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Source Procedure Correction
Power Locate and secure connection.
Ifvoltage fluctuates, fault is
in the power source.
Recheck voltage at the
power source.
Causes
Loose wiring connection
Low or fluctuating line voltage Call power company.
Source
Poor Fire
Flame Detector
Oil Supply
Procedure
After burner fires,
immediately jumper
across flame detector
terminals at the primary
control.
• If burner continues to
run (does not lock out
of safety), fault may be
poor fire. Inspect fire.
• If fire is good, check for
fault in flame detector
circuit.
• If burner loses flame
(does not lock out on
safety), fault is in the
fuel system.
Causes
Unbalanced fire
Too much air - - lean short fire
Too little air - - long dirty fire
Excessive draft
Too little draft or restriction
Dirty CAD cell face
Faulty CAD cell - - exceeds 15000
hms
Loose or defective cad cell wires
Pump loses prime - air slug
Pump loses prime - air leak in
supply line
Water slug in line
Correction
Replace nozzle
Reduce combustion air - check combustion.
Increase combustion air - check combustion.
Adjust barometric damper for correct draft.
Correct draft or remove restriction.
Clean CAD cell face.
Replace CAD cell.
Partially plugged nozzle or nozzle
strainer
Listen for pump whine Restriction in oil line Clear restriction.
Plugged fuel pump strainer Clean strainer or replace pump.
Cold oil - outdoor tank Change to number 1 oil.
Secure connections or replace cad cell holder
and wire leads.
Prime pump at bleed port
Check supply line for loose connections and
tighten fittings.
Check oil tank for water (over 1 inch) pump or
drain out water.
Replace nozzle.
505082M 10_5
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