Ferroli DOMIcondens F 28 Instructions For Use, Installation And Maintenance page 7

DOMIcondens F 28
Checks during operation
• Switch the unit on.
• Check the tightness of the fuel circuit and water systems.
• Check the efficiency of the flue and air/fume ducts while the boiler is working.
• Make sure the water is circulating properly between the boiler and the systems.
• Make sure the gas valve modulates correctly in the heating and domestic hot water
production stages.
• Check correct boiler lighting by performing various tests, turning it on and off with
the room thermostat or remote control.
• Make sure the fuel consumption indicated on the meter matches that given in the
technical data table in cap. 5.
• Make sure that with no demand for heating, the burner lights correctly on opening a
hot water tap. Check that in heating mode, on opening a hot water tap, the heating
circulating pump stops and there is regular production of hot water.
• Make sure the parameters are programmed correctly and carry out any required
customisation (compensation curve, power, temperatures, etc.).
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 terminal and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. Do not use chemical
products or wire brushes for cleaning.
• The electrode must be free of scale and properly positioned.
• The gas and water systems must be tight.
• The water pressure in the system when cold must be approx. 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 match 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 indicated by the operation LEDs.
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.
cod. 3540S920 - 05/2009 (Rev. 00)
Supplied By www.heating spares.co Tel. 0161 620 6677
Table of faults
Table. 5 - Fault list
Fault
Fault
code
A01 No burner ignition
Flame present signal with burner
A02
off
Overtemperature protection activa-
A03
tion
Air pressure switch (fails to close
contacts within 20 sec. of fan acti-
vation)
F05
Air pressure switch (fails to close
contacts within 20 sec. of fan acti-
vation) due to activation of the
fume thermostat
A06 No flame after the ignition stage
F10 Delivery sensor 1 fault
F11 DHW sensor fault
F14 Delivery sensor 2 fault
Air pressure switch (fails to close
A15 contacts within 20 sec. of fan acti-
vation)
F34 Supply voltage under 170V.
F35 Faulty mains frequency
F37 Incorrect system water pressure
A41 Sensor positioning
F42 Heating sensor fault
F43 Exchanger protection activation.
F50 Modureg fault
Possible cause Cure
Excessive condensate
Empty / clean the trap
level
Check the regular gas flow to the boiler
No gas and that the air has been eliminated
from the pipes
Check the wiring of the electrode and
Ignition/detection elec-
that it is correctly positioned and free of
trode fault
any deposits
Check the gas valve and replace it if
Faulty gas valve
necessary
Electrode fault Check the ionisation electrode wiring
Card fault Check the card
Heating sensor dam- Check the correct positioning and oper-
aged ation of the heating sensor
No water circulation in
Check the circulating pump
the system
Air in the system Vent the system
Air pressure switch Check the pressure switch / Fan / Fan
contact open socket
Incorrect air pressure
Check the wiring
switch wiring
Wrong baffle Check correct Ø
Flue obstructed or not Check the length of the flues / Clean the
correctly sized flues
Exchangers dirty
(clogged on water
Clean the exchangers
side)
Faulty water circulation
Low pressure in the
Check the gas pressure
gas system
Burner minimum pres-
Check the gas pressures
sure setting
Sensor damaged
Wiring shorted Check the wiring or replace the sensor
Wiring disconnected
Sensor damaged
Wiring shorted Check the wiring or replace the sensor
Wiring disconnected
Sensor damaged
Wiring shorted Check the wiring or replace the sensor
Wiring disconnected
Fault F05 generated 5
times in the last 24 See fault F05
hours
Electric mains trouble Check the electrical system
Electric mains trouble Check the electrical system
Pressure too low Fill the system
Water pressure switch
damaged or not con- Check the sensor
nected
Delivery sensor or
Check the correct positioning and oper-
DHW sensor detached
ation of the sensors
from the pipe
Sensor damaged Replace the sensor
No system H O circu-
2
Check the circulating pump
lation
Air in the system Vent the system
Wiring disconnected Check the wiring / Gas valve
EN
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