Biasi ADVANCE 15OV User manual

Service manual
Wall hung, fanflue, roomsealed, high efficiency open vent gas boiler
Service manual
ADVANCE
Models G.C. Appl. No.
ADVANCE 15OV 41-583-35 BOILER
ADVANCE 18OV 41-583-36 BOILER
ADVANCE 24OV 41-583-37 BOILER
Leave this manual adjacent to the gas meter
Warning:
Service / repairs must be carried out, only by a qualified Gas Safe Registered
Engineer, who will be responsible for the current Regulations for gas
appliances.
Note:
After servicing, complete the relevant Service Interval Record section of the
Benchmark Checklist of the user and installation manual.

TABLE OF CONTENTS
- 2 -
1 OVERALL INFORMATION..........................3
1.1 Overall View .....................................3
1.2 Hydraulic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 GENERAL ACCESS AND EMPTYING HYDRAULIC
CIRCUITS.......................................4
2.1 Nomenclature ....................................4
2.2 Case panels......................................4
2.3 Control panel .....................................5
2.4 Main electronic p.c.b. box ...........................5
2.5 Emptying the primary circuit .........................6
3 DIAGRAMS .....................................7
3.1 Wiring diagram ...................................7
3.2 Circuit voltages ...................................8
4 FAULT FINDING..................................9
4.1 Display diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Programming the maintenance period ................11
5 CONDENSING HEAT EXCHANGER.................12
5.1 Function........................................12
5.2 Removal .......................................12
5.3 Cleaning .......................................13
6 MAIN ELECTRONIC CONTROL/IGNITION P.C.B. ......14
6.1 Function........................................14
6.2 Selection and adjustment devices....................14
6.3 Checking the temperature ..........................15
6.4 Setting the boiler control function modes ..............15
6.5 Checks.........................................17
6.6 Removal of the electronic control p.c.b ................17
6.7 Thermal control in the mode .....................19
7 CONTROL PANEL ELECTRONIC P.C.B. .............20
7.1 Function........................................20
7.2 Normally information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.3 Info modality ....................................21
7.4 Function modes setting modality.....................21
7.5 Removal of the control panel electronic p.c.b . . . . . . . . . . . 21
8 GAS VALVE ....................................22
8.1 Function........................................22
8.2 Description of the parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
8.3 Adjustment......................................22
8.4 Checks.........................................24
8.5 Removal of the gas valve ..........................24
9 TEMPERATURE PROBE ..........................25
9.1 Function........................................25
9.2 Checks.........................................25
9.3 RemovaloftheC.H.owtemperatureprobe ...........25
9.4 Removal of the C.H. return temperature probe ..........25
10 FAN AND AIR BOX ..............................27
10.1 Function........................................27
10.2 Removal of the Air box and the Fan ..................27
11 IGNITION, DETECTION ELECTRODES AND BURNER .28
11.1 Function........................................28
11.2 Removal of the Ignition and detection electrodes . . . . . . . . 28
11.3 Removal of the air-gas duct gasket...................28
11.4 Removal of the front insulation panel .................28
11.5 Removal of the burner.............................29
11.6 Removal of the rear insulation.......................29
11.7 Checks.........................................30
12 SAFETY THERMOSTAT ..........................31
12.1 Function........................................31
12.2 Checks.........................................31
12.3 Removal .......................................31
13 FLUE TEMPERATURE PROBE NTC AND SAFETY
THERMAL FUSE ................................32
13.1 Function........................................32
13.2 Removal .......................................32
13.3 Checks.........................................32
14 CONDENSATE TRAP ............................34
14.1 Function........................................34
14.2 Check the cleanness of the trap .....................34
14.3 Removal .......................................34
15 SHORT SPARE PARTS LIST ......................35

- 3 -
OVERALL INFORMATION
1 OVERALL INFORMATION
1.1 Overall View
Figure 1.1
Condensing
heat exchanger
Flue temperature
probe NTC and
Safety thermal fuse
Detection
electrode
C.H. flow temp.
probe NTC
Safety thermostat
Burner
Fan
Electronic controlbox
Gas restrictor
Gas valve
Pipe silencer
Air/gas mixer
C.H. return temp.
probe NTC
Ighition
electrodes
Condensate
trap
Main circuit
drain valve
1.2 Hydraulic diagram
Figure 1.2
Central heating (C.H.) operation
C.H. waterretur
n
C.H. waterflow

