92
EN
8.3.3
System
Type of malfunction or fault
Cause
Solution
Smell of unburnt products
Dispersion of fumes in the environ-
ment
- Check the cleanliness of the burner body
- Check the cleanliness and tightness of the smoke outlet and
generator
- Check the combustion quality
The generator gets dirty quickly
Burner poorly adjusted
- Check the burner adjustment (fume analysis)
Clogged flue pipe
- Clean the fume duct
Burner air path dirty
- Clean the burner air spiral
The generator is at the operating
temperature and the heating system
is cold
Presence of air in the system
- Bleed the system
Faulty pump
- Refer to the pump fault table
Minimum-temperature thermostat
faulty
- Replace the minimum-temperature thermostat
The generator does not reach the
operating temperature
Generator body dirty
- Clean the combustion chamber
Insufficient burner capacity
- Check the condition of the nozzle (wear and cleanliness)
- check the pump pressure
Thermal unit regulation thermostat
- Verify the correct operation
- Check the set temperature
The generator locks out
Thermal unit regulation thermostat
- Verify the correct operation
- Check the set temperature
- Check the wiring
- Check the position of sensor bulbs
Lack of water
- Check the bleed valve
- Check the pressure of the heating circuit
Frequent intervention of the safety
valve
Heating system pressure
- Check the pressure on the pressure gauge
- Check the pressure reducer
- Check the efficiency of the valve
System expansion vessel
- Check the efficiency and the pre-charge
Smell of unburnt products
Dispersion of fumes in the environ-
ment
- Check the cleanliness of the burner body
- Check the cleanliness and tightness of the smoke outlet and
generator
- Check the combustion quality
The generator gets dirty quickly
Burner poorly adjusted
- Check the burner adjustment (fume analysis)
Clogged flue pipe
- Clean the fume duct
Burner air path dirty
- Clean the burner air spiral
The generator is at the operating
temperature and the heating system
is cold
Presence of air in the system
- Bleed the system
Faulty pump
- Refer to the pump fault table
Minimum-temperature thermostat
faulty
- Replace the minimum-temperature thermostat
The generator does not reach the
operating temperature
Generator body dirty
- Clean the combustion chamber
Insufficient burner capacity
- Insufficient burner capacity
Thermal unit regulation thermostat
- Verify the correct operation
- Check the set temperature
The generator locks out
Thermal unit regulation thermostat
- Verify the correct operation
- Check the set temperature
- Check the wiring
- Check the position of sensor bulbs
Lack of water
- Check the bleed valve
- Check the pressure of the heating circuit
Frequent intervention of the safety
valve
Heating system pressure
- Check the pressure on the pressure gauge
- Check the pressure reducer
- Check the efficiency of the valve
System expansion vessel
- Check the efficiency and the pre-charge
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