Enertech BG950, Installation And Maintenance Instructions Manual

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38
15. FAULT LOCATION GUIDE
Cause Remedy
Pulsations at start
The ignition electrodes are
wrongly adjusted
Re-adjust.
The gas pressure is too high Check and adjust by means of a
pressure gauge and a pressure
adjustment valve
The flue gas side is blocked Check the chimney flue
Pulsations during operation
The burner is not correctly
adjusted
Re-adjust
The burner is dirty Clean the burner.
Defective chimney Check and change the dimen-
sions if necessary.
The burner is operating
correctly but locking out now and then
The ionisation current is too low Check. Must be at least 4 µ A ac-
cording to the relay manufacturer
but should be 8-20 µ A.
The UV-cell is in a wrong position Adjust.
Voltage drop at certain times
Must not drop more than 15% of
the rated current.
Air pressure switch defective or
incorrectly adjusted
Contact the electricity authorities
if necessary.
Spark-over in ignition electrodes Replace the electrodes
The ambient temperature of the
gas relay is too high
Heat insulate, max. 60° C.
The ignition spark is too weak Check the transformer
Bad combustion
Bad draught conditions Check the chimney
The flue gas temperature is too
high
The boiler is overloaded. Reduce
the quantity of gas
The CO
2
-content is too low Check the boiler with regard to
leaks. Choke the draught if it is
too high
The CO-content is too high
Excess air when using natural
gas and gasoil (propane, butane)
Choke the air.
Air shortage Open the air supply. Check the
flue gas damper
The holes in the gas nozzle are
clogged
Clean
The fresh air intake is too small Check and enlarge
The flame is not burning straight
because the burner head is out of
position
Check the burner head and
re-adjust