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SILVER 24T - 34T
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. 10 - List of faults
Fault code
Fault
No burner ignition
A01
Flame present signal
A02
with burner off
Overtemperature pro-
A03
tection intervention
Fume extraction duct
safety device interven-
A04
tion
Fan protection activated
A05
No flame after ignition
stage (6 times in 4 min-
A06
utes)
High fume temperature
F07
Delivery sensor 1 fault
F10
Return sensor fault
F11
DHW sensor fault
F12
Fume probe fault
F13
Delivery sensor 2 fault
F14
Fan fault
F15
Supply voltage under
F34
170V
Faulty mains frequency Electric mains trouble
F35
Incorrect system water
F37
pressure
Possible cause
Cure
Check the regular gas flow to the
No gas
boiler and that the air has been elimi-
nated from the pipes
Check the wiring of the electrode and
Ignition/detection elec-
that it is correctly positioned and free
trode fault
of any deposits
Check the gas valve and replace it if
Faulty gas valve
necessary
Insufficient gas supply
Check the gas supply pressure
pressure
Check the trap and clean it if neces-
Trap blocked
sary
Electrode fault
Check the ionization electrode wiring
Card fault
Check the card
Check the correct positioning and
Heating sensor damaged
operation of the heating sensor
No water circulation in
Check the circulating pump
the system
Air in the system
Vent the system
Fault F07 generated 3
See fault F07
times in the last 24 hours
Fault F15 generated for 1
See fault F15
hour (consecutive)
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 mini-
mum power
Remove the obstruction from the flue,
air/fume ducts obstructed
fume extraction ducts and air inlet
and terminals
Check the trap and clean it if neces-
Trap blocked
sary
The fume probe detects
an excessive tempera-
Check the exchanger
ture
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
Probe damaged
Check the wiring or replace the fume
Wiring shorted
probe
Wiring disconnected
Sensor damaged
Check the wiring or replace the sen-
Wiring shorted
sor
Wiring disconnected
No 230V power supply
Check the 3-pin connector wiring
Tachometric signal inter-
Check the 4-pin connector wiring
rupted
Fan damaged
Check the fan
Electric mains trouble
Check the electrical system
Check the electrical system
Pressure too low
Fill the system
Water pressure switch
damaged or not con-
Check the sensor
nected
cod. 3541I691 - Rev. 00 - 01/2017
Fault code
Fault
External probe fault
F39
A41
Sensor positioning
A44
Heating sensor fault
A42
Exchanger protection
F43
intervention.
Heating sensor fault
F52
Controller fault
A61
ABM03D
No communication
between controller and
A62
gas valve
A63
Controller fault
F64
A65
ABM03D
F66
A23
A24
F20
Card parameter fault
F21
A26
F40
F47
5. TECHNICAL DATA AND CHARACTERISTICS
Table. 11 - Legend - figures cap. 5
7 Gas inlet - Ø 1/2"
10 System delivery - Ø 3/4"
11 System return - Ø 3/4"
14 Pressure relief valve
16 Fan
32 Heating circulating pump
36 Automatic air vent
44 Gas valve
56 Expansion tank
72 Room thermostat (not supplied)
74 System filling valve
81 Ionization/ignition electrode
95 Diverter valve
114 Water pressure switch
138 External probe (optional)
5.1 Dimensions and connections
fig. 27 - Front view
Possible cause
Cure
Probe damaged or wiring
Check the wiring or replace the sen-
shorted
sor
Probe disconnected after
Reconnect the external probe or dis-
activating the sliding
able the sliding temperature
temperature
Heating sensor detached
Check the correct positioning and
from pipe
operation of the heating sensor
Sensor damaged
Replace the sensor
No system H
O circula-
2
Check the circulating pump
tion
Air in the system
Vent the system
Sensor damaged
Replace the sensor
Controller internal error
Check the ground connection and
replace the controller if necessary.
ABM03D
Connect the controller to the gas
Controller not connected
valve
Valve damaged
Replace the valve
Controller internal error
Check the ground connection and
replace the controller if necessary.
ABM03D
Wrong card parameter
Check the card parameter and mod-
setting
ify it if necessary.
139 Remote timer control (optional)
155 Hot water tank probe
169 Noise filter
186 Return sensor
191 Fume temperature sensor
193 Trap
196 Condensate tray
209 Hot water tank delivery connection - Ø 3/4"
210 Hot water tank return connection - Ø 3/4"
155 Hot water tank probe
241 Automatic bypass
256 Modulating heating circulating pump signal
278 Double sensor (Safety + Heating)
350 Fan/Burner assembly
A ON/OFF switch (configurable)
420
EN
27
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