- 4 -
GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
2 GENERAL ACCESS AND EMPTYING
HYDRAULIC CIRCUITS
2.1 Nomenclature
Figure 2.1
1
2
3
4
5
1 Right side panel
2 Front panel
3 Control panel
4 Main electronic p.c.b. box
5 Left side panel
Warning: open vent boilers can utilize extensive ex-
ternal controls and equipment that can have an ef-
fect on the correct operation of the boiler, under
dysfunctional operation conditions it is advised
that you safely disconnect any and all external
equipment to identify if the boiler or external equip-
ment is causing the issue. the boiler can be operat-
ed with any external zone valves in the manually
locked open condition and with the room thermo-
stat link replaced to prove correct operation of the
boiler. Please take care to safely terminate any re-
moved wiring during this test.
2.2 Case panels
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
For the most part of the check and maintenance operations it is
necessary to remove one or more panels of the case.
The side panels can be removed only after the removal of the
front panel.
To remove the front panel loosen screws "A" (Figure 2.2), lift the
panel and remove it.
Figure 2.2 - Bottom view of the boiler
A
B
B
Pull the lower part of the front panel and lift it upwards (Figure
2.3).
Figure 2.3
C
C
To remove the side panels loosen the screws "B" (Figure 2.2)
and "C" (Figure 2.3).
Pull the side panels towards the outside.
To Fit the case panels
Fit the side case panels.
Warning: Fit the front panel hooking it on the upper
side.
Push the spring towards the internal side of the boiler and simul-
taneously push the front case panel until it is completely hold in
place (Figure 2.4 step 1, 2).
Repeat the same operation on the opposite side of the front pan-
el (Figure 2.4 step 3, 4).
Ensurethatthefrontpaneledgeisclose-ttingtothesidepanels.
Lock in place the panel with the appropriate screws.

- 5 -
GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
Figure 2.4
2.3 Control panel
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
To gain access to the parts located inside the control panel pro-
ceed as follows:
1 Remove the front panel of the case
2 Unscrew the screw "D" (Figure 2.5).
3 Free the hooks indicated and rotate the lid towards left.
Figure 2.5
D
4 To access to the parts located behind the control panel to free
the hook "E" and turn it as shown in Figure 2.6.
Figure 2.6
E
2.4 Main electronic p.c.b. box
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
To gain access to the parts located into main electronic p.c.b. box
proceed as follows:
1 Remove the front panel of the case.
Terminal block lid removal
2 To remove the terminal block lid "F" (Figure 2.7), free the front
hooks.
Figure 2.7
F
3 Slightly rotate the lid as indicated by the curved arrow and
free the rear hooks.
4 Remove the lid.

- 6 -
GENERAL ACCESS AND EMPTYING HYDRAULIC CIRCUITS
Main electronic p.c.b. lid removal
To get access to the main electronic p.c.b.:
5 Pull the box that contains the electronic p.c.b. and rotate it
(Figure 2.8).
Figure 2.8
6 Remove the terminal block lid "F" (Figure 2.7).
7 Free the hooks placed on the three sides indicated and rotate
the lid towards left (Figure 2.9).
Figure 2.9
2.5 Emptying the primary circuit
1 IsolatethecoldfeedtotheF&Etank,alsoifttedisolatethe
heatingcircuitowandreturnvalves.
2 Remove the front and right panels of the boiler.
3 Loosen the central heating drain cock "G" (Figure 2.10) until
the boiler is completely emptied.
Figure 2.10
OPEN
CLOSED
G

- 7 -
DIAGRAMS
3 DIAGRAMS
3.1 Wiring diagram
Figure 3.1
bu
rd
1
2
3
L
N
1
3
4
M
~
Room thermostat
Pump
terminal block
Electric supply
terminal block
Gasvalve
External temp.
Remote
Fan
Ignition
electrodes
probe
bu
bn
bu
bn
gnye
bu
bn
bk
bk
rd
rd
bu
gnye
bn
ye
or
ye
gy
bk
bu
rd rd
bu
bk
bu
bn
gnye
gnye
bu
bn
bu
bn =brown
bu =blue
bk =black
wh =white
rd =red
gy =grey
gn =green
ye =yellow
vt =violet
og =orange
gnye =green/yellow
rdwh =red/white
terminal block
Fuse 2AF250VAC
5x20
wh
wh
wh
wh
gy
wh
wh
t
bk
bk
bk
bk
bk
bk
rd
bu
bu
bu
bu
rd
bk
bk
C.H. temperature
probeNTC
flow
Safety
thermostat
Safety
Flue temp.
probeNTC
thermalfuse
tt
4
3
2
1
bu
bu
bu rd
bu
rd
wh
t
wh
wh
wh
wh
wh
Flamedetection
electrode
C.H. temperature
probeNTC
return
or
Time switch (option)

