67
4.5
Unscheduled maintenance
Type
No.
Description
Setting for
OPEN HYBRID
SMART
25
tS
0.1
Index showing boiler
power in kW
6 = 25
6
tS
0.2
Hydraulic configuration
0 = rapid
1 = storage tank with
thermostat or heating
only
2 = hot water tank with
sensor
3 = bithermic
4=instant with solar
power input
5 = open vent
0
tS
0.3
Gas Type Configuration
0 = G20; 1 = G31
0 or 1
If replacing the
electronic board
, the user MUST set the
parameters as indicated in the table.
To enter "
Parameter setting and display
"refer to the indications
provided in the specific section.
Once the parameters in the table have been set, you must carry
out the entire phase of "
Self-calibrating procedure
" described
in the specific section.
If the
gas valve
and/or the
ignition/detection electrode
, and/or the
burner
, and/or the
fan
are replaced, the user must still carry out
the entire phase of "
Self-calibrating procedure
" described in
the specific section.
4.6
Malfunction codes and possible solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No. Fault
Solution
AL
01 Smoke thermostat
- Contact the Technical
Assistance Centre
AL
02 Low water pressure
in system
- Restore pressure
- Check for any leaks in the
system
AL
04
Domestic hot water
sensor fault (return
sensor fault for T
models)
- Check connections
- Check the sensor is working
AL
05 Delivery sensor fault - Check connections
- Check the sensor is working
AL
06 No flame detection
- Check the integrity of the
electrode and check that it is
not grounded
- Check gas availability and
pressure
- Check the integrity of the gas
valve and the card
AL
07
Sensor or safety
thermostat
intervenes
- Check the sensor or
thermostat connections
- Deaerate the system
- Check the bleed valve
- Replace the sensor or the
thermostat
- Check that the pump impeller
is not blocked
AL
08 Fault in the flame
detection circuit
- Check the integrity of the
electrode and check that it is
not grounded
- Check the integrity of the gas
valve and the card
AL
09 No water circulating
in the system
- Check the rotation of the
pump rotor
- Check the electrical
connections
- Replace the pump
Type
No. Fault
Solution
AL
10 Auxiliary sensor
fault
- Check the hydraulic
configuration using "tS 0.2"
- Check the electrical
connection
AL
11 Gas valve modulator
disconnected
- Check the electrical
connection
AL
12
Domestic hot water
sensor fault in tank
mode
- Set the parameter tS 0.4
(Combustion configuration)
to 0
AL
13 Smoke probe
intervention
- Check the sensor is working
- Replace the smoke probe
AL
14 Smoke probe fault
- Replace the smoke probe
- Check the electrical
connection of the smoke
probe
- Contact the Technical
Assistance Centre
AL
15 Fan check cable
disconnected
- Check the connection cable
between the fan and the board
AL
18 Condensate level
fault
- Check for any clogging in
the pipe which takes the
condensate to the siphon
- Check that the siphon is not
clogged
AL
28
Maximum number
of consecutive
resets reached
- Wait 1 hour and try unblocking
the board again
- Contact the Technical
Assistance Centre
AL
30
Return sensor fault
(boiler sensor fault
for T models)
- Replace the return probe
- Check parameters
- Contact the Technical
Assistance Centre
AL
37 Fault due to low
network voltage.
- Check the voltage
- Contact your network provider
AL
40 Incorrect network
frequency detected
- Contact your network provider
AL
41
Flame loss more
than 6 consecutive
times
- Check the ignition/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 OT electric
connection
AL
44 Gas valve timeout
fault without flame
- Check gas valve and board
AL
56
Lock for
∆T
delivery/
return over max
limit (open vent)
- Contact the Technical
Assistance Centre
AL
57
Lock for flow
temperature (FT)
check (open vent)
- Contact the Technical
Assistance Centre
AL
62
Self-calibrating
procedure is
required
- Carry out the self-calibrating
procedure (see the specific
section)
AL
72
Incorrect positioning
of the delivery
sensor
- Check delivery sensor
operation and position
AL
74 Second delivery
sensor fault
- Check second delivery sensor
operation and position
AL
77
EV2 SGV current
max/min absolute
limits error
- Check gas valve and board
AL
78 EV2 SGV current
upper limit error
- Check gas valve and board