GB
INCONVENIENTI DI FUNZIONAMENTO, CAUSE E RIMEDI
FAULTS
• The heater fails to start
• The heater stops and the warning light (1)
•
comes on
• the heater stops and then starts again
• Fan noise or vibrations
CAUSES
• No power supply
• Main switch in wrong position
• Faulty operation of room thermostat
• Gas pressure switch tripped due to no gas
• Air pressure switch tripped due to fan
•
malfunction
• Air pressure switch tripped due to pressure
•
switch malfunction
• The ionisation electrode does not detect a
•
flame
• Safety thermostat tripped due to the
•
combustion chamber overheating
• Control unit tripped due to irregular
•
burner operation
• Faulty electronic control unit
• Faulty thermostat
• Burner thermostat tripped
• Gas pressure switch tripped due to sudden
•
drop in gas supply pressure
• Foreign bodies on fan blades
• Little air circulation
18
REMEDIES
• Check power specifications
• Check power connections
• Check fuse
• Select correct position
• Check thermostat position
• Check thermostat operation
• Check that the gas supply hose has been bled
• Check the gas supply pressure
• Check that the suction and the flow grills
•
are unobstructed
• Check that the fan is running freely
• Check the electric motor and the condenser
•
and, if faulty, replace them
• Replace the pressure switch
• Remove the flame sensor and clean it
• Check that the suction and the flow grills
•
are unobstructed
• Check that the room is well ventilated
• Check that the hot air can escape freely
• Check that the gas flow or pressure are
•
not excessive
• Contact Service Assistance
• Check the unit and if necessary replace it
• Check the thermostat and if necessary
•
replace it
• Air distribution ducts too long or with
•
insufficient diameter
• Check the gas supply pressure
• Remove foreign bodies
• Eliminate all possible obstacles to proper
•
air flow