15
Fan fault
No 230V power supply
Check the 3-pin connector wiring
Tachometric signal inter-
rupted
Check the 5-pin connector wiring
Fan damaged
Check the fan
F34
Supply voltage under
170V
Electric mains trouble
Check the electrical system
F35
Faulty mains frequency Electric mains trouble
Check the electrical system
F37
Incorrect system water
pressure
Pressure too low
Fill the system
Water pressure switch
damaged or not con-
nected
Check the sensor
F39
External probe fault
Probe damaged or wiring
shorted
Check the wiring or replace the sen-
sor
Probe disconnected after
activating the sliding
temperature
Reconnect the external probe or dis-
able the sliding temperature
A41
Sensor positioning
Delivery sensor discon-
nected from the pipe
Check the correct positioning and
operation of the heating sensor
F42
Heating sensor fault
Sensor damaged
Replace the sensor
Fault code
Fault
Possible cause
Cure
cod. 3540R812 - Rev. 07 - 02/2015
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