Ariston CLAS ONE R 15 - Boiler Shutdowns and Error Codes; Safety Shut-off (Volatile Errors); Operation Shutdown (Non-Volatile Errors); Anti-frost Device Functionality

USER’S MANUAL
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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;
and the error code (e.g.
/ ) ash on the display and the
symbol appears.
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 qualied technician.
Operation shutdown
This type of error is “non-volatile”, which means that it is not
removed automatically.
On the display ash and the error code , e.g.
Err/501 and appears the symbol .
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 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 button).
If the shutdown is occasional or an isolated event, this is not
Necessarily a problem.
Anti-frost Device.
The anti-frost function acts on the central heating ow
temperature probe, independently from other settings, when
the electrical supply is turned on.
If the primary circuit temperature falls below 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 ow temperature is > 8°C, the pump stops;
b) if the ow temperature is between 4 and 8°C, the pump will
run for another two minutes;
c) if the ow temperature is < 4°C, the burner will re at
minimum power until the temperature reaches 33°C, the
burner will go off and the pump will continue to run for two
minutes.
The anti-frost device activates only when (with the boiler
operating correctly):
- the boiler is electrically powered,
- there is a supply of gas.
- there is a supply of gas.
Operation shutdown error table
Display Description
1 01 Overheating
1 03
Insufcient circulation
1 04
1 05
1 06
1 07
3 05 P.C.B. error
3 06 P.C.B. error
3 07 P.C.B. error
5 01 No ame detection