- 8 -
DIAGRAMS
3.2 Circuit voltages
Figure 3.2
Electrical voltages with burner on only during C.H. operation
230~
230~
Safety
thermostat
1
FanSupply network
230~
C.H. external
pump
230~
Gasvalve

- 9 -
FAULT FINDING
4 FAULT FINDING
FAULT FINDING
Components to check
Section of the manual  (note ref. in brackets)
–
(1)
–
(2)
–
(3)
14.1 –
(4)
5 – 6.5 7 8.4 9.2 10 11.4 12.2 12.2 13.1 –
(7)
––––
Appliance lock–out (*)
Defect 
Power supply line
Gas supply line
Flue pipes
Cond. drain pipe and trap
C.H. circuit
Condensing heat exchanger
External pump
Fuses (Electronic p.c.b.)
Main electronic p.c.b.
Boiler settings
Control panel electr. p.c.b.
Gas valve
C.H.owtemp.probe
C.H. return temp. probe
Fan / air restrictor
Ignition electrode
Detection electrode
Safety thermostat
Gas restrictor
Flue temp. probe NTC
Expansion vessel external
Safety valve external
Pressure gauge external
External temp. probe
Room themostat delayed
Display indicates ”Er”
Er 01 + A B D C
Er 02 + C B
Er 03 + A
Er 04 + B A
Er 05 + A
Er 06 + A A
Er 08 + A
Er 09 + A B
Er 10 + A B
A C B
Er 14 + A C B
Er 15 + A C B Er 16 + A A
Er 17 + A A Er 18 + B D C A
L3 B D C A A TD B B A
The letter in the cells indicates the possible fault cause. A.....Z indicates the most probably (A) to less probably (....Z)

- 10 -
FAULT FINDING
Components to check
Section of the manual  (note ref. in brackets)
–
(1)
–
(2)
–
(3)
14.1 –
(4)
5 – 6.5 7 8.4 9.2 10 11.4 12.2 12.2 13.1 –
(7)
––––
Appliance lock–out (*)
Defect 
Power supply line
Gas supply line
Flue pipes
Cond. drain pipe and trap
C.H. circuit
Condensing heat exchanger
External pump
Fuses (Electronic p.c.b.)
Main electronic p.c.b.
Boiler settings
Control panel electr. p.c.b.
Gas valve
C.H.owtemp.probe
C.H. return temp. probe
Fan / air restrictor
Ignition electrode
Detection electrode
Safety thermostat
Gas restrictor
Flue temp. probe NTC
Expansion vessel external
Safety valve external
Pressure gauge external
External temp. probe
Room themostat delayed
No ”Er” indication on display
The boiler does not start. The control panel display OFF Fan still. • • • • Incorrect modulation. • • • • Noisy boiler. •• • ••••
–
Water leaks from the safety valve during operation on C.H. • ••••
–
Water leaks from the safety valve when the boiler is off. •••
FAULT FINDING
* Lock out is indicated as “Er” on the display. Note Useful information can be obtained also from the optical indication given by the appliance display (see section 4.1). 1 Check for 230V~ between line (L) and neutral (N). Verify the integrity of supply cable, plug and external
fuses.
Check the polarity of line and neutral connection.
2 Check the gas supply pipe and isolation tap for gas
tightness.
3 Check for soundness and absence of obstructions. Verify
thattheueterminaliscorrectlyinstalled(seeclearances)
and ensure that exhaust gas is not sucked back by the boiler.
4 Check for soundness of the circuit and verify its correct
lling(seealsoinstallationmanual).
5 A jammed by–pass could cause the over–heating of the
main circuit and the intervention of the safety thermostat.
6 Usingtheueanalyser,checktheCO2valueoftheue
gases.
This reading is a reference value for the gas valve
setting.
7 Check the pressurization of the expansion vessel.
Refer to the installation manual for proper values.
9 The boiler doesn’t reach the nominal heat input.

