Ariston HS C 24 FF NG - Page 60

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BOILER PROTECTION DEVICES
Appliance shut-off conditions
The boiler is protected from malfunctions by means of internal
checks performed by the electronic P.C.B., which stops the boiler
from operating if necessary. In the event of the boiler being shut
off in this manner, a code appears on the control panel display
which refers to the type of shut-off and the reason behind it.
Two types of shut-off may occur:
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.
On the display ash “Err” and the error
code (es. Err/110) and appear the
symbol - see the error table.
In fact, soon as the cause of the shut-off disappears, the boiler
starts up again and continues to operate normally.
While the boiler is shut off for safety reasons, it is possible to
attempt to restore normal operation by switching the appliance
off and on again using the ON/OFF button on the control panel.
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 qualied technician.
Safety shut-off due to insufcient water pressure
If the water pressure inside the heating
circuit is insufcient, the boiler will
perform a safety shut-off. On the display
ash “Err” and the code - Err/108 -
for Insufcient water pressure -- see
the error table.
Check the water pressure on the
pressure gauge and make sure that is
between 0.6 and1.5 bar when the system is cold. If the pressure
is just under the minimum rell 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.
On the display ash Err and the error code -es. Err/501 ,
and appear the symbol .
In this case the boiler does not restart automatically, but it may
be reset by pressing the RESET button. If the problem manifests
itself again after several attempts to reset the appliance, contact
a qualied 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
RESET button).
If the shutdown is occasional or an isolated event, this is not necessarily
a problem.
HS C
The rst gure of the error code (e.g. 1 01) indicates within
which operational assembly the error occurred.
1 - Primary Circuit
2 - Domestic Hot Water Circuit
3 - Internal Electronic Part
4 - External Electronic Part
5 - Ignition and Detection
6 - Air inlet - ue gas outlet
Malfunction warning
This warning is shown by the display in the following format:
5 P35 P3 = Flame cut-off
the rst gure indicating the operational assembly is followed
by a P (warning) and the code relating to the specic warning.
Anti-frost Device.
The anti-frost function acts on the central heating ow temperatu-
re probe, independently from other regulations, when the electrical
supply is turned on.
If the primary circuit temperature falls be-
low 8°C the pump will run for 2 minutes.
After the two minutes of circulation (xed)
the boiler will check the following:
a) if the central heating ow temperature
is > 8°C, the pump stops;
b) if the central heating ow temperature
is between 4 and 8°C, the pump will
run for another two minutes;
c) if the central heating ow temperature is
< 4°C, the burner will re (heating posi-
tion) at minimum power until the tempe-
rature reaches 33°C, the burner will go
out and the pump will continue to run for two minutes.
If the ow temperature remains between 4-8°C the pump will
continue to run for two minutes for a maximum of 10 times
unless a temperature above 8°C is detected in the central hea-
ting ow, after this the the burner will re. If lockout is caused by
overheat the burner is kept OFF.
The anti-frost device activates only when (with the boiler opera-
ting correctly):
- the system pressure is correct;
- the boiler is electrically powered;
- there is a supply of gas.