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TECHNICAL ASSISTANCE SERVICE
TECHNICAL ASSISTANCE SERVICE
4.9
Troubleshooting
FAULT
CAUSE
SOLUTION
The boiler does not reach its
temperature setpoint
Boiler dirty
− Clean the flue gas pipes
Heat exchanger and burner mismatched
− Check specifications and settings
Burner capacity insufficient
− Check and adjust the burner
Control thermostat faulty
− Check correct functioning
− Check the temperature setting
The boiler keeps shutting down, and the
control panel warning light comes on
Control thermostat faulty
− Check correct functioning
− Check the temperature setting
− Check the electrical wiring
− Check the sensors
No water supply
Air in the circuit
− Check the circuit pressure
− Check the vent valve
The generator is at temperature but the
heating system is cold
Air in the circuit
− Bleed the circuit
Pump malfunctioning
− Check/unseize the pump
Problem with minimum temperature
thermostat (if present)
− Check the temperature setting
There is a smell of fumes
Fumes escaping into the air
− Clean the boiler body
− Clean the flue gas pipes
− Check that the boiler, flue pipes and
flue gas exhaust stack are all properly
sealed
The safety valve keeps opening
Incorrect circuit pressure
− Check the circuit pressure
− Check pressure reducer functioning
− Check pressure reducer setting
CH expansion vessel
− Check the efficiency of the expansion
vessel
There are traces of condensate on the
rear head
Flue gas box seals
− Check the seals between the rear head
and the flue gas box
