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9
MAINTENANCE
9.1 Warnings
The operations described in this
chapter must only be performed by
professionally qualified personnel,
therefore you are advised to con-
tact an Authorised Service Centre.
For efficient and continuous operation, the
user must have maintenance and cleaning car-
ried out once a year by an Authorised Service
Centre technician. If these operations are not
carried out, damage to components and boiler
operation problems will not be covered by the
conventional warranty.
Before performing any cleaning or mainte-
nance operation or before opening or remov-
ing the boiler panels, isolate the unit from the
electric power supply using the bipolar switch
installed on the plant and close the gas cock.
9.2 Programming the maintenance
period
• Enter "programming mode" by pressing keys
15 - 16 - 17 (Figure 9.1) together for 10 sec-
onds until the LCD display indicates the let-
ters Pr alternating with code 01, indicating
entry in "parameter 01" (Figure 9.2).
13
14
Figure 9.1
- 60 -
MAINTENANCE
17
16
15
Figure 9.2
• Scroll the various parameters using keys 16
or 17 until the LCD display indicates the let-
ters Pr, alternating with the code 28, indicat-
ing entry in "parameter 28" (Figure 9.3).
Figure 9.3
• Press keys 15 and 17 (Figure 9.1) at the same
time until the LCD display indicates the value
of parameter 28 (e.g.24 default value) (Fig-
ure 9.4).
Figure 9.4
• Pressing key 17 makes it possible to change
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