Enertech Bentone STG 146, Installation And Maintenance Instruction, Page: 25 / 32

CAUSE
Voltage lower than 185 V
The ignition electrodes are disturbing the ionisation
current
Bad earthing
Phase and neutral transposed
The burner locks out during pre-purge
Air pressure switch defective or incorrectly adjusted.
The starting load is not correctly adjusted
The gas pressure is too low
Pulsations at start
The ignition electrodes are wrongly adjusted
The gas pressure is too high
The flue gas side is blocked
Pulsations during operation
The burner is not correctly adjusted
The burner is dirty
Defective chimney
The burner is operating correctly but locking out
now and then
The ionisation current is too low
The UV-cell is in a wrong position
Voltage drop at certain times
Air pressure switch defective or incorrectly adjusted
Spark-over in ignition electrodes
REMEDY
Contact the electricity authorities.
Adjust the ignition electrodes, repole the ignition transfor-
mer if necessary.
Arrange for proper earthing.
See wiring diagram and change.
Reduce or increase the gas supply. Reduce the quantity
of air.
Increase the pressure. Contact the gas supply company
if necessary.
Readjust.
Check and adjust by means of a pressure gauge and a
pressure adjustment valve.
Check the chimney flue.
Readjust
Clean the burner.
Check and change the dimensions if necessary.
Check. Must be at least 4 µ A according to the relay
manufacturer but should be 8-20 µ A.
Adjust.
Must not drop more than 15% of the rated current. Contact
the electricity authorities if necessary.
Replace the electrodes
3(4)