3 .15
Troubleshooting
FAULT
CAUSE
SOLUTION
There is a smell of gas .
Leaks from the supply circuit.
− Check that all joints are tight and that
the pressure measurement points are
closed.
There is a smell of combustion
fumes.
There is a smell of combustion
fumes.
Check:
− That all joints are tight.
− That the flues are not obstructed.
− That combustion is efficient.
Combustion is uneven.
Incorrect gas pressure at burner.
− Check setting.
Burner and heat exchanger need
cleaning.
− Check condition.
Heat exchanger pipes obstructed.
− Check cleanliness of pipes.
Fan malfunctioning.
− Check functioning.
Ignition is slow and the burner
pulses.
Incorrect gas pressure at burner.
− Check setting.
Problem with the ignition electrode.
− Check position and condition.
Boiler gets dirty very quickly.
Inefficient combustion.
− Check colour of flame.
− Check combustion settings.
Burner does not start on signal
from control panel.
Problem with gas valve.
− Check presence of 230Vac at termi-
nals of gas valve. Check wiring and
connections.
Boiler does not start up.
No electrical power
(green LED off).
Check:
− electrical connections.
− fuse.
The boiler does not reach its tem-
perature set point.
Burner dirty.
− Clean the combustion chamber.
Insufficient air/fuel flow to burner.
− Check and adjust the burner.
Boiler settings.
− Check correct functioning.
− Check temperature setting.
Burner locks out.
Boiler settings.
− Check correct functioning.
− Check temperature setting.
− Check electrical wiring.
− Check positioning of sensors.
No water supply.
− Check the vent and bleed valves.
− Check CH circuit pressure.
Boiler reaches set temperature but
radiators are still cold.
Air in the circuit.
− Bleed the circuit.
Pump malfunctioning.
− Unseize the pump.
− Change the pump.
− Check pump electrical connections.
Pump does not start.
Pump malfunctioning.
− Unseize the pump.
− Change the pump.
− Check pump electrical connections.
53
TECHNICAL ASSISTANCE SERVICE
