FAULTS, CAUSES AND REMEDIES
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
If the cause of the malfunction has not been found with the above checks and remedies, please contact your nearest dealer or authorised
service centre.
EN
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
• Electrical power cable is connected with
polarities L and N reversed
• 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
19
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
• Reverse polarities L and N
• 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