- 11 -
FAULT FINDING
4.1 Display diagnostic
Thedisplayindicationsprovidehelpinthediagnosisoffaultnd-
ing.
The control panel display gives other information for the user.
The following table gives fault code, error and the reson for the
fault.
Er 01 + RESET Lack of burner ignition
Er 02 + RESET Safety thermostat lockout
Er 03 + RESET Other faults
Er 04 + Faulty primary circuit (no water or absence
ofow)
Er 05 + Faulty fan control system
Er 06 + FaultyC.H.temperatureprobeNTCow
Er 08 + FaultyexternaltemperatureprobeNTC(ift-
ted)
Er 09 + FaultyuetemperatureprobeNTC
Er 10 + RESET Lockout–uetemperatureprobeNTC(Flue
temperature > 120 °C)
An 11 Parasiteame
Er 12 + Faulty central heating temp. probe NTC (re-
turn)
Er 14 + RESET Faulty pump (absence of water ow in the
main circuit) or primary temperature above
105 °C
Er 15 + RESET None or too low water ow; Faulty pump
(temp. difference between probes higher
than 35° C)
Er 16 + RESET Possible exchange of NTC probes (Flow or
Return) or pump wrongly mounted (upside –
down)
Er 17 + RESET Faulty C.H temperature probe NTC (Flow or
Return)
Er 18 + RESET Faulty primary circuit (no water or absence
ofow)
Er 25 + RESET Flame detection error
Er 69 Wiring error lockout
L3 Useful output limitation (temperature differ-
ence between probes higher than 25° C):
Boiler test performing
Td Thermostat Delayed: Boiler test performing
Maintenance required
Thewrenchsymbolisashing(withoutshow-
ing any error)
4.2 Programming the maintenance period
1 To enter in the parameters setting mode press sequentially
the 3 keys "B - C - A" (Figure 4.1) and hold in for 10 second
until the display shows Figure 4.2.
Figure 4.1
A
B
C
Figure 4.2
2 Scroll the various parameters using keys "A" or "C" (Figure
4.1) until the LCD display indicates the letters Pr, alternating
with the code 28, indicating entry in “parameter 28" (Figure
4.3).
Figure 4.3
3 Press keys "B" and "A" (Figure 4.1) at the same time until
the LCD display indicates the value of parameter 28 (e.g.12
default value) Figure 4.4.
Figure 4.4
4 Pressing key "A" makes it possible to change the value of
parameter 28 from 0to 48 months. It is possible to set pa-
rameter 28 to 99 thereby disabling the maintenance request
(symbol will disappear from the display).
5 Bypressingkey"B"(Figure4.1)conrmationoftheinserted
value is obtained.
6 By pressing keys "B" and "C" (Figure 4.1) together, you will
exit without changing the value (return to parameter list Fig-
ure 4.3).
7 Press keys "B - C - A" (Figure 4.1) together for 10 seconds to
exit "programming mode".

- 12 -
CONDENSING HEAT EXCHANGER
5 CONDENSING HEAT EXCHANGER
5.1 Function
The Condensing heat exchanger "A" in Figure 5.1 has the func-
tion of transferring heat produced from combustion of the gas
andfromtheueexhaustedgastothewatercirculatinginit.
Figure 5.1
A
B
C
By reducing the combustion products temperature, the latent
heat of the vapour is transferred to the water circuit, allowing an
extra gain of useful heat.
The condensed vapour is then drained through the condensate
trap "C" and the draining pipe "B".
5.2 Removal
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
1 Disconnecttheuesystemfromtheboiler.
2 Remove the fan group (rubber pipe, gas pipe) following the
instructions from 1 to 6 in section "10.2 Removal of the Air
box and the Fan" on page 27.
3 Disconnect the detection electrode connector "D", the ignition
electrodes connector "E" and the earth wire "F".
4 Disconnect the fan connector "G" by pressing the plastic
hook placed on the side of the connector (Figure 5.2).
5 Unscrew the nuts "H" (Figure 5.2).
6 Remove the fan-burner group "I".
7 Empty the primary circuit of the boiler.
8 Remove the clips "J" (Figure 5.2).
9 Loosen the connection "L" and slightly move the pipe "K" up-
wards, turn it towards left (Figure 5.2) and then move the pipe
downwards freeing it from the Condensing heat exchanger.
10 Loosen the connection "M" and slightly move the pipe "N" up-
wards, turn it towards left (Figure 5.2) and then move the pipe
downwards freeing it from the Condensing heat exchanger.
Figure 5.2
D
E
F
G
H
I
J
K
L
M
N
Figure 5.3
O
P
11 Unscrew the screws "O" and remove the clamps (Figure 5.3).
12 Disconnect the connector "P" by pressing the plastic hook
placed on the side of the connector (Figure 5.3).
13 Remove the Condensing heat exchanger by levering it and
sliding it forwards.

