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Type
No.
Description
tS
1.8
Re-ignition delay
domestic Hot Water Modulation with Flow meter
tS
1.9
0 = disabled
1 = Enabled
tS
2.0
Maximum power domestic hot water
tS
2.1
Minimum power heating/domestic hot water (premixed)
domestic hot water preheating enabling
tS
2.2
0 = oFF; 1 = on
Auxiliary tA function
0 = according to tA
tS
2.5
1 = tA Antifreeze
2= domestic hot water disabled
tS
2.6
Zone Valve / pump Relaunch delay
tS
2.8
dHW activation delay with solar power
Anti-legionella Function (only hot water tank)
tS
2.9
-- = disabled
tS
3.0
Maximum domestic hot water temperature
digital / analogue pressure switch
0 = water pressure switch
tS
3.5
1 = water pressure transducer
2 = water pressure transducer (only pressure displayed)
tS
4.0
Modulating pump Speed
tS
4.1
∆t Modulating pump delivery/Return
System pump forcing (only in winter mode)
tS
4.7
0 = disabled
1 = Enabled
tS
4.8
InSt parameter set to default
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
– as a precautionary measure, close the gas isolation valve.
Repair the fault and start-up the boiler again.
after having repaired the fault, when the alarm number
NOTE:
appears on the display together with the message RESEt (see
figure), press the button
o
(
to start the appliance up again.
Fig. 30
R
) for approximately 3 seconds
Range
0 .. 60
0 .. 1
0 .. 100
0 .. 100
0 .. 1
0 .. 2
0 .. 99
0 .. 30
50 .. 80
35 .. 67
0 .. 2
-- = no modulation
Au = Automatic 30
.. 100
10 .. 40
0 .. 1
RESET
0 .. 1
3.5
fault / malfunction codes
Type
No.
Description
Al
02
low water pressure in system
Al
03
High water pressure in system
Al
04
domestic hot water sensor fault
Al
05
delivery sensor fault
Al
06
no flame detection
Al
07
Safety thermostat intervention
Al
08
Fault in the flame detection circuit
Al
09
no water circulating in the system
Al
10
Auxiliary sensor fault
Al
11
Gas valve modulator disconnected
Al
12
Incorrect configuration of the open /sealed chamber
Al
13
Smoke probe intervention
Al
14
Smoke probe fault
Al
15
Fan check cable disconnected
Al
18
condensate level fault
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
62
Self-calibrating procedure is required
Al
72
Incorrect positioning of the delivery sensor
Al
81
Block due combustion during start-up
Al
83
Irregular combustion (temporary error)
Al
96
Block due to clogging in smoke outlet
U/m
Step
Default
Min
1
3
-
1
1
%
1
100
%
1
0
-
1
0
-
1
0
Min
1
1
Min
1
0
-
1
--
°c
1
60
-
1
0
%
10
Au
%
1
20
-
1
0
-
1
0
73
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