QUADRIFOGLIO B
81
EN
cod. 3541F574 - Rev. 00 - 09/2017
4.4 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 cas-
cade, 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. 4 - List of faults
5. TECHNICAL DATA AND CHARACTERISTICS
Key of figures cap. 5
7
Gas inlet
10
System delivery
16
Fan
32
Heating circulating pump (not supplied)
36
Automatic air vent
44
Gas valve
72
Room thermostat (not supplied)
72b
Second room thermostat (not supplied)
81
Ignition electrode
82
Detection electrode
95
3-way valve - 2 wires (not supplied)
A
= Heating phase
B =
Neutral
98
Switch
114
Water pressure switch
130
DHW circulating pump (not supplied)
138
External probe (not supplied)
139
Remote timer control (not supplied)
154
Condensate drain pipe
155
Hot water tank temperature probe (not supplied)
186
Return sensor
188
Ignition/Ionisation electrode
191
Fume temperature sensor
220
Ignition card
256
Modulating heating circulating pump signal
275
Heating system drain cock
278
Double sensor ( Heating)
298
Cascade temperature sensor (not supplied)
299
Input 0-10 Vdc
300
Burner lit contact (voltage-free contact)
301
Fault contact (voltage-free contact)
302
Remote reset input (230 Volt)
306
Heating system circulating pump (not supplied)
307
Heating system second circulating pump (not supplied)
321
Low temperature return
346
High temperature return
348
3-way valve - 3 wires (not supplied)
A
= Heating phase
B =
Neutral
C =
DHW phase
357
Faulty contact (230 Vac)
361
Cascade connection of next module
362
Cascade connection of previous module
363
MODBUS communication
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
Faulty ignition transformer (only models B
220 and B 320)
Check and replace it if necessary
A02
Flame present sig-
nal with burner off
Electrode fault
Check the ionization electrode wiring
Card fault
Check the card
A03
Overtemperature
protection interven-
tion
Heating sensor damaged
Check the correct positioning and oper-
ation 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
intervention
Fault F07 generated 3 times in the last 24
hours
See fault F07
A05
Fan protection acti-
vated
Fault F15 generated for 1 hour (consecu-
tive)
See fault F15
A06
No flame after igni-
tion stage (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 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 necessary
F07
High fume temper-
ature
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 oper-
ation 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
F14
Delivery sensor 2
fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F15
Fan fault
No 230V power supply
Check the 3-pin connector wiring
Tachometric signal interrupted
Check the 5-pin connector wiring
Fan damaged
Check the fan
F26
RESET button on
controller on gas
valve, fault.
RESET button on controller fitted on gas
valve blocked or faulty.
Check the RESET button and replace
the controller on the gas valve if neces-
sary.
F34
Supply voltage
under 170V
Electric mains trouble
Check the electrical system
F35
Faulty mains fre-
quency
Electric mains trouble
Check the electrical system
F37
Pressure switch
contact open
Low system pressure
Check the system water pressure
F39
External probe fault
Probe damaged or wiring shorted
Check the wiring or replace the sensor
Probe disconnected after activating the
sliding temperature
Reconnect the external probe or disable
the sliding temperature
A41
Sensor positioning
Delivery sensor disconnected from the
pipe
Check the correct positioning and oper-
ation of the heating sensor
A42
Heating sensor
fault
Sensor damaged
Replace the sensor
F50
Cascade tempera-
ture sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F52
Heating sensor
fault
Sensor damaged
Replace the sensor
A61
Controller fault
Controller internal error
Check the ground connection and
replace the controller if necessary.
A62
No communication
between controller
and gas valve
Controller not connected
Connect the controller to the gas valve
Valve damaged
Replace the valve
A63
A64
A65
F66
Controller fault
Controller internal error
Check the ground connection and
replace the controller if necessary
F99
No communication
between controller
and display
Wiring disconnected
Check the wiring of the 6 wires between
controller and display
Fault
code
Fault
Possible cause
Cure
