58
COMMISSIONING AND MAINTENANCE
3.10
Troubleshooting
FAULT
CAUSE
SOLUTION
There is a smell of fumes
Fumes escaping into the air
− Check that the burner body is clean
− Check that the flue pipes are clean
− Check the condition of the boiler seals
− Check the quality of combustion
The boiler gets dirty very quickly
Burner badly adjusted
− Check adjustment of burner (perform
flue gas analysis)
Blockage in stack
− Clean flue pipes
Burner air intake dirty
− Clean the burner air intake
The generator is at temperature but the
heating system is cold
Air in the circuit
− Bleed the circuit
Pump malfunctioning
− Check/unseize the pump
− Change the pump
The boiler does not reach its
temperature setpoint
Dirt boiler body
− Clean
Burner capacity insufficient
− Check and adjust the burner
Boiler temperature setpoint
− Check correct functioning
− Check the temperature setting
The generator triggers a thermal safety
block
Safety thermostat / delivery
overtemperature
− Check correct functioning
− Check the temperature setting
− Check the electrical wiring
− Check the position of the sensor bulbs
No water
− Check the bleed valve
− Check the heating circuit pressure
The safety valve keeps opening
Incorrect central heating circuit pressure
− Check the circuit pressure
− Check pressure reducer functioning
− Check efficiency of safety valve
CH expansion vessel
− Check the efficiency of the expansion
vessel
The circulator does not work
Pump seized
Electrical connections
− Check the pump and connections
The request from the ambient thermostat
is missing
− Check the temperature controller, sen-
sors and connections
