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DIVAPROJECT C24
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the 3 LEDS will indicate the fault code.
There are faults that cause permanent shutdown: to restore operation, press the RESET button for 1 second (ref. 5 - fig. 1) or RESET on the optional remote timer control if installed;
if the boiler fails to start, it is necessary to firstly eliminate the fault indicated in the operation LEDs.
Other faults cause temporary shutdowns which are automatically reset as soon as the value returns within the boiler's normal working range.
Table. 3 - Fault list (Key LEDs
Indications on boiler panel
Indications on Remote
Green
Yellow
Red
= Off /
= On /
= Fast flashing)
Fault
Control
A01
No burner ignition
A06
No flame after the ignition phase
A02
Flame present signal with burner off
F05
Card parameter fault
F07
Card parameter fault
Fume thermostat activation (boiler opera-
F04
tion is prevented for 20 minutes after fume
thermostat intervention)
F37
Low system pressure
F10
Delivery sensor fault
F11
DHW sensor fault
Exchanger protection intervention (the
F43
LEDs flash alternately)
Display off
Faulty card
A09
Gas valve fault
A16
Gas valve fault
F34
Supply voltage under 140VAC
F35
Faulty mains frequency
F50
Controller DBM33 fault
F51
Controller DBM33 fault
Display off
Card not electrically powered
A03
Overtemperature protection intervention
A23
Card parameter fault
A24
Card parameter fault
Possible cause
No gas
Ignition/detection electrode fault
Faulty gas valve
Ignition power too low
Low pressure in the gas system
Burner minimum pressure setting
Electrode fault
Card fault
Wrong card parameter setting
Wrong card parameter setting
Fume thermostat contact open
Wiring disconnected
Flue not correctly sized or obstructed
System empty
Water pressure switch damaged or not connected
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
No system H
O circulation
2
Air in the system
Card failure
Wiring disconnected
Faulty gas valve
Wiring disconnected
Faulty gas valve
Electric mains trouble
Electric mains trouble
Controller DBM33 internal error
Controller DBM33 internal error
No power
Blown fuses
Heating sensor damaged
No water circulation in the system
Air in the system
Safety thermostat intervention
Wrong card parameter setting
Wrong card parameter setting
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
Adjust the ignition power
Check the gas pressure
Check the gas pressures
Check the ionisation electrode wiring
Check the card
Check the card parameter and modify it if necessary
Check the card parameter and modify it if necessary
Check the thermostat
Check the wiring
Change the flue
Fill the system
Check the sensor
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the circulating pump
Vent the system
Replace the card
Check the wiring
Check the gas valve and replace it if necessary
Check the wiring
Check the gas valve and replace it if necessary
Check the electrical system
Check the electrical system
Check the earth connection and replace the controller if necessary.
Check the earth connection and replace the controller if necessary.
Check the power supply
Replace fuses
Check the correct positioning and operation of the heating sensor
Check the circulating pump
Vent the system
Check safety thermostat operation
Check the card parameter and modify it if necessary
Check the card parameter and modify it if necessary
EN
37
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