Operation Shutdown - Ariston E-COMBI 24 User Manual

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Boiler protection devices
The boiler is protected from malfunctioning by
means of internal checks performed by the electronic
microprocessor P.C.B., which stops the boiler from
operating if necessary.
In the event of the boiler being shut off in this
manner, the leds code show the type of shut-off and
the reason behind it.
There are two types of shut-off:
Safety shut-off
This type of error is "volatile", which means that the
boiler starts up again automatically as soon as the
problem which caused the shut-off is removed; the
yellow led 9 flash and the C.H. Temperature leds 1
indicate the error code. (see table)
In fact, soon as the cause of the shut-off disappears,
the boiler starts up again and continues to operate
normally.
If the boiler still indicates a safety shut-off , switch
it off. Make sure the external electric switch is
in the OFF position, shut off the gas valve and
contact a qualifi ed technician.
Shutdown due to insufficient water circulation
If the green leds 1 flash and the boiler is off , one
possible cause for this stateis an insufficient pressure
of water in the system - green leds 40-50 blink. Check
the water pressure on the pressure gauge 4 and make
sure that is between 0.6 and 1.5 bar when the system
is cold. If the pressure is just under the minimum refill
the system by open the valve under the boiler.
If the pressure drops very frequently, there may be a
water leak at some point in the system. If this is the
case a plumber should be contacted.

Operation shutdown

This type of error is "non-volatile", which means that
it is not removed automatically (the red led 8 will
illuminate and the C.H. Temperature led 1 will indicate
the error code). In this case the boiler does not restart
automatically, but it may be reset by pressing the
button. If the problem manifests itself again
after several attempts to reset the appliance, contact
a qualified technician.
Important
If this shutdown occurs frequently, contact an
authorised service centre for assistance. For
safety reasons, the boiler will allow a maximum
of 5 reset operations to take place in 15 minutes
(individual presses of the button). If the shutdown
is occasional or an isolated event, this is not a
problem.
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Temporary shutdown due to defective discharge
of exhaust fumes.
The boiler is fitted with safety devices, which in the
event of a defective discharge of exhaust fumes,
automatically interrupts the gas supply, there by
shutting off the boiler.
The shut-off of the boiler is temporary and is
indicated by the illuminationof the yellow led 9 for a
period of about 1 minutes.
Once this time period has passed and the discharge
state of exhaust fumes has returned to normal, the
boiler automatically turns back on.
IMPORTANT! If
frequently, contact an Authorised Service
Centre. So that they may check that the
exhaust fumes are being expelled correctly
and that the area is ventilated properly.
Anti-frost Device.
The anti-frost function acts on the central heating
flow temperature probe, independently from other
regulations, when the electrical supply is turned on.
If the primary circuit temperature is between
°C and 8°C the pump will run (with the diver-
ter valve switching between central heating and
hot water every 1 minute) until the temperature
reaches > 9°C.
If the flow temperature remains between °C and
8°C the pump will continue to run for a maximum of
0 minutes unless a temperature above > 9°C is de-
tected in the central heating flow, after this the the
burner will fire (heating position) until a temperature
of > 0°C is detected.
If the central heating flow temperature is < °C, the
burner will fire (heating position) at minimum power
until the temperature reaches > 0°C, the burner will
go out.
If lockout is caused by overheat the burner will not
fire but the pump will continue to run (heating po-
sition).
The anti-frost device activates only when (with the
boiler operating correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.
this situation occurs