Ferroli PREXTHERM RS3 Mode D'emploi page 23

FAULT
THE BOILER DIRTIES QUITE EASILY
CAUSE: Burner poorly adjusted
Flue blocked
Burner air intake path dirty
THE BOILER DOES NOT REACH THE SET TEMPERATURE
CAUSE: Boiler body dirty
Boiler/burner combination
Burner flow-rate insufficient
Control thermostat
BOILER THERMAL SAFETY SHUTDOWN WITH INDICATOR LIGHT
ON THE CONTROL PANEL
CAUSE: Control thermostat
No water
Air present
THE BOILER REACHES THE SET TEMPERATURE BUT THE CENTRAL HEATING SYSTEM IS COLD
CAUSE: Air in the system
Pump fault
Minimum thermostat (if featured)
ODOUR OF UNBURNED SUBSTANCES
CAUSE: Flue gas leaking into the environment
FREQUENT ACTIVATION OF THE SAFETY VALVE
CAUSE: System circuit pressure
System expansion vessel
SOLUTION: Check the burner adjustment (flue gas analysis)
Clean the flue gas path and the flue
Clean the burner air intake
SOLUTION: Clean the flue gas path
Check the data and adjustments
Check the burner adjustment
Check correct operation
Check the set temperature
SOLUTION: Check correct operation
Check the set temperature
Check the wiring
Check the probe bulbs
Check the circuit pressure
Check the vent valve
SOLUTION: Vent the system
Reset the pump
Check the set temperature
SOLUTION: Check and if necessary clean the boiler body
Check and if necessary clean the flue
Check the tightness of the boiler and the flue
SOLUTION: Check the fill pressure
Check the system circuit
Check the calibration
Check the set temperature
Check
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GB