SERVICING
Mini
Installation & Servicing
41
15 Operate the boiler and close the gas inlet cock so that the
boiler goes into the safety lock---out state.
Verify the correct operation of the boiler reset button by
pressing and releasing it.
16 Open the gas inlet cock and check the boiler operates
correctly.
The replacement PCB is supplied pre---set for Natural Gas
and an anti cycling time of 3 minutes. If the installation
requires adjustment of these settings refer to frames 29 and
30 for the procedures
If required, to check the PCB is set correctly for this boiler
type the following procedure should be followed.
Boiler mode setting
17 Remove the front panel of the case.
18 Position the control knob C as in the figure below and
disconnect the C.h. temperature probe.
C
A
D
E
B
Mini C24
Mini C28
Mini C32
Mini S24
Mini S28
19 Press and hold the reset button D for about 10 seconds
until the lock---out signal lamp E blinks.
20 Connect the c.h.temperature probe.
21 Press the reset button D repeatedly (twice) until the lamps
A give the indication as follows (boiler mode).
Where:
Lamp ON
Lamp OFF
At this time it is possible to determine the current setting by
keeping the reset button D pressed for more than 5 seconds.
The lamps A will flash a number of times corresponding to the
setting as on next figure:
A
B
1 flash
for
combi models
4 flashes
for
system boilers
22 To change the setting turn the knob B to the position
shown on the previous figure. By turning the knob B the
lock---out signal lamp E blinks quickly (twice per second)
indicating that the setting as changed and must be
memorised.
23 To memorize the setting keep pressed the reset button D
for about 5 seconds until the lights A briefly blink
simultaneously.
24 Press the reset button D (once) until the lamps A give the
indication as follow:
Where:
Lamp ON
Lamp OFF
It is now possible to check the current setting by pressing
reset button D for more than 5 seconds. The three lamps A
will flash a number of times corresponding to the setting of
point 22. At this point only the right green light flashes.
A
B
25 Turn the knob B clockwise and then to minimum position.
By turning the knob B, the lock---out signal lamp E blinks
quickly (2 per second) indicating that the setting has
changed and must be memorized.
26 To memorize the setting press and hold the reset button D
for about 5 seconds until all the three lamps A briefly blink
simultaneously.
27 To reset the boiler to the normal operation turn it off and
on by the main switch and radiator temperature control C.
The boiler automatically resets to its normal operation
after 10 minutes if the above reset operation is not
performed.
SER
VI
CI
N
G
