25
ENGLISH
To open the instrument panel:
- remove the screws
C
- slide the instrument panel out and rotate it to the stop position
See Fig. 46
At the end of the operations described above, put everything back in the
reverse order.
b
The gasket
F
should always be in its original seat.
See Fig. 47
6.3 Accessing the modulation circuit board
b
First disconnect the appliance from the electrical power supply us-
ing the mains omnipolar switch.
Models 11-13
- To access the electronics of the control box, remove the casing and
turn the instrument panel
- Remove the cover to access the board.
See Fig. 48
Models 17
- To access the electronics of the control box, remove the casing and
take out the instrument panel
- remove the two screws
G
- remove the cover and access the board.
See Fig. 49
7 TROUBLESHOOTING
The appliance should be inspected by a qualified professional at least once a year to ensure it is operating correctly, prolong its life and make sure
safety is optimised. This would normally involve:
- removing any rust on the burners
- removing any build-up on the electrode
- cleaning the combustion chamber
- checking that the appliance switches on and off and operates correctly
- checking the fan is operating correctly
- checking the air pressure switch
- checking the flue gas exhaust and air intake pipes.
b
The following instructions are addressed solely to qualified technicians authorised to work on the appliance.
FAULT
CAUSE
SOLUTION
Boiler does not switch on
- No electrical supply
- Connect to the mains
- No gas feeding
- Turn the gas on
- Air in gas line
- Bleed the circuit
No spark but fan operating
- Pressure switch fault
- Replace
- Pressure switch tube not connected or cut
- Check – replace – insert
- Ignition/flame detection electrode broken
- Replace
- Electrode cable cut off
- Check – fix
- Broken electronic board
- Check – replace
Burner does not come on
- Ignition/flame detection electrode broken
- Check – replace
- Electrode cable cut off
- Check – replace
- Circuit board does not detect flame
- Check connector contacts and if necessary
replace the board
- Main solenoid valve does not open
- Check and replace if necessary
Burner does not switch off when water shut off
- Flow switch fault
- Replace
Burner flame inconsistent and appliance then
switches off
- Inlet/suction line pipe not installed correctly
- Check pipe seal