Lennox International Inc O23V-105 Source Procedure Causes, Burner, Correction, Replacethe fuse

Source	Procedure	Causes
Burner	Place the trouble light	Blown fuse
	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 Binding burner blower the black and white leads to wheel

the blower	motor. Light	Sized fuel	pump
indicates power to the
motor and	burner fault.	Defective	burner motor

Correction

Replacethe fuse.

Turn off power and rotate the blower wheel by hand. If seized, 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

Install pressure

gauge

on pump and

Pump is partially or completely

Replace

pump.

read

pressure.

Should

not be less

frozen. No pressure

and the motor

than

140 psi.

locks out on overload.

Coupling

disengaged

or broken - no

Re-engage or replace

coupling.

3ressure

Nozzle	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.
Ignition	Remove gun assembly and inspect
Electrodes	electrodes	and leads.

Ignition	Connect ignition leads to the
Transformer	transformer. Start burner and
	observe spark. Check line voltage
	to transformer primary.

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

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

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