Troubleshooting - Ferroli PREXTHERM RSW 92N Instructions D'utilisation, D'installation Et De Montage

8.7 Troubleshooting

The following is a list of the main faults and problems that may occur during boiler operation, specifying possible causes and solutions.
FAULT
THE BOILER IS EASILY SOILED
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
Lack of water
Air present
THE BOILER REACHES THE SET TEMPERATURE, BUT THE CENTRAL HEATING SYSTEM IS COLD
CAUSE: Air present in the system
Pump fault
Minimum thermostat (if featured)
ODOR OF UNBURNED SUBSTANCES
CAUSE: Flue gas leaking into the environment
FREQUENT ACTIVATION OF THE SAFETY VALVE
CAUSE: System circuit pressure
System expansion vessel
EN
62
PREXTHERM RSW 92N ÷ 600N
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 electrical 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 that the boiler body is clean
Check that the flue is clean
Check the tightness of the boiler and flue
SOLUTION: Check the fill pressure
Check the system circuit
Check the calibration
Check the set temperature
Check
cod. 3541P130 - Rev. 00 - 02/2018