- 13 -
CONDENSING HEAT EXCHANGER
14 Reassemble the Condensing heat exchanger carrying out
the removal operations in reverse order.
Ensure to tighten the nuts "H" - Figure 5.2 rmly.
5.3 Cleaning
If there are deposits of dirt on the coil of the Condensing heat
exchanger, clean with a bristle paintbrush and remove the dust
with a hoover.
Warning: After cleaning or replacement as detailed
above, it is deemed necessary to undertake a com-
bustion analysis as detailed in chapter "8.3 Adjust-
ment" on page 22 section "8 GAS VALVE" on
page 22.
Figure 5.4
Q
Caution:
After any periodical servicing or disturbance the combustion
chamber silicon seal "Q" Figure 5.4 and the Air-gas duct gasket
(Figure 5.5) must be fully inspected and replaced at the discre-
tion of the service engineer.
After any disturbance to the chamber door seal the appliance
must undergo a full analytical combustion performance check.
Remove any limescale from the detection electrode
and replace it if worn.
Figure 5.5

- 14 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
6 MAIN ELECTRONIC CONTROL/IGNITION
P.C.B.
6.1 Function
Figure 6.1
From otherboilerdevices....
C.H. flow temperature probe NTC
C.H. return temperature probe NTC
Flue temperatureprobe NTC
Safety thermostat
Flamedetection electrode
Room thermostat (iffitted)
Time switch (iffitted)
On theMain electronic control/ignition
p.c.b. ......
Function control
C.H. temperatureadjustment
Boiler resetbutton
(printed circuit boardp.c.b.)
InletInformation
External Pump
Gasvalve
Fan
Ignition electrodes
Displayindicates “Er”*
*control panelelectronicp.c.b.
Outlet command
The fundamental function of the Main electronic control/ignition
p.c.b. is that of controlling the boiler in relation to the external
needs (i.e. heating the dwelling) and operating in order to keep
the temperature of the hydraulic circuits constant.
This is obviously possible within the useful power and maximum
working temperature limits foreseen.
Generally, the Main electronic control/ignition p.c.b. receives in-
let information coming from the boiler (the sensors) or from the
outside (printed circuit board p.c.b., room thermostat, etc.), pro-
cesses it and consequently acts with outlet commands on other
components of the boiler (Figure 6.1).
The Main electronic control/ignition p.c.b. is also a full sequence
ignition device and does a sequence of operations (ignition cy-
cle) which lead to the ignition of the gas at the burner.
Itchecksthe presence of the ame duringtheentireperiodin
which it is activated and supplies the fan regulating its speed.
The Main electronic control/ignition p.c.b. has a safety function
and any incorrect interventions or tampering can result in condi-
tions of dangerous functioning of the boiler.
The Main electronic control/ignition p.c.b. can lock the function-
ing of the boiler (lock state) and stop its functioning up to the
resetting intervention. The lock-out is signalled on the display of
the printed circuit board p.c.b. and can be reset only by using the
boiler reset button placed on the control panel electronic p.c.b.
(see section "7.1 Function" on page 20).
Some components which are connected to the device can acti-
vate the lock state. The causes of a lock state could be:
• The intervention of the safety thermostat (overheat of the pri-
mary circuit).
• Theinterventionoftheuetemperatureprobe(overheatofthe
combustion products).
• A fault on gas supply.
• Faulty ignition (faulty ignition electrodes, their wiring or con-
nection).
• Faultyamedetection(faultydetectionelectrode,itswiringor
connection).
• Faulty condensate drainage.
• Faulty gas valve (faulty on-off operators or not electrically sup-
plied).
• Faulty Main electronic control/ignition p.c.b..
• Absenceofwaterorinsufcientowrateintheprimarycircuit.
Figure 6.12 show the sequence of the operations that are car-
ried out at the start of every ignition cycle and during normal
functioning.
6.2 Selection and adjustment devices
On the Main electronic control/ignition p.c.b. several selection,
adjustment and protection devices are located. (Figure 6.2).
Some of these devices are directly accessible by the user (func-
tion control, temperature adjustment etc.) others, like the fuses,
are accessible by removing the main electronic p.c.b. lid.

