108
EN
7.3.6
Connecting the air pressure switch and siphon
The silicon tubes on the air pressure switches (1) and siphon
(2) MUST be reconnected, where it was necessary to disconnect
them, as shown in the figure:
– Outlet P1 on the air pressure switch (1) to the fan (3)
– Outlet P2 on the air pressure switch (1)and outlet P1 on the
siphon pressure switch (2) to the boiler body (4).
3
1
P1
P1
P2
P2
2
4
Fig. 43
NOTE:
Outlet P2 on the siphon pressure switch (2) remains free.
7.4
Unscheduled maintenance
If you replace the
electronic circuit board or gas valve
YOU MUST
SET THE PARAMETERS as described under "Parameter setting
7.5
Possible faults and solutions
LIST OF MALFUNCTION/FAULT ALARMS
Shown on display
Type of malfunction or
fault
Cause
Solution
Air pressure switch fault
Incorrect wiring on air pressure
switch
Tubes from air pressure switch
disconnected or damaged
Air duct clogged
Smoke duct clogged
- Check correct wiring and air pressure switch tubes
- Check that the air duct is free of obstructions
- Check that the smoke duct is free of obstructions
Low water pressure in
system (< 0,8 bar)
System pressure is lower than 0.8
bar (78 kPa) and the boiler has
stopped
- Carry out system refilling/filling until the pressure is
reset at 0,8 - 5,8 bar (80 - 568 kPa)
- If this error happens again, it is advisable to check that
the system is sealed
High water pressure in
system (> 5,8 bar)
System pressure is higher than 5.8
bar (568 kPa) and the boiler has
stopped
- Empty the system until the pressure is reset at 0,8 -
5,8 bar (80 - 568 kPa)
- Check the pressure transducer
Boiler delivery sensor fault The delivery sensor (SM) is open or
has short-circuited
- Check the sensor and its connections
No flame detection
The flame is not detected at the end
of an ignition sequence
- Check the flame detection sensor and its connections
- Check the electronic circuit board
- Ensure correct gas supply pressure
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