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SC Manual Toubleshooting
No. System Cause Correction
1 No Ignition Electrode is grounded. Porcelain is cracked. Replace
Loose ignition wire connection Reconnect or tighten
Defective ignition transformer Check transformer, replace
Ignition wire burned Replace ignition wire - increase air
2
No Ignition Lack of fuel, no gas pressure, closed fuel valve Check fuel supply and valves
(spark, no ame) No voltage to pilot solenoid Check electrical connections
Defective pilot solenoid valve Replace
Too much combustion air ow Check air damper position
3 Pilot not detected Scanner tube not positioned correctly Check location of scanner tube
(ame present) Scanner tube dirty or wet (oil lm) Clean scanner tube / scanner
Scanner or amplier faulty Replace
Incorrect gas pressure to pilot Readjust pressure
Combustion air ow rate too high Readjust damper
Pressure drops when opening primary zone Increase separator pilot delay
4 No main gas ame Weak scanner signal Clean scanner lens and tube
(pilot OK) Damper or fuel control valve setting incorrect Readjust
Fuel valve(s) not opening Check wiring to valves
5 No main oil ame Weak scanner signal Clean scanner lens and tube
Damper or fuel control valve setting incorrect Readjust
Fuel valve(s) not opening Check wiring to valves
Oil nozzle or line obstructed Check nozzles and lines, clean
No atomizing air pressure Check compressor wiring
Compressor pressure too low or high Readjust
Burner not level, oil is draining into vessel Check level, adjust as required.
6 Burner stays at low re Manual pot in low re position (low re hold) Readjust to high re position
Manual-auto switch or low re hold switch in wrong position Change position of switch
Modulating Control Check wiring or replace
7 Burner shuts down Loose electrical connection Check and tighten connections
during operation Loss of fuel supply Replenish fuel supply
Limit switch breaks (opens) Readjust limit switch
8 Burner does not start Main disconnect switch is open Close switch
Loose electrical connection Check electrical connections
Operating controls are tripped Check and reset operating limits
High or low fuel pressure Check fuel supply - reset switches
9 High CO at low re Improper excess air level Readjust excess air
(ring gas) Input too low for burner components Check input, compare to rating label
J. TROUBLESHOOTING
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