- 15 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
Figure 6.2
1 2 3 5
6
4
7
8
910
11
12
13
1 Connector - ignition electrode.
2 Connector- amedetectionelectrode
3 Connector - controller fan
4 Connector - C.H. return temperature probe NTC
5 Connector- uetemperatureprobeNTC
6 Connector - external temperature probe (optional)
7 Connector- safety thermostat and C.H. ow temperature
probe NTC
8 Connector - remote control (optional)
9 Connector - display and function control / C.H. temperature
adjustment control panel p.c.b.
10 Fuse F1, F2 2A F
11 Connector - electric supply Main electronic control/ignition
p.c.b.
12 Connector - electric supply control panel p.c.b.
13 Connector - gas valve, external pump and fan
6.3 Checking the temperature
The Main electronic control/ignition p.c.b. makes it possible to
separatelyadjusttheC.H.waterowtemperature.
The temperature of the water is converted into an electric signal
by means of temperature probes.
The user, setting the desired temperature with the control panel
p.c.b. key .
If the power requested is lower than 40% of the maximum power
output then control is achieved by switching ON the burner at
minimum power, then switching OFF (ON/OFF function). If the
power requested is higher, then the burner is switched ON at
maximum power and will control by modulating to 40% of the
maximum power output.
During the C.H. operation (Figure 6.3), the signal coming from
the C.H. temperature probe is compared to the signal given by
the control panel through the adjustment made by the user (key
). The result of such a comparison operates the fan
speedthusregulatingthegasowrateandconsequentlychang-
ing the useful output of the boiler.
Figure 6.3
The control sequences in function in function are illustrated
in detail in sections "6.7 Thermal control in the mode" on
page 19.
6.4 Setting the boiler control function modes
It is possible to select the various boiler control function modes
hereafter named “parameters” by using the keys of the control
panel p.c.b.
Figure 6.4
A
B
C
1 To enter in the parameters setting mode press sequentially
the 3 keys "B - C - A" (Figure 6.4) and hold in for 10 second
until the display shows Figure 6.5.
Figure 6.5

- 16 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
2 To move through the parameters press C.H. set keys ("A" or
"C" Figure 6.6).
Figure 6.6
A
C
3 The display shows Figure 6.7.
Warning: You must wait for a period of at least 8
seconds after you have stored your last P.C.B. ad-
justment before you turn the boiler off or exit the
setting mode using the same 3 keys you used to
enter the mode as described above.
Figure 6.7
4 To modify the parameter press contemporary the keys ("A -
B" Figure 6.8).
Figure 6.8
A
B
5 To change the parameters press C.H. set keys ("A" or "C"
Figure 6.6).
6 To memorize the setting press the key ("B" Figure 6.9).
Figure 6.9
B
7 To exit for setting without modifying the set press the keys
("B - C" Figure 6.10).
Figure 6.10
B
C
To reset the boiler to the normal operation press contemporary
the 3 keys ("A - B - C" Figure 6.4) for 10 second.
The following table gives details of each parameter and the pos-
sible value that can be set.
Important: at the end of the setting operation it is important
to ll/update the table in the installation manual see chapter
COMMISSIONING section: Setting record.
PARAMETER DIGIT VALUES
Boiler type (to be
updated with the
complete range)
Pr 01 00 = No power Er 99
15 = ADVANCE 15OV
18 = ADVANCE 18OV
29 = ADVANCE 24OV
Not used Pr 02
Pump speed Pr 03 00 =
(2) Max
factory set
01 =
(1) Med
02 =
Self regulat
Zone valve setting
Room Thermostat /
Remote Control
Pr 04 00 = No (factory set)
01 = Z1 with R.T., Z2
withR.C.,Max.C.H.ow
temperature
02 = Z1 with R.T., Z2
withR.C.,Min.C.H.ow
temperature
03 = Z1 with R.T., Z2 with
three way diverter valve
04 = Safety low voltage R.T.
Gas type Pr 05 00 = G20 Natural
01 = G25
02 = --- --- --- ---
03 = --- --- --- ---
04 = G30 Butane
05 = G31 Propane
Not used Pr 06
C.H.owmax
temperature °C
Pr 07 85÷45 (factory set 80 °C)
Factory parameters
reset
Pr 08 00 = No reset
04 = All parameters return to
factory set with the exclusion
of Pr 01 and Pr 05
39 = All parameters return
to factory set included Pr 01
and Pr 05

