Riello Gulliver BS1 Installation, Use And Maintenance Instructions page 50

FAULTS
The burner locks out
d u r i n g t h e p r e p u r g e
phase.
The burner continues to
repeat the starting cycle
without going on lock-
out.
OPERATING FAULTS
Burner lock-out due to
Burner shut down due to : – Gas pressure switch opening.
2146
POSSIBLE CAUSES
The air pressure switch does not
change over to the operational posi-
tion.
The flame exists.
The pressure test point (11, fig. 9,
page 8) is badly positioned.
The gas pressure in the gas-mains
lies very close to the value to which
the gas pressure switch has been set.
The sudden falling-off pressure at the
opening of the valve causes the
opening of the pressure switch.
H o w e v e r t h i s o n l y t e m p o r a r i l y ,
b e c a u s e t h e v a l v e i m m e d i a t e l y
closes again, so then does the pres-
sure switch, because the pressure
builds-up again, causing the cycle
to be repeated over and over.
: – Earth probe
– Air pressure switch opening
The pressure switch is faulty, change it.
The air pressure is too low, (the head is
bad adjusted).
Faulty valves: replace them.
Place it in the right position according to
the instructions of this manual on page
8, chapter 4.2.
Lower and set the pressure switch.
12 GB
SOLUTION