46
EN
– press the button
<
to make the boiler operate at minimum
power "Lo" and check that the gas pressure values on the
pressure gauges correspond to those indicated in the table
below. The message “Lo” will appear on the display together
with the flashing symbols
l
and
n
– press the button
>
once again to make the boiler operate at
maximum power. If the gas pressure values are correct it is
possible to determine the combustion data and take a reading
of the combustion efficiency as provided for by legislation in
force
– press the button
y
to exit the "Chimney sweeper Proce-
dure”. The boiler water delivery temperature will appear on
the display
– close the taps opened previously and check that the appliance
shuts down
– disconnect the pressure gauges, carefully close the pressure
points (6) and (7), put the control panel back to the original
position and refit the front panel (2).
Gas supply pressure
Type of gas
G20
G31
Pressure (mbar)
20
37
Installations with SPLIT and C
ONCENTRIC flue gas outlet pipe
systems
Model
Heat Output
Pressure at nozzles (mbar)
G20
G31
UNIQA REVOLUTION 25
Max
13,3 - 13,8
35,2 - 35,7
min
2,9 - 3,2
6,1 - 6,5
8.6
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
UNIQA REVOLU-
TION 25
-
PAR
01
Index showing boiler power in kW
0 = 25
0
PAR
02
Hydraulic configuration
5 = Low NOx ErP
5
PAR
03
Gas Type Configuration
0 = G20; 1 = LPG
0 or 1
PAR
04
Combustion configuration
3 = Low NOx ErP APS
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
out the "
Automatic calibration procedure
".
If the
gas valve
and/or the
ignition/detection electrode
and/or the
fan
are replaced, the user must still carry out the entire phase
of "
Automatic calibration procedure
" described in the specific
section.
8.7
Malfunction codes and possible solutions
a
WARNING
If, with the HEATING or DOMESTIC HOT WATER re-
quest active, the boiler fails to work (the
t
or
r
re-
quest symbol appears on the display), verify that the
fan’s fuse (1), installed on the fan’s power cable, is
working. If not, replace it.
1
Fig. 62
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
ALL
02
Low water
pressure in
system
- Restore pressure
- Check for any leaks in the system
ALL
03
High water
pressure in
system
- Empty the system via the drain valve
on the hydraulic assembly and bring
the pressure to approximately 1.2 bar
ALL
04
Domestic
hot water
sensor fault
- Check connections
- Replace the sensor
ALL
05
Delivery
sensor fault
- Check connections
- Replace the sensor
ALL
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
ALL
07
Safety
thermostat
intervention
- Check the delivery sensor connections
- Deaerate the system
- Check the bleed valve
- Replace the delivery sensor
- Check that the pump impeller is not
blocked
ALL
08
Fault in
the flame
detection
circuit
- 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
ALL
09
No water
circulat-
ing in the
system
- Check the rotation of the pump rotor
- Check the electrical connections
- Replace the pump
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