- 17 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
PARAMETER DIGIT VALUES
Chimney sweep
function
Pr 09 00 = No chimney sweep fun
(factory set)
01 = D.H.W. low power
sweep---test
02 = C.H. low power sweep-
--test
03 = C.H. max power
sweep---test
04 = D.H.W. max power
sweep---test
C.H. reignition
frequency
Pr 10 00÷99 (0÷600 sec.)
(factory set 30 = 3 minutes)
C.H. pump post-
circulation
Pr 11 00÷99 (0÷600 sec.)
(factory set 10 = 1 minute)
Max. useful output in
C.H. mode
Pr 12 00÷99 (0÷100%)
C.H. pump working type Pr 13 00 = Depends on room
thermostat (factory set)
04 = Always running
Ignition power Pr 14 00÷99 (0÷100%)
factory set:
Natural gas (G20)
70 = ADVANCE 15OV
51 = ADVANCE 18OV
58 = ADVANCE 24OV
Propane (G31)
70 = ADVANCE 15OV
51 = ADVANCE 18OV
58 = ADVANCE 24OV
K value (external probe
diagram)
Pr 15 01 (=0,1) ÷ 60 (=6,0)
K value factory set:
00 = OFF
Min. re-ignition power Pr 16 00 ÷ 99 (0%÷100 %)
(factory set 00 = 0%)
Not used Pr 17
NTC on the C.H. return Pr 18 00 = Probe not present
01 = Probe present
(factory set)
LCD type Pr 19 00 = TOP
02 = MEDIUM (factory set)
Not used Pr 20
Not used Pr 21
Not used Pr 22
Not used Pr 23
Duty Cycle Zone,
Only if Pr 04 = 01 or
02 and contemporary
requests from Z1 and
Z2
Pr 24 10÷30 (0÷30 min.)
(factory set 30 = 30 minute)
C.H.owtemperature
in antifreeze protection
mode °C
Pr 25 25÷85 (factory set 45 °C)
Not used Pr 26
C.H. minimum setpoint Pr 27 25÷45 (factory set 25 °C)
Maintenance intervals Pr 28 00 ÷ 48 (= months)
(factory set 12 months)
Presence of domestic
cold water temp.
probe or set of inlet cold
water with solar control
Pr 29 00 = No NTC probe (factory
set)
01 = Yes NTC probe
04 ÷ 45 (°C) temp.
NTC inlet probe with solar
control
PARAMETER DIGIT VALUES
Not used Pr 30
C.H. temperature rising
rate (gradient).
Pr 31 00÷99 (0÷600 sec.)
(factory set 10 = 60 sec.)
Min. useful output C.H.
or D.H.W.
Pr 32 00÷99 (0%÷100%)
(factory set 00 = 0%)
Tab 9.1
6.5 Checks
Check that the fuses are complete
If the Main electronic control/ignition p.c.b. does not supply any
device (external pump, fan, etc.) check that the fuses 10 (Figure
6.2) are complete.
If a fuse has blown replace it with one that has the same charac-
teristicsafterhavingidentiedthereasonforfailure.
Lock sequence
Start the boiler until the burner is ignited.
Withtheburnerring, interrupt the gas supply.TheMainelec-
tronic control/ignition p.c.b. must carry out four complete ignition
cycles and then, after about 4 minutes, goes to lock-out state.
Switch off and on the electricity supply to the boiler, by means of
the fused spur isolation switch, the device must not unlock and
the burner must not turn on.
6.6 Removal of the electronic control p.c.b
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
When replacing the Main electronic control/ignition p.c.b.
all parameters must be correctly checked / adjusted accord-
ingly with the values noted in table in the installation manual
see chapter COMMISSIONING section: Setting record (for
information on parameters see also section "6.4 Setting the
boiler control function modes" on page 15).
1 Remove all the body panels (see section "2.2 Case panels"
on page 4).
2 Gain access to the parts located inside the Main electronic
p.c.b. box as explained in the section "2.4 Main electronic
p.c.b. box" on page 5 of this manual.
3 Remove all the wiring connected to the Main electronic con-
trol/ignition p.c.b.
4 Delicatelyexthehooks"D"inthedirectionsindicated(Fig-
ure 6.11) in order to release the circuit from the box.
5 Remove the Main electronic control/ignition p.c.b.

