Fault description
Cause
Solution
Room temperature control is not
correct
Check the setting for the room temperature controller
Strainer is dirty
Clean the strainer
Room temperature controller does
not work correctly
Check the wiring for the room temperature controller
Actuator appears not to work
Actuator closed without current. Connect actuator to zone valve
electrically
Radiator thermostatic valves or
return screw connections closed
Check the thermostatic valves and return screw connections on the
radiators
No hot water and no heating
Ball valves closed
Open ball valves
Central heating circuit pump not
working
Check that the central heating circuit pump is working and correctly set
Central strainer is dirty
Clean the central strainer
Heating system is not working
correctly
Check the heating system
Buffer storage tank is not filled
Check the buffer storage tank filling
Combi Port XS
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Installation and operation manual
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