Ariston CLAS HE R 12 - Page 6

6
user manual
Appliance shut-o 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 o in this manner, a code appears
on the control panel display which refers to the
type of shut-o and the reason behind it.
Two types of shut-o may occur:
Safety shut-o
This type of error is “volatile”, which means
that the boiler starts up again
automatically as soon as the
problem which caused the shut-
o is removed. The display will
ash ”Err” and the error code.
As soon as the cause of the shut-o disappears,
the boiler starts up again and continues to
operate normally.
While the boiler is shut o for safety reasons, it is
possible to attempt to restore normal operation
by switching the appliance o and on again
using the ON/OFF button on the control panel.
If the boiler still indicates a safety shut-o, switch
it o. Make sure the external electric switch is in
the OFF position, close the gas tap and contact
a qualied technician.
Operation shutdown
This type of error is “non volatile”, which means
that it is not removed automatically. The display
will ash Err and the error code and the red
led lights up “3”
.
In this case the boiler does not restart
automatically, but it may be reset by pressing
the button 2. 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).
Operation shutdown error table
Anti-frost Device.
The anti-frost function acts on the central hea-
ting 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 tempe-
rature reaches 33°C, the burner will go
o
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.
Display Description
1 01 Overheating
5 01 No ame detection
1 03
Insu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