- 18 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
Figure 6.11
D
6 Re-assemble the Main electronic control/ignition p.c.b. fol-
lowing the removal procedures in the reverse order.
Important
When re-assembling the Main electronic control/ignition p.c.b.:
7 It is not necessary to utilise static protections but it is advis-
able to ensure that the p.c.b. is handled with care and held at
the edges and with clean dry hands.
Attention
After installing the Main electronic control/ignition p.c.b. properly
set the parameters.
Warning: After cleaning or replacement as detailed
above, it is deemed necessary to undertake a com-
bustion analysis as detailed in section "8.3 Adjust-
ment" on page 22.

- 19 -
MAIN ELECTRONIC CONTROL/IGNITION P.C.B.
6.7 Thermal control in the mode
Figure 6.12
YES
lockmemorised?
NO
Switch in thefunctionmode
Ta king
waterfromthe domestic hot
watercircuit?
YEScirculator off
fanstill
circulator on
Is primarycircuit
temperaturehigherthan that
selected?
Temp. difference
between probes
higher than 35° C ?
NO
YES
NO
NO
starts fan
checks fanrpm
YES
cancelslock
Is fanrpm
exact? YES
Is flue
temperaturehigherthan110°C?
YES
NO
beginningofwaitperiod
Endofwait
period?
YESNO
YES
starts ignition discharges
Opensgas valve
beginningofignitionperiod
flamepresence? YES
interrupts ignition discharges
gasvalve open
fanruns
Endofignition
period?
NO
NO
closesgas valve
stopsfan
interrupts ignition discharges
memorizeslock
displayshowlock--- out
resetkey
pressed?
flamepresence? NO
NO
Is fanrpm
exact? YES
NO
safety thermostat or flue
temperatureprobe lock out? YESNO
YES
YES
stop circulator (3min)
YES
NO
flamepresence?

- 20 -
CONTROL PANEL ELECTRONIC P.C.B.
7 CONTROL PANEL ELECTRONIC P.C.B.
7.1 Function
Figure 7.1
A
DB
C
A C.H. temperature increase key
B C.H. temperature reduce key
C Reset/Stand-by/Winter/Summer key
D Display
The Control panel electronic p.c.b. can give to the service 3 lev-
els of informations:
• Normally information
• Info modality
• Function modes setting modality
7.2 Normally information
KEY
RESET
The symbol indicates that the boiler can be di-
rectly reactivated by the user, by pressing the
reset button.
The symbol indicates that the fault requires in-
tervention on behalf of specialised technical as-
sistance.
All symbols represented with lines that surround
them,indicatethatthesymbolisashing.
SIGNAL DISPLAYED BY THE LCD
LCD FUNCTION
Er 01 + RESET Lack of burner ignition on safety lockout
Er 02 + RESET Safety thermostat intervention lockout
Er 03 + RESET General lockout
Er 04 + Faulty primary circuit (no water or ab-
senceofow)
Er 05 + Faulty fan control system
Er 06 + Faulty C.H. temp. probe NTC
Er 08 + Faulty external temp. probe NTC
Er 09 + Faultyuetemp.probeNTC
Er 10 + RESET Flue probe intervention lockout
Flamedetectionerror(Anashing+er-
rorashingnumber)
Er 11 + RESET Flame detection error
Er 12 + Faulty central heating temp. probe NTC
(return)
Er 13 + Differentialbetweentheowandreturn
is too close
LCD FUNCTION
Er 14 + RESET Faulty pump or primary temperature
above 105° C
Er 15 + RESET
Noneortoolowwaterow;Faultypump
(temp. difference between probes higher
than 35° C)
Er 16 + RESET
Possible exchange of NTC probes (Flow
or Return) or pump wrongly mounted
(upside – down)
Er 17 + RESET Faulty c.h. temp. probe NTC (Flow or
Return)
Er 18 + RESET Faulty primary circuit (no water or ab-
senceofow)
Er 25 + RESET Flame detection error
Er 69 Wiring error lockout
Boiler Stand-By, hyphens are turned on
in sequence to simulate running /anti-
freeze protection activated)
Boiler waiting for heat request
Boiler in winter mode
The primary circuit temperature is dis-
played.
Boiler on demand for C.H. power.
Burner ignition (spark)
Flame present (Burner on)
Boiler in anti---freeze phase (bPashing
+temperatureashing)
Boiler in antifrost phase (AF ashing +
temperatureashing)
Set C.H. (all other symbols are disabled)
Remote control connected (one ash
every 4 sec.)
Pump activated for the post---circulation
phase (Poashing+temperatureash-
ing)
Delayed burner ignition for setting the
system (uuashing+temperatureash-
ing)
Maintenance required
The wrench symbol is ashing (without
showing any error)