76
EN
Type
No.
Description
Range
U/M
Step
Default
tS
3.0
Maximum domestic hot water temperature
35 .. 67
°C
1
60
tS
3.5
Digital / analogue Pressure switch
0 = water pressure switch
1 = water pressure transducer
2 = water pressure transducer (only pressure displayed)
0 .. 2
-
1
0
tS
4.0
Modulating Pump Speed
-- = No modulation
AU = Automatic 30
.. 100
%
10
AU
tS
4.1
∆
T Modulating pump delivery/Return
10 .. 40
%
1
20
tS
4.7
System pump forcing (only in winter mode)
0 = Disabled
1 = Enabled
0 .. 1
-
1
0
RESET
tS
4.8
INST Parameter set to default
0 .. 1
-
-
0
In the event of a fault/malfunction the message
“AL”
will appear
on the display alternating with the alarm number eg.
“AL 04”
(Domestic Hot Water Sensor Fault).
Before repairing the fault:
– disconnect the appliance from the mains power by setting the
main switch to "OFF"
OFF
Fig. 30
– as a precautionary measure, close the gas isolation valve.
Repair the fault and start-up the boiler again.
NB:
after having repaired the fault, when the alarm number
appears on the display together with the message RESET (see
figure), press the button
o
(
R
) for approximately 3 seconds
to start the appliance up again.
3.5
Fault / malfunction codes
Type
No.
Description
AL
01
Smoke thermostat
AL
02
Low water pressure in system
AL
04
Domestic hot water sensor fault
AL
05
Delivery sensor fault
AL
06
No flame detection
AL
07
Sensor or safety thermostat intervenes
AL
08
Fault in the flame detection circuit
AL
09
No water circulating in the system
AL
11
Gas valve modulator disconnected
AL
12
Incorrect configuration of the open /sealed chamber
AL
17
Fault regarding maximum deviation between the 2
NTC heating sensors
AL
28
Maximum number of consecutive releases
AL
37
Fault due to low network voltage
AL
40
Incorrect network frequency detected
AL
41
Flame loss more than 6 consecutive times
AL
42
Button fault
AL
43
Open Therm communication fault
AL
44
Anomaly inside electronic board
AL
62
The self-calibrating procedure must be carried out
AL
72
Incorrect positioning of the delivery sensor
AL
74
Fault in the 2nd element of the delivery sensor
AL
80
Anomaly in gas valve control line
AL
81
Block due combustion during start-up
AL
83
Irregular combustion (temporary error)
AL
88
Anomaly inside electronic board
AL
96
Block due to clogging in smoke outlet