23
EN
Type
No.
Description
Range
U/M
Step
Default
tS
2.9
Anti-legionella Function (Only hot water tank)
-- = Disabled
50 .. 80
-
1
--
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)
-
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
-
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. 32
– as a precautionary measure, close the gas isolation valve.
Repair the fault and start-up the boiler again.
NOTE:
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.