Kostrzewa Twin Bio Manual De Uso página 84

84 13. Example equipment failures and remedies
Failure
Automatic fuel ignition not working
– 'No fi re/fuel' message
Black smoke in the combustion
chamber. Not combusted fuel in the
ash pan
Flying fuel particles in combustion
chamber. Not combusted fuel in the
ash pan
Set temperature not reached
Smoke coming from the boiler
Experts in heating
Probable cause
• Incorrect settings of heating element
heating time and fire test
• Incorrect heating element connection
• Heating element hot air outlet blocked
• Heating element failure
• Flame sensor contamination/failure
• Flame sensor opening at the rear
grate wall contaminated
• Incorrect air volume
• Incorrect feed and pause time for
specifi c power
• Incorrect air volume
• Incorrect feed and pause time for
specific power
• Incorrect boiler size
• Sensor failure
• Incorrect location of the return water
temperature sensor
• Set boiler power too low
• Blocked flue
• Boiler extension duct blocked
• Heat exchanger channels blocked
Remedy
• Change settings
• Check heating element plugs and
cables (with connectors)
• Clean igniter opening
• High fuel moisture content
• Replace heating element
• Replace or clean the flame sensor
• Clean flame sensor opening
• Reduce air volume, check feed and
pause time (burner power too high)
• Reduce air volume, check feed and
pause time (burner power too high)
• Check correct boiler selection
• Check sensors
• Check return sensor location (water
circulation required)
• Check burner feed and pause times
• Clean the ducts and channels
User Manual Twin Bio - PLV 09.13