Troubleshooting burner failures
10
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
40
10.2 Burner failure - reasons and solutions
Burner Failure
Reason
Solution
CO
2
-Value too high
Air fan pressure too low
Increase fan pressure (see Chapter 4 „Technical data and
scope of delivery“, page 9).
Oil flow too high
Reduce oil pressure (see Chapter 4 „Technical data and
scope of delivery“, page 9). Check mixing system.
Insufficient combustion air
Check fresh air supply. Provide more combustion air.
Burner dirty
Clean burner and fan housing.
Incorrect nozzle selection
Change oil nozzle.
Damaged nozzle
Change oil nozzle.
Incorrect air mixture
Change out mixing system/diffuser plate.
CO
2
-Value to low
Fan pressure too high
Reduce fan pressure (see Chapter 4 „Technical data and
scope of delivery“, page 9).
Oil flow too low
Increase oil pressure (see Chapter 4 „Technical data and
scope of delivery“, page 9).
Entry of excess air
Check tightness of boiler door bolts. Check air tightness of
vent pipe (see Chapter 8.2 „Verifying tightness of fireside
heating surfaces“, page 35).
Gasket defective between burner tube and
mixing system
Install new gasket.
Incorrect mixing system
Check mixing system.
Incorrect oil nozzle
Change out oil nozzle.
Defective oil nozzle
Change out oil nozzle.
Plugged nozzle filter
Change out oil nozzle.
Burner does not run
Power outage
Check main breaker, emergency shut-off switch, boiler
Aquasmart control and STB controller.
Open circuits in control panel?
Check boiler control panel.
Defective oil pre-heater thermostat?
Replace oil pre-heater.
Caution: After longer shut-off times, the
burner start-up time can be 2 to 3 minutes
In case of excessively long start-up delays: check burner pri-
mary controller, check burner motor. Replace if necessary.
Burner starts, oil level at
sight glass of oil filter re-
mains empty
Incorrect connections at initial burner start-
up
Check proper connection of oil lines.
Oil line does not fill after initial start-up; sev-
eral minutes pass before oil is available
Vent oil lines (see Chapter 6.3 „Checking and connecting oil
lines“, page 15).
Oil in tank? Open connection in oil supply
line?
Check oil level and verify shut-off in oil line.
Incorrect flow direction for flow check?
Verify proper flow check operation.
Defective coupling between motor and
pump
Replace coupling.
Defective suction line or excessive vacuum
levels. Oil line pressed together.
Check oil supply line (see Chapter 9.4 „Testing Integrity of oil
supply line“, page 38).
Separate shut-off closed. External shut-off
closed.
Open defective shut-off. Check entire oil supply lines.
Burner starts up, oil
pressure available, no
ignition, emergency
shut-off.
Ignition transformer or ignition cable defec-
tive.
Replace ignition transformer or ignition cable. Check power
to ignition transformer.
Used electrodes or damaged insulating ma-
terial.
Replace ignition electrodes.
Incorrect setting of electrodes.
Correct electrode settings.
False flame sensing.
Check flame sensor, replace as needed. Check solenoid
and oil pump. Replace as needed.
Burner Primary control defective.
Replace burner primary control.
Table 13 Troubleshooting Table