31
In order to view the set domestic hot water temperature val-
ue, simply press either the "+" or "-" button for the domestic
hot water function one time only.
The value set by the user, expressed in Celsius, will be
shown on the two-digit right-hand display.
35
Fig. 37
4 5 3 Monitor function
The two digits on the right-hand side of the display nor-
mally show the current temperature value of the water in
the heating circuit, or else that of the domestic hot water
circuit, if the boiler is currently satisfying a domestic hot wa-
ter request. However, all the temperatures detected by the
board using the "monitor" function can also be displayed.
In order to activate this function, hold down the “SUMMER/
WINTER” button (Fig. 30) until the first digit is displayed as
a flashing “0”.
At this point, release the button and press it again immedi-
ately to confirm that you want to access the monitor func-
tion.
At this point, the digit on the left will show the number for
the type of temperature being read, and the two digits on
the right will display the value of the temperature in ques-
tion.
The user can scroll through the various temperatures using
the "+" and "-" buttons for the heating function.
The following table shows the various temperatures that
can be displayed:
Temperature
DIG1
DIG1
DIG3
Delivery temperature
1
Value
Return temperature
2
Value
Domestic hot water temper-
ature
3
Value
Outdoor temperature
4
Value
Flue gas temperature
5
Value
Second circuit temperature
(if present)
6
Value
Fan speed
7
Val. x 100
Ionisation current
8
Value*
(*)
The ideal value for the ionisation current is 70-80
To exit the monitor function, press the "SUMMER/WINTER"
button again.
The appliance automatically exits the function if no button
is pressed for 15 minutes.
4 5 4 Error messages
The boiler is equipped with a self-diagnostics system in or-
der to help the maintenance personnel identify the causes
of any anomalies.
When a technical anomaly occurs, the display on the left
will either show the letter "A" or the letter "E", while the dis-
play on the right will show a numeric error code, which will
allow the maintenance personnel to identify the possible
cause.
- If the letter "A" appears on the left-hand display, this
means that the "RESET" button will have to be pressed
after the cause of the fault has been eliminated.
- If the letter "E" appears on the left-hand display, this
means that the boiler will resume functioning normal-
ly, without having to press the "RESET" button, once
the cause of the fault has been eliminated.
The list of the error codes and the descriptions of the rela-
tive anomalies are provided below:
Error
type
Description
A 01
No flame
A 02
The burner has shut off three times while a
request was in progress.
Defective ignition transformer.
Defective ignition transformer power cable.
Flue gas pipe obstructed or partially obstruct-
ed.
A 03
The delivery temperature has exceeded the
set value
A 04
Possible safety thermostat intervention due to
overheating
A 05
Temporary internal fault
A 07 (*) Low temperature zone safety thermostat inter-
vention (if present)
E 01
Delivery temperature probe open
E 02
Return temperature probe open
E 08
Domestic hot water temperature probe open
E 11
Delivery temperature probe short-circuit
E 12
Return temperature probe short-circuit
E 18
Domestic hot water temperature probe
short-circuit
E 21
Phase and neutral connections inverted
E 35
Flue gas probe short-circuit or flue gas tem-
perature too high
E 36
Flue gas probe open
E 37
Differential pressure switch intervention or
water pressure to low
U 10 (*) Low-temperature system delivery temperature
probe interrupted
U 11 (*) Low-temperature system delivery temperature
probe short-circuit
U 21 (*) Delivery temperature >55°C (e.g. due to a
mixer valve fault)
U 99 (*) Electrical power supply interruption on the
multi-temperature kit's electronic board
(*)
Errors associated with the multi-temperature control
board (where present and enabled)
If an error not present in the table is displayed, contact the
Technical Assistance Centre.
