3066
19
GB
6.1
START-UP PROBLEMS
FAULT
POSSIBLE CAUSES
SOLUTION
The burner doesn’t
start when the limit
thermostat closes.
Lack of electrical supply.
Check presence of voltage in the
L1 - N clamps of the 7 pin plug.
Check the conditions of the fuses.
Check that safety thermostat is not
lock out.
Thermostats are faulty.
Replace them.
The connections in the control box are
wrongly inserted.
Check and connect completely all the
plugs.
Check that the bridge socket P is present.
The burner goes in
safety lock-out before
or during the pre-
purge phase.
The flame detector sees strange light.
Eliminate the light.
Burner runs normally
in the prepurge and
ignition cycle and
locks out after 5 sec-
onds ca.
The flame detector is dirty.
Clear it.
The flame detector is defective
Change it.
Flame moves away or fails.
Check pressure and output of the fuel.
Check air output.
Change nozzle.
Check the coil of solenoid valve
1st stage.
Yellow flame.
Nozzle dirty or worn.
Replace it.
Defect in the air output.
Adjust the air output.
Pump pressure is not correctly set.
Verify the pressure and the output of the
fuel and adjust them according to the in-
structions of this manual.
Air suction inlet is clogged.
Clear it.
Obstruction in the exhaust circuit.
Clear it.
Burner starts with an
ignition delay.
The ignition electrodes are wrongly
positioned.
Adjust properly as indicated herein.
Air output is too high.
Set air delivery properly as indicated here-
in.
Nozzle dirty or worn.
Replace it.
