Saunier Duval Themaclassic F30E Instructions For Use Installation And Servicing page 33

18 Fault Finding
FAULT: NO HEATING
NO The setting is too low or the boiler
Is the heating set high enough ?
is set to summer mode.
YES
Turn the setting up by turning the
central heating temperature
control knob clockwise.
YES
NO
Is the room thermostat in demand ? Adjust the setting.
YES
Check the thermostat, the line,
the connections both
YES
Check by overriding the room thermostat
to the room thermostat and
at the connector. Does the fault persist ?
the control board (PCB).
YES
Check the electrical connections
to the control board (PCB).
NO
Is the system fitted with
If the problem persists fit a
a external sensor ?
replacement control board (PCB).
YES
Unplug the sensor
and test it individually.
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