25
ENGLISH
To open the inst rume nt pa nel:
- 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 acc ess t he el ectro nics of th e con trol bo x, re move the c asing and
turn the instrument panel
- Remove the cover to access the board.
See Fig. 48
Models 17
- To acce ss th e ele ctron ics o f the cont rol b ox, r emove the c asin g and
take out the instrument panel
- remove the two screws
G
- remove the cover and access the board.
See Fig. 49
7 TROUBLESHOOTING
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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
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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
- ,JQLWLRQÀDPHGHWHFWLRQHOHFWURGHEURNHQ - Replace
- Electrode cable cut off - &KHFN±¿[
- Broken electronic board - Check – replace
Burner does not come on
- ,JQLWLRQÀDPHGHWHFWLRQHOHFWURGHEURNHQ - Check – replace
- Electrode cable cut off - Check – replace
- &LUFXLWERDUGGRHVQRWGHWHFWÀDPH
- 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
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switches off
- Inlet/suction line pipe not installed correctly - Check pipe seal