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

Page 20

505082M 10_5

Page 19 Page 21
Page 20
Image 20
Lennox International Inc O23V-105, O23V5-140, O23V5-154 Source Procedure Causes, Burner, Correction, Replacethe fuse
Page 19 Page 21

O23V2-90, O23V-90, O23V4-105, O23V5-154, O23V3-70 specifications

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