85
EN
Type
No.
Fault
Solution
AL
09
No water circulating in
the system
- Check the rotation
of the system pump
impeller
- Check the electrical
connections
- Replace the pump
AL
11
Gas valve modulator
disconnected
- Check the electrical
connection
AL
12
Incorrect configuration
of the open /sealed
chamber
- Set the parameter
tS 0.4 (Combustion
configuration) to 1
AL
17
Fault regarding
maximum deviation
between the 2 NTC
heating sensors
- Replace the dual
sensor
AL
28
Maximum number of
consecutive resets
reached
- Contact the Technical
Assistance Centre
AL
37
Fault due to low network
voltage.
- Check with tester
- Contact network
provider (ENEL)
AL
40
Incorrect network
frequency detected
- Contact network
provider (ENEL)
AL
41
Flame loss more than 6
consecutive times
- Check the detection
electrode
- Check the gas supply
(open valve)
- Check mains gas
pressure
AL
42
Button fault
- Check that buttons are
working
AL
43
Open Therm
communication fault
- Check the electrical
connection of the
remote control
AL
44
Anomaly inside electronic
board
- Replace the board
AL
62
The self-calibrating
procedure must be
carried out
- Carry out the self-
calibrating procedure
(see the specific
section)
AL
72
Incorrect positioning of
the delivery sensor
- Check that the delivery
sensor is attached to
the delivery pipe
AL
74
Fault in the 2nd element
of the delivery sensor
- Replace the sensor
AL
80
Anomaly in gas valve
control line
- Check/replace the
connection cable to the
gas valve
AL
81
Block due to combustion
during start-up
- Check for blockage in
chimney
- Bleed the air from the
gas circuit
AL
83
Irregular combustion
(temporary error)
- Check for blockage in
chimney
AL
88
Anomaly inside electronic
board
- Replace the board
AL
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