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QB-180/300 Oil Burners Series 2 — Burner Manual
If burner
does not start
If burner starts, but
there is no flame
If burner starts
and has flame,
but flame goes out
12
5
Troubleshooting
The relay in the primary control may not be pulling in — Check for:
Broken wires
Dirty thermostat contacts
The motor is out on thermal overload — Check for:
Seized motor bearing
Fan locked against housing
Defective starter switch
Primary control may have pre-purge — Check Control Supplement.
There may be insufficient oil flow — Check for:
Defective fuel pump
Pump strainer clogged
Defective solenoid valve
Loose coupling
There is no ignition spark — Check for:
Defective/loose wiring connec-
tions at primary control or elec-
trode assembly
Incorrect electrode settings
There is oil and spark, but no flame — Check for:
Loose, dirty or defective nozzle
Low pump pressure
Excess air/high draft
Incorrect electrode settings
Primary control will shut off flame — Check for:
Dirty cad cell
View of fire obstructed, so that
cad cell cannot see flame
Defective cad cell
Defective thermostat
Defective primary control
Seized fuel pump
Start winding burned out
Defective wiring
Air leaks in suction line
Clogged or dirty nozzle
Clogged fuel filter
Defective porcelain insulator on
electrode assembly
Defective ignitor
Improper oil conditions
Improper spinner position. To
verify position, see page 5,
step 3g.
Defective primary control
Loss of oil prime
Part number 644-500-065/0200
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