Publicidad
Idiomas disponibles
Idiomas disponibles
steel brushes to clean the bithermal
exchanger and burner.
– Make sure that the upper perforated
part of the burners is free from deposits.
– Re-mount the parts removed from the
boiler, respecting the phases.
– Check functioning of the main burner.
– After the gas connections have been
mounted, sealing must be inspected
using soapy water or relevant products.
Do not use naked flames.
4.5
FUNCTIONING
PROBLEMS
The main burner does not start, when
either heating water or sanitary water is
taken.
– The message "ALL 02" appears on the
control panel display: check and if neces-
sary replace the water pressure valve
(PA).
– The message "ALL 04" or "ALL 05"
appears on the remote control display:
there is a failure of one of the two sen-
sors: it must be replaced.
– The ventilator (V) functions but at a redu-
ced rate, and does not activate the
fumes pressure valve (PF): it must the-
refore be replaced.
– Check that voltage is present at the gas
valve.
– If the main burner still does not start up,
in spite of the above-listed checks, repla-
ce the electronic card.
The boiler starts but shuts down after 10
seconds.
– Check that connection to the earth wire
is guaranteed.
– The electrode is defective: it must be
replaced.
– The fumes pressure valve does not
cause commutation. Check that the
signal at the control points is higher than
the pressure valve setting. Replace the
pressure valve.
– The apparatuses are defective: they
must be replaced.
The sanitary water is hot, but with a
reduced flow.
– Mains water pressure is too low: a
water pump, top tank, or similar system
must be installed.
The water cocks do not give hot or cold
water.
– Check that the domestic hot water inlet
filter is not blocked.
– Heat exchanger or domestic hot water
outlet pipe blocked by lime scale depo-
sits. Remove the deposits.
Noises or crackles issue from the boiler
at the exchanger point.
– Check that the circulator (PI) is not
blocked: if necessar y, pr ovide f or
unblocking.
– Free the circulator rotor of impurities
78
and accumulated sediment.
– Replace the circulator.
– Check that boiler power is adequate for
the real needs of the heating plant.
The boiler safety valve is frequently acti-
vated.
– Check that the filling tap is closed. Repla-
ce if it does not close perfectly.
– Check that the load pressure, when the
plant is cold, is not too high.
– Check that the safety valve maintains the
setting: replace if necessary.
– Check the pre-swollen pressure of the
header tank.
– Replace the header tank.
The main burner burns badly: too high fla-
mes, yellow flames.
– Check that the pressure of the gas to
the burner is regular.
– Check that the burners are clean.
The boiler works but does not increase
the temperature.
– Check that gas consumption is lower
than that foreseen.
– Check that the boiler is clean.
– Check that the boiler is proportionate to
the plant.
The ventilator works, but the burner does
not start.
– Check and if necessary unblock the small
fumes pressure switch pipes (PF) remo-
ving impurities or condensation.
– Check that voltage is present at the gas
valve.
– Replace the fumes pressure switch (PF).
The ventilator does not start.
– Check that the terminals of the activator
motor receive power.
– The electric coil of the motor is burnt
out: it must be replaced.
The gas valve is always at minimum flame.
– The modulator (M) coil is broken: it must
be replaced.
– The card does not send current (mA) to
the modulator (M): it must be replaced.
The boiler switches off along with the
green LED that indicates the presence of
voltage.
– The circuit board PTC automatic restore
circuit breaker protection has interve-
ned. To restore functioning, remove the
voltage from the appliance for at least
one minute by acting on the power sup-
ply electric switch positioned outside the
boiler.
Publicidad
