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6
ECONOMY/COMFOR
T MODE
The selector knob “E” allows the user to choose the economy mode (position “E”) or the
comfort mode (position “C”).
The economy mode is the normal state for the operation of the boiler, since the domestic
water is heated up only when a tap is turned on.
The comfort mode is a special operating state, because the water contained in the
secondar
y exchanger and in the primary exchanger is kept in a pre-heated condition,
thereby allowing a quicker delivery of Domestic Hot Water when required.
TURNING OFF THE CENTRAL HEATING
To turn off the Central Heating, rotate the “C” knob to the “0” position.
The boiler will sta
y in ‘summer’ mode, providing Domestic Hot Water on request.
TURNING
OFF THE BOILER
To turn the boiler off, rotate the selector knob “A” to the “0” position (OFF); the display
will go off
. Close the gas cock located under the boiler and turn the electricity supply
s
witch (located outside the boiler) to the OFF position.
BOILER SHUTDOWN SITUATIONS
The boiler is equipped with safety devices that intervene in certain situations and shut it
off. Most of these situations are signalled by means of the L.E.D.s and in some
circumstances the user may be able to remedy them.
SHUTDOWN DUE TO IGNITION FAILURE
This anomaly is indicated by “
AA 0011
” on the display. To reset the boiler, press
and then release the
“D” button.
At this point, the electronic ignition system will attempt to light the burner again.
Should the boiler fail to ignite a second time, check that the external gas
cock is open. If the problem persists, contact an Authorised Service
Centre.
SHUTDOWN DUE TO OVERHEATING
This anomaly is indicated b
y
“
AA 0033
” on the displa
y
.
The boiler has shutdo
wn
because the safety thermostat detected that the boiler temperature has
exceeded the maximum limit.
T
o reset this state, wait until the boiler has cooled and press the button
“D”.
If the safety thermostat operates on a frequent basis, contact one of our
Authorised Service Centres.
SHUTDOWN DUE TO INSUFFICIENT WATER CIRCULATION
This anomaly is indicated b
y
“
EE 0022
” on the displa
y.
One of the possible causes of this shutdown situation could be the lack of water
in the boiler or water circulation failure in the primary heating circuit.
Check the system pressure on the pressure gauge
“K” and, if it is less than 0.5
bar, try bringing the system pressure up to a mean value
of 1.0 bar by opening the water inlet valve. Then reset by
turning the boiler off and then back on by pressing the
button “D”.
3.USEFUL INFORMATION
AND TROUBLESHOOTING
E
C
E
C
E
econom
y
EC EC
conf
ort
PL006D
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
II II
PL004D
C
PL008D
A
PL007D
PL055D
PL012D
K