Fer FERtech F 32 D, Instructions For Use, Installation And Maintenance, Page: 17 / 32

FERtech F 24 D - F 32 D
17 EN
4.3 Maintenance
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
•
The control and safety devices (gas valve, flow meter, thermostats, etc.) must func-
tion correctly.
• The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. -The sealed chamber must be
tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
• The air-fume end piece and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. For possible cleaning
do not use chemical products or wire brushes.
• The electrode must be properly positioned and free of scale.
fig. 17 - Electrode positioning
• The gas and water systems must be airtight.
• The water pressure in the cold water system must be about 1 bar; otherwise, bring
it to that value.
• The circulating pump must not be blocked.
• The expansion tank must be filled.
• The gas flow and pressure must correspond to that given in the respective tables.
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 11 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter "
A "): to restore
operation, 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 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.
List of faults
Table. 8
Code
fault
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
Gas valve wiring disconnected Check the wiring
Ignition power too low Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault Check the ionisation electrode wiring
Card fault Check the card
A03
Overtemperature protec-
tion 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
F04 Card parameter fault Wrong card parameter setting
Check the card parameter and modify
it if necessary
F05
Card parameter fault Wrong card parameter setting
Check the card parameter and modify
it if necessary
Fan fault
Wiring disconnected Check the wiring
Defective fan Check the fan
Card fault Check the card
A06
No flame after the ignition
phase
Low pressure in the gas system Check the gas pressure
Burner minimum pressure setting Check the pressures
F07 Card parameter fault Wrong card parameter setting
Check the card parameter and modify
it if necessary
A09 Gas valve fault
Wiring disconnected Check the wiring
Faulty gas valve
Check the gas valve and replace it if
necessary
3
±
0,5
= =
F10 Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the
sensor
Wiring shorted
Wiring disconnected
F11 DHW 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
A16 Gas valve fault
Wiring disconnected Check the wiring
Faulty gas valve
Check the gas valve and replace it if
necessary
F20 Combustion control fault
Fan fault Check the fan and fan wiring
Faulty baffle
Check the baffle and replace it if nec-
essary
Flue not correctly sized or
obstructed
Check the flue
A21 Poor combustion fault
Fault F20 generated 6 times in the
last 10 minutes
See fault F20
A23 Card parameter fault Wrong card parameter setting
Check the card parameter and modify
it if necessary
A24 Card parameter fault Wrong card parameter setting
Check the card parameter and modify
it if necessary
F34 Supply voltage under 180V. 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 connected
Check the sensor
F39 External probe fault
Probe damaged or wiring shorted
Check the wiring or replace the
sensor
Probe disconnected after activat-
ing the sliding temperature Reconnect the external sensor or
disable the sliding temperature
A41 Sensor positioning
Delivery sensor or DHW sensor
detached from the pipe Check the correct positioning and
operation of the sensors
F42 Heating sensor fault Sensor damaged Replace the sensor
F43 Exchanger protection trips.
No H
2
O system circulation
Check the circulating pump
Air in the system Vent the system
F50 Gas valve fault
Modulating Operator wiring
disconnected
Check the wiring
Faulty gas valve
Check the gas valve and replace it if
necessary
A51 Poor combustion fault Inlet/exhaust flue obstruction Check the flue
Code
fault
Fault Possible cause Cure
cod. 354 % 581 - Rev. 0 3 - /201 5