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– refit the assembly by carrying out the same operations for re-
moval but in the reverse order and tighten the screws (9) of
the door to the combustion chamber
– mount the nozzle (14) back on and adjust it so that the flared
part faces downwards, as shown in the figure
17
– reconnect the connections to the fan and the electrode.
8.4
Checks
8.4.1
Checking the smoke duct
It is recommended that the user checks that the combustion air
inlet duct and smoke outlet duct are integral and airtight.
8.4.2
Checking the expansion vessel pressure
It is recommended that the expansion vessel on the water side
is drained and that the prefilling pressure is not less than 1 bar .
If this is not the case, pressurize it to the correct value (see sec-
tion "Expansion vessel").
Once the checks described above have been completed:
– refill the boiler as described in section "REFILL operations"
– check that the siphon has been filled correctly
– Start the boiler, activate the "Chimney sweeper function" and
carry out a smoke analysis and/or measure the combustion
efficiency
– refit the front panel securing it with the two screws which
were removed previously.
108
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.
Motor
No.
type
tS
0.1
tS
0.2
tS
0.3
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
Fig. 51
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
, and/or the fan are replaced, the user must still carry
burner
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
Motor
No.
Fault
type
AL
01
Smoke thermostat
Low water pressure
AL
02
in system
Domestic hot water
sensor fault (return
AL
04
sensor fault for T
models)
AL
05
Delivery sensor fault
AL
06
No flame detection
Sensor or safety
AL
07
thermostat intervenes
Fault in the flame
AL
08
detection circuit
No water circulating
AL
09
in the system
Description
Index showing boiler power
in kW
4 = 40
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
Gas Type Configuration
0 = G20; 1 = G30/G31
Solution
- Contact the Technical
Assistance Centre
- Restore pressure
- Check for any leaks in the
system
- Check connections
- Check the sensor is
working
- Check connections
- Check the sensor is
working
- 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
- 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
- Check the integrity of the
electrode and check that it
is not grounded
- Check the integrity of the
gas valve and the card
- Check the rotation of the
pump rotor
- Check the electrical
connections
- Replace the pump
EN
Setting for
MIA
HE C10
40
4
0
0 or 1
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