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20023224
GB
Maintenance
Flame inspection window
Clean the glass whenever necessary (Fig. 28).
Flexible hoses
Check to make sure that the flexible hoses are still in good con-
dition and that they are not crushed or otherwise deformed.
Fuel tank
Approximately every 5 years, or whenever necessary, suck any
water or other impurities present on the bottom of the tank using
a separate pump.
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially the flue gas temperature and combustion cham-
ber pressure.
Lastly, check the condition of the flue gas stack.
Fuel pump and/or couplings replacement
In conformity with Fig. 29.
7.3
Burner start-up cycle diagnostics
During start-up, indication is according to the followin table:
7.4
Resetting the control box and using diagnostics
The control box features a diagnostics function through which
any causes of malfunctioning are easily identified (indicator:
RED LED).
To use this function, you must wait at least 10 seconds once it
has entered the safety condition (lock-out), and then press
the reset button.
The control box generates a sequence of pulses (1 second
apart), which is repeated at constant 3-second intervals.
Once you have seen how many times the light pulses and
identified the possible cause, the system must be reset by
holding the button down for between 1 and 3 seconds.
The methods that can be used to reset the control box and use
diagnostics are given below.
Fig. 28
D484
Fig. 29
D1108
Colour code table
Sequences
Colour code
Pre-purging
Ignition phase
Operation, flame ok
Operating with weak flame signal
Electrical supply lower than ~ 170V
Lock-out
Extraneous light
Legend:
off
Yellow
Green
Red
RED LED on
wait at least 10s
Lock-out
Press reset
for > 3s
Pulses
Interval
3s
Pulses