Riello Gulliver BS1D Manual page 16

FAULTS
Burner tends to pull the
flame when switching
st nd
from 1 to 2 stage.
The burner runs nor-
mally in the prepurge
and ignition cycle and
locks out after about 3
seconds.
The burner starts with
an ignition delay.
The burner doesn't
change over the 2 nd
stage.
The burner locks out
after the prepurge
phase due to flame-
failure.
20023724
POSSIBLE CAUSES
st
Output ratio between 1
greater than 1:2.
st
High air excess in 1 stage.
Phase and neutral connection is
inverted.
The earth connection lacks or is in-
efficient.
The ionization probe is earthed or not
in contact with the flame, or its wiring
to the control box is broken, or there
is a fault on its insulation to the earth.
The ignition electrodes is wrongly
positioned.
Air output is too high.
Valve brake is too close with insuffi-
cient gas output.
The air damper is locked.
The 2 nd stage gas valve doesn't
pull in.
The solenoid valves is passing too
little gas.
The solenoid valves are defective.
The ignition arc is irregular or has
failed.
The pipe has not been purged from
the air.
Restore correct maximum ratio of 1:2,
nd
and 2 stage
making sure 1
than the operating range's minimum.
Restore the correct air excess value (
min. = 1.3) see section "4.4 combustion
control".
Invert them.
Make the earth connection efficient.
Check the right position and if neces-
sary set it according to the instructions
of this manual.
Reset the electrical connection.
Replace the faulty connection.
Adjust it according to the instructions
of this manual.
Set the air output according to the in-
structions of this manual.
Adjust it.
Check the right working.
Check the right electrical connection.
Failed valve: replace it.
The air damper doesn't close com-
pletely and therefore it doesn't pull in
the 2 nd stage valve micro: check the
micro working.
Check the pressure in the network and/
or adjust the solenoid valve according to
the instructions of this manual.
Change them
Check the right insertion of the
connectors.
Check the right position of the elec-
trode according to the instructions of
this manual.
Carry out a complete breathing of the
line of gas-supply.
14 GB
SOLUTION
st
stage output is no less
