76
EN
8.5
Unscheduled maintenance
If replacing the
electronic board
, the user MUST set the parame-
ters as indicated in the table and in the sequence shown.
Type
No.
Description
Setting for
Vera HE
25
30
tS
0.1
Index showing boiler power
in kW
6 = 25; 7 = 30
6
7
tS
0.2
Hydraulic configuration
0 = rapid
1 = storage tank with thermo-
stat 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
To enter "Parameter setting and display" refer to the indica-
tions provided in the specific section.
Once the parameters in the table have been set, you must carry
out the entire phase of "Automatic 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 "Automatic self-calibrating procedure"
described in the specific section.
8.6
Malfunction codes and possible solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
AL
01
Smoke thermostat
- Contact the Technical Assis-
tance Centre
AL
02
Low water pressure
in system
- Restore pressure
- Check for any leaks in the
system
AL
03
High water pres-
sure in system
- Empty the system via the
drain valve on the hydrau-
lic assembly and bring the
pressure to approximately
1.2 bar
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 inter-
venes
- Check the sensor or thermo-
stat connections
- Deaerate the system
- Check the bleed valve
- Replace the sensor or the
thermostat
- Check that the pump impel-
ler is not blocked
Type
No.
Fault
Solution
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 circulat-
ing in the system
- Check the rotation of the
pump rotor
- Check the electrical connec-
tions
- Replace the pump
AL
10
Auxiliary sensor
fault
- Check the hydraulic configu-
ration using "tS 0.2"
- Check the electrical con-
nection
AL
11
Gas valve modula-
tor disconnected
- Check the electrical con-
nection
AL
12
Domestic hot water
sensor fault in tank
mode
- Set the parameter tS 0.4
(Combustion configuration)
to 0
AL
13
Smoke probe inter-
vention
- Check the sensor is working
- Replace the smoke probe
AL
14
Smoke probe fault
- Replace the smoke probe
- Check the electrical connec-
tion of the smoke probe
- Contact the Technical Assis-
tance 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 conden-
sate to the siphon
- Check that the siphon is not
clogged
AL
28
Maximum number
of consecutive
resets reached
- Wait 1 hour and try unblock-
ing the board again
- Contact the Technical Assis-
tance Centre
AL
30
Return sensor fault
(boiler sensor fault
for T models)
- Replace the return probe
- Check parameters
- Contact the Technical Assis-
tance 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 com-
munication fault
- Check the OT electric con-
nection
AL
44
No flame valve
opening time sum
anomaly
- Check for the presence of
water hammer on the hot
water system and, if present,
mount a water hammer
arrestor
- Check for any abnormal
requests on the room ther-
mostat
- Contact the Technical Assis-
tance Centre
AL
56
Lock for
∆T
deliv-
ery/return over max
limit (open vent)
- Contact the Technical Assis-
tance Centre
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