Page 53
JBE(X) Manual
Section H - Troubleshooting
H. Troubleshooting
No.
System
Cause
Correction
1
No Ignition
Electrode is grounded. Porcelain is cracked.
Replace
(lack of spark)
Improperly positioned electrode
Recheck dimensions
Loose ignition wire connection
Reconnect or tighten
Defective ignition transformer
Check transformer, replace
2
No Ignition
Lack of fuel, no gas pressure, closed fuel valve
Check fuel supply and valves
(spark, no flame)
No voltage to pilot solenoid
Check electrical connections
Defective pilot solenoid valve
Replace
Incorrect location of pilot
Check location of pilot
Improper raw gas tube position
Check location of raw gas tube
Improperly positioned electrodes
Recheck dimensions
Too much combustion air flow
Check air damper position
3
Pilot not detected
Scanner tube not positioned correctly
Check location of scanner tube
(flame present)
Scanner tube dirty
Clean scanner tube
Scanner or amplifier faulty
Replace
Pilot improperly positioned
Check pilot position
Incorrect gas pressure to pilot
Readjust pressure
Combustion air flow rate too high
Readjust damper
4
No main gas flame
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 flame
Weak scanner signal
Clean scanner lense and tube
(pilot OK)
Damper or fuel control valve setting incorrect
Readjust
Fuel valve(s) not opening
Check wiring to valves
Oil nozzle or line obstructed
Check nozzle 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 fire
Manual pot in low fire position (low fire hold)
Readjust to high fire position
Manual-auto switch in wrong position
Change position of switch
Modulating Control
Check wiring or replace
Loose linkage
Readjust and tighten
Binding linkage or valve
Readjust 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 fire
Improper excess air level
Readjust excess air
(firing gas)
Input too low for burner components
Check input, compare to rating label
