54
ENGLISH
TECHNICAL ASSISTANCE SERVICE
CAUSE
FAULT
SOLUTION
Burner dirty.
Insufficient air/fuel flow to burner.
Incorrect temperature setting.
The boiler does not reach its
temperature set point.
Clean the combustion chamber.
Check and adjust the burner.
Adjust the temperature setting
and check on correct functioning.
Verify the temperature setting.
No water supply.
Wrong boiler temperature
setting.
Incorrectly positioned sensors.
Sensors malfunctioning/faulty.
Burner locks out.
Check the vent and bleed valves.
Check CH circuit pressure.
Verify the temperature setting.
Check positioning of sensors.
Check correct functioning of
sensors and electrical cables.
Air in the circuit.
Pump malfunctioning.
Boiler reaches set
temperature but radiators are
still cold.
Bleed the circuit.
Unseize the pump.
Change the pump.
Check pump electrical
connections.
Pump malfunctioning.
Pump does not start.
Unseize the pump.
Change the pump.
Check pump electrical
connections.
Problem with CH circuit
expansion vessel.
Circuit pressure too high.
Safety valve incorrectly
calibrated or faulty.
The safety valve keeps
opening.
Check efficiency of expansion
vessel.
Check circuit pressure.
Check pressure reducer.
Check valve setting and efficiency.