Riello Vokera VISION PLUS 20 S User Instructions page 29

High efficiency system boiler
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board, it is possible to change the HEATING setpoint as
follows: press the keys C or D and select the desired level of
comfort within the range (-5 - +5).
Note: if an outdoor temperature sensor is connected it is in
any event possible to have the boiler operate at a fixed point
by setting the parameter P4.18 = 0 (menu P4).
5.8.5 SAFETY STOP
If there are ignition faults or boiler operation malfunctions,
carry out a "SAFETY STOP". On the display, in addition to the
fault code, the icon
is also displayed, which blinks with a
frequency of 0.5sec ON and 0.5sec OFF.
The backlight blinks for 1min after which it switches off, while
the icon
continues blinking.
On the 4 digits a message scrolls containing the error code
and its description.
5.8.6 RESET FUNCTION
The RESET icon comes on when there is an alarm that
requires a manual reset by the user (for example flame
lockout). To reset press key 2 RESET.
If the release attempts do not restart the boiler, contact your
local Technical Assistance Centre.
DAY
DAY
RESET
29

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