Troubleshooting - Riello TAU Unit 50 Installation And Maintenance Manual

3.10 Troubleshooting

FAULT
The burner performs pre-ventilation
and ignition correctly but shuts down
after about 5 attempts
The burner shuts down during pre-
ventilation
The burner shuts down after pre-
ventilation because the flame fails to
ignite
The burner does not start when it
receives the control signal
There is a smell of gas
There is a smell of fumes
The boiler reaches the set temperature
but the radiators are still cold
The boiler does not reach its
temperature setpoint
The generator triggers a thermal safety
block
CAUSE
Flame not detected
No gas supply
Flue blocked
Flame detection error
The flame is already lit
Air intake obstructed
Gas valve feeds too little gas
Gas valve faulty
Weak or no ignition arc
Air in gas line
No electrical power
No gas supply
Electrical short circuit
Leaks from the supply circuit
Fumes escaping into the air
Air in the circuit
Pump malfunctioning
Boiler dirty
Burner capacity insufficient
Incorrect boiler temperature setpoint
Incorrect boiler temperature setpoint
No water
73
COMMISSIONING AND MAINTENANCE
SOLUTION
− Call Technical Assistance Service
− Check gas valve opening
− Check flue
− Call Technical Assistance Service
− Call Technical Assistance Service
− Check for blockage
− Check gas supply pressure
− Call Technical Assistance Service
− Call Technical Assistance Service
− Bleed the gas feed circuit
− Check voltage at gas valve terminals
− Check the condition of the fuses
− Check the opening of the valve in line
− Call Technical Assistance Service
− Check the seal of the gaskets and the
closure of the pressure tapping points
− 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
− Bleed the circuit
− Check/unseize the pump
− Change the pump
− Clean the combustion chamber
− Check and adjust the burner
− Check the temperature setting
− Check correct functioning
− Check the temperature setting
− Check the electrical wiring
− Check the bleed valve
− Check CH circuit pressure