Important; Periodical Inspection; List Of Faults; Technical Data And Characteristics - Ferroli DIVAtech D KN C24 Instructions D'utilisation, D'installation Et D'entretien

DIVAtech D LN C
4.3 Maintenance

IMPORTANT

B
ALL MAINTENANCE WORK AND REPLACEMENTS MUST BE CARRIED
OUT BY SKILLED QUALIFIED PERSONNEL.
Before carrying out any operation inside the boiler, disconnect the power
and close the gas cock upstream. Otherwise there may be a danger of ex-
plosion, electric shock, suffocation or poisoning.

Periodical inspection

To ensure proper operation of the unit over time, have qualified personnel carry out a
yearly inspection, providing for the following checks:
• The control and safety devices (gas valve, flow switch, 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 to clean.
• The electrode must be properly positioned and free of deposits.
97
fig. 14 - Electrode positioning
• The gas and water systems must be tight.
• The pressure of the water 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 has 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 shutdowns (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. At this point the display will show "d4" for about
30 seconds or "d5" for about 5 minutes which indicates the waiting time after which the
boiler will resume normal operation. if the boiler fails to restart, it is necessary to eliminate
the fault.
Other faults cause temporary shutdowns (marked with the letter "F") which are automat-
ically reset as soon as the value returns within the boiler's normal working range.

List of faults

Table. 2
Fault
Fault Possible cause
code
No gas
Ignition/detection electrode fault
A01 No burner ignition
Faulty gas valve
Gas valve wiring disconnected Check the wiring
Ignition power too low
Electrode fault
Flame present signal with
A02
burner off
Card fault
Heating sensor damaged
Overtemperature protec-
A03
tion activation No water circulation in the system Check the circulating pump
Air in the system
Fume thermostat activated Fume thermostat contact open Check the thermostat
(after activation of the
Wiring disconnected
F04 fume thermostat, boiler
operation is prevented for Flue obstructed or not correctly
20 minutes) sized
Cure
Check the regular gas flow to the
boiler and that the air has been
eliminated from the pipes
Check the wiring of the electrode
and that it is correctly positioned
and free of any deposits
Check the gas valve and replace it if
necessary

5. TECHNICAL DATA AND CHARACTERISTICS

Adjust the ignition power
Table. 3- Legend, fig. 20, fig. 21 and fig. 22
Check the ionisation electrode wir-
8 DHW outlet - Ø 1/2"
ing
9 DHW inlet - Ø 1/2"
Check the card
10 System delivery - Ø 3/4"
Check the correct positioning and
11 System return - Ø 3/4"
operation of the heating sensor
14 Safety valve
22 Burner
Vent the system
27 Copper exchanger for heating and DHW
32 Heating circulating pump
Check the wiring 36 Automatic air vent
37 Cold water inlet filter
Check the flue
42 DHW temperature sensor
44 Gas valve
cod. 3541P710 - Rev. 00 - 10/2018
Fault
Fault Possible cause
code
F05 Card parameter fault Wrong card parameter setting
Low pressure in the gas system Check the gas pressure
No flame after the ignition
A06
Burner minimum pressure set-
phase
ting
F07 Card parameter fault Wrong card parameter setting
Wiring disconnected
A09 Gas valve fault
Faulty gas valve
Sensor damaged
F10 Delivery sensor 1 fault Wiring shorted
Wiring disconnected
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
Wiring disconnected
A16 Gas valve fault
Faulty gas valve
F20 Card parameter fault Wrong card parameter setting
A21 Card parameter fault Wrong card parameter setting
A23 Card parameter fault Wrong card parameter setting
A24 Card parameter fault Wrong card parameter setting
Supply voltage under
F34 Electric mains trouble
170V.
F35 Faulty mains frequency Electric mains trouble
Pressure too low
Incorrect system water
F37
Water pressure switch damaged
pressure
or not connected
Probe damaged or wiring
shorted
F39 External probe fault
Probe disconnected after acti-
vating the sliding temperature
Delivery sensor detached from
A41 Sensor positioning
the pipe
F42 Heating sensor fault Sensor damaged
No system H
F43 Exchanger protection trips.
Air in the system
Modulating Operator wiring dis-
connected
F50 Gas valve fault
Faulty gas valve
A51 Card parameter fault Wrong card parameter setting
Cure
Check the card parameter and
modify it if necessary
Check the pressures
Check the card parameter and
modify it if necessary
Check the wiring
Check the gas valve and replace it if
necessary
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring
Check the gas valve and replace it if
necessary
Check the card parameter and
modify it if necessary
Check the card parameter and
modify it if necessary
Check the card parameter and
modify it if necessary
Check the card parameter and
modify it if necessary
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace the sensor
Reconnect the external sensor or
disable the sliding temperature
Check the correct positioning and
operation of the sensor
Replace the sensor
O circulation
Check the circulating pump
2
Vent the system
Check the wiring
Check the gas valve and replace it if
necessary
Check the card parameter and
modify it if necessary
56 Expansion vessel
74 System filling faucet
78 Anti-backflow device
81 Ignition and detection electrode
95 Diverter valve
114 Water pressure switch
126 Fume thermostat
136 Flowmeter
137 Pressure sensor
194 DHW exchanger
241 Automatic bypass
278 Double sensor (Safety + heating)
EN
21