Operating Faults - Riello MG569-BWZG Installation, Use And Maintenance Instructions

4.2

Operating faults

Fault
The burner locks out during op-
eration.
The burner tends to lose the
flame in the passage from the
1st to 2nd stage.
Burner shut down.
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Faults - Possible causes - Solutions
Possible Causes
Earth probe.
The flame disappears 4 times.
Air pressure switch opening.
Burner output ratio between the 1st and 2nd
greater than 1:2.
High air excess in 1st stage.
Gas pressure switch opening.
Solution
Check the right position and if necessary set it ac-
cording to the instructions of this manual.
Clean or replace the ionisation probe.
Check the gas pressure in the network and/or ad-
just the solenoid valve according to the instruc-
tions of this manual.
The air pressure is too low, (the head is bad adjust-
ed).
The air pressure switch is defective: change it.
Restore the correct maximum ratio of 1:2 checking
that the burner output of the 1st stage is not less
than the minimum of the firing rate.
Restore the correct air excess value (l min. = 1.3)
see paragraph "4.4 combustion control".
Check the pressure in the network and/or adjust
the solenoid valve according to the instructions of
this manual.
22 GB
Tab. J