Ravelli HR EVO 200 SMART Use And Maintenance Manual page 166

Various signals
SIGNAL ANOMALY
Occurs on relighting the
AWAITING COOL boiler immediately after
having shut it down.
AIRFLOW Occurs when the air flow
METER FAILURE meter is disconnected.
Occurs when the water
FROST RISK temperature falls below a
certain value.
Occurs when the boiler
has exceeded 1800
SERVICE DUE hours of operation or
2000 Kg pellet since the
previous servicing.
The flue gas or flame
temperature has
MODULA F
exceeded the maximum
set value.
Use and maintenance manual HR EVO Smart
POSSIBLE CAUSES
Reset attempt in shutdown stage with
boiler hot in cooling stage.
The controller does not detect the
amount of combustion air and does not
shut down the boiler; it only excludes
the air flow meter functions.
The boiler controller detects the water
temperature below 6°C and displays a
message.
Extraordinary maintenance notice.
Too many pellets.
Reduced heat exchange
in the system.
Rev.1 08/09/2021
Pag.49
SOLUTION
Alarm reset is possible only after shut-
down.
Reinstatement operations must be
carried out by a service centre.
The pump starts in order to move the
water inside the heating circuit.
Monitor the water temperature so that it
does not fall below 0°C.
Cleaning - extraordinary maintenance
and reinstatement operations must be
carried out by an authorised service
centre.
Adjust the pellet flow.
Other reinstatement operations must be
carried out by a service centre.
EN