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84
EN
4.5
Unscheduled maintenance
If replacing the electronic board, the user MUST set the
parameters as indicated in the table.
Type
No.
Description
Setting
PAR
01
Index showing boiler power in kW
0 = 25T
0
PAR
02
Hydraulic configuration
0 = rapid
1 = storage tank with thermostat or
heating only
2 = hot water tank with sensor
3 = two programmer
4=instant with solar power input
5 = open vent
2
PAR
03
Gas Type Configuration
0 = G20; 1 = G31
0 or 1
To enter "Parameter setting and display"refer to the indications
provided in the specific section.
Once the parameters in the table have been set, you must carry
out the entire phase of "Self-calibrating procedure" described
in the specific section.
If the gas cock and/or the ignition/detection electrode, and/or the
burner
, and/or the fan are replaced, the user must still carry out
the entire phase of "Self-calibrating procedure" described in
the specific section.
4.6
Possible faults and solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
ALL
02
Low water pressure in
system
- Restore pressure
- Check for any leaks in
the system
ALL
03
High water pressure in
system
- Empty the system via
the drain valve on the
hydraulic assembly and
bring the pressure to
approximately 1.2 bar
ALL
04
Domestic hot water
sensor fault
- Check connections
- Replace the sensor
ALL
05
Delivery sensor fault
- Check connections
- Replace the sensor
ALL
06
No flame detection
- Check the integrity of
the electrode and check
that it is not grounded
- Check gas availability
and pressure
- Check the integrity of
the gas valve and the
card
ALL
07
Sensor or safety
thermostat intervenes
- Check the sensor or
thermostat connections
- Deaerate the system
- Check the bleed valve
- Replace the sensor or
the thermostat
- Check that the pump
impeller is not blocked
ALL
08
Fault in the flame
detection circuit
- Check the integrity of
the electrode and check
that it is not grounded
- Check gas availability
and pressure
- Check the integrity of
the gas valve and the
card
Type
No.
Fault
Solution
ALL
09
No water circulating in
the system
- Check the rotation
of the system pump
impeller
- Check the electrical
connections
- Replace the pump
ALL
10
Auxiliary sensor fault
- Check PAR
02 "hydraulic
configuration"
- Check the electrical
connection
ALL
11
Gas valve modulator
disconnected
- Check the electrical
connection
ALL
12
Incorrect configuration
of the open /sealed
chamber
- Set the parameter
PAR 04 (Combustion
configuration) to 0
ALL
13
Smoke probe
intervention
- Replace the smoke
probe
- Contact the Technical
Assistance Centre
ALL
14
Smoke probe fault
- Replace the smoke
probe
- Check the electrical
connection of the
smoke probe, if the
problem is not resolved,
contact the Assistance
Centre
ALL
15
Fan check cable
disconnected
- Check the connection
cable between the fan
and the board
ALL
18
Condensate level fault
- Check for any clogging
in the pipe which takes
the condensate to the
siphon
- Check that the siphon
is not clogged
ALL
28
Maximum number of
consecutive resets
reached
- Contact the Technical
Assistance Centre
ALL
37
Fault due to low network
voltage.
- Check with tester
- Contact network
provider (ENEL)
ALL
40
Incorrect network
frequency detected
- Contact network
provider (ENEL)
ALL
41
Flame loss more than 6
consecutive times
- Check the detection
electrode
- Check the gas supply
(open valve)
- Check mains gas
pressure
ALL
42
Button fault
- Check that buttons are
working
ALL
43
Open Therm
communication fault
- Check the electrical
connection of the
remote control
ALL
62
Self-calibrating
procedure is required
- Carry out the self-
calibrating procedure
(see the specific
section)
ALL
72
Incorrect positioning of
the delivery sensor
- Check that the delivery
sensor is attached to
the delivery pipe
ALL
81
Block due to combustion
during start-up
- Check for blockage in
chimney
- Bleed the air from the
gas circuit
ALL
83
Irregular combustion
(temporary error)
- Check for blockage in
chimney
ALL
96
Block due to clogging in
smoke outlet
- Check for blockage in
chimney
-
-
Frequent relief valve
intervention
- Check circuit pressure
- Check expansion vessel
-
-
Limited production of
domestic hot water
- Check the diverter valve
- Check that plate heat
exchanger is clean
- Check domestic hot
water circuit valve
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