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Source Procedure Causes Correction
Burner Blownfuse Replacethe fuse.Place the trouble light
between the black and
white leads to the burner
motor. No light indicates
that no power is getting to
the motor.
Place trouble light between
the black and white leads to
the blower motor. Light
indicates power to the
motor and burner fault.
Binding burner blower
wheel
Sized fuel pump
Defective burner motor
Turn off power and rotate the blower wheel by hand.
Ifseized, free the wheel or replace the fuel pump.
Replace the motor.
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 Water in oil tank If water depth exceeds 1 inch, pump
insert into bottom of tank. or drain water.
Listen for pump whine. Tank shut-off valve closed Open valve.
Oil Filters & Oil Listen for pump whine. Oil line filter is plugged Replace filter cartridges.
Line 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. Air leak in oil supply line Locate and correct leak.
Start the burner. No oil or milky oil Tighten all connections.
indicates loss or prime.
Oil Pump Replace pump.
Nozzle
Ignition
Electrodes
Ignition
Transformer
Install pressure gauge on pump and
read pressure. Should not be less
than 140 psi.
Disconnect ignition leads. Observe
the oil spray (gun assembly must be
removed from unit). Inspect the
nozzle for plugged orifice or carbon
build-up around orifice.
Remove gun assembly and inspect
electrodes and leads.
Connect ignition leads to the
transformer. Start burner and
observe spark. Check line voltage
to transformer primary.
Pump is partially or completely
frozen. No pressure and the motor
locks out on overload.
Coupling disengaged or broken - no
3ressure
Fuel pressure too low
Nozzle orifice plugged
Nozzle strainer plugged
Poor or off center spray
Fouled or shorted electrodes
Dirty electrodes and leads
Eroded electrode tips
Improper electrode gap spacing
Improper position of electrode tips
Bad buss bar connection
Cracked or chipped insulators
Cracked or burned lead insulators
Low line voltage
Burned out transformer windings.
No spark or weak spark
Re-engage or replace coupling.
Adjust to 100 psi.
Replace nozzle with the same size,
spray angle, and spray type.
Clean electrode leads.
Clean electrode tips and reset the
gap to 5/32 inches and correctly
position tips.
Re-tension and realign.
Replace electrode.
Replace electrode leads.
Check voltage at power source.
Correct cause of voltage drop or call
the power company.
Replace the transformer.
Properly ground the transformer
case.
table continued on next page
505082M 10_5
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