Page 21
Troubleshooting: Burner starts, but no flame is established.
Source
Procedure
Causes
Correction
Oil Supply
Check tank gauge or use dip
stick.
No oil in tank
Fill tank.
Coat dip stick with litmus paste
and insert into bottom of tank.
Water in oil tank
If water depth exceeds 1 inch,
pump or drain water.
Listen for pump whine.
Tank shut-off valve closed
Open valve.
Oil Filters & Oil Line
Listen for pump whine.
Oil line filter is plugged
Replace filter cartridges.
Kinks or restriction in oil line
Repair or replace oil line.
Plugged fuel pump strainer
Clean strainer or replace pump.
Open bleed valve or gauge port.
Start the burner. No oil or milky
oil indicates loss or prime.
Air leak in oil supply line
Locate and correct leak.
Tighten all connections.
Oil Pump
Install pressure gauge on pump
and read pressure. Should not
be less than 140 psi.
Pump is partially or completely
frozen. No pressure and the
motor locks out on overload.
Replace pump.
Coupling disengaged or broken
- no pressure
Re-engage or replace coupling.
Fuel pressure too low
Adjust to 140 psi.
Nozzle
Observe the oil spray (gun as
sembly must be removed from
unit). Inspect the nozzle for
plugged orifice or carbon build-
up around orifice.
Nozzle orifice plugged
Replace nozzle with the same
size, spray angle, and spray
pattern.
Nozzle strainer plugged
Poor or off center spray
Ignition Electrodes
Remove gun assembly and in
spect electrodes.
Fouled or shorted electrodes
Clean or replace electrodes.
Dirty electrodes
Eroded electrode tips
Clean electrode tips and use
T-501 gauge to reset the gap to
5/32 inches and correctly posi
tion tips.
Improper electrode gap spacing
Improper position of electrode
tips
Bad buss bar connection
Retension and realign.
Cracked or chipped insulators
Replace electrode.
Ignition
Transformer
Start burner and observe spark.
Check line voltage to transform
er primary.
Low line voltage
Check voltage at power source.
Correct cause of voltage drop
or call the power company.
Burned out transformer wind
ings.
Replace the transformer.
No spark or weak spark
Properly ground the transformer
case.
Burner Motor
Motor does not come up to
speed and trips out on overload.
Turn off power and rotate blower
wheel by hand to check for bind
ing or excessive drag.
Low line voltage
Check voltage at power source.
Correct cause of voltage drop
or the call power company.
Pump or blower overloading
motor
Correct cause of overloading.
Faulty motor
